Insurance & Coverage Navigator

Navigate insurance coverage for invisible illness diagnosis and treatment

$12,000/yr

Avg. Out-of-Pocket Cost

Average annual out-of-pocket spending for patients with invisible illnesses, including specialist visits, lab work, and treatments not covered by insurance.

34%

Specialist Referral Denial Rate

Percentage of specialist referral requests denied on initial submission for invisible illness conditions, often citing lack of medical necessity.

54%

Successful Appeal Rate

Percentage of denied claims that are overturned on appeal. More than half of all denials can be reversed with proper documentation and persistence.

Coverage Guides by Condition

6 conditions

Condition-specific guidance on ICD-10 coding, coverage expectations, prior authorization strategies, and appeal approaches. Understanding your plan’s obligations is the first step to getting the care you need covered.

Lyme Disease

A69.20A69.21A69.22A69.23A69.29

Typically Covered

-Initial diagnostic testing (ELISA, Western blot)
-Standard 2-4 week antibiotic course (doxycycline, amoxicillin)
-Initial specialist consultation
-Basic lab work (CBC, CMP, inflammatory markers)

Commonly Denied

-Extended antibiotic therapy beyond IDSA guidelines (>28 days)
-IV antibiotic therapy for persistent symptoms
-Specialty lab testing (IGeneX, DNA Connexions, Vibrant Wellness)
-Coinfection testing panels (Babesia, Bartonella, Ehrlichia)
-Hyperbaric oxygen therapy
-Integrative or functional medicine visits

Prior Authorization Tips

1.Document failed standard-duration therapy before requesting extensions.
2.Include peer-reviewed literature supporting prolonged treatment (ILADS guidelines).
3.Request that your provider use specific ICD codes for manifestations (A69.21-A69.29) rather than unspecified (A69.20).
4.Obtain a letter of medical necessity from an LLMD (Lyme-literate MD).

Appeal Strategy

Cite the ILADS treatment guidelines alongside IDSA guidelines to demonstrate the legitimate medical controversy. Reference state Lyme mandates if applicable (CT, NY, VA, MA, NH, ME, MN, RI). Include symptom documentation logs and functional impairment assessments.

ME/CFS (Myalgic Encephalomyelitis)

G93.32

Typically Covered

-Primary care and specialist diagnostic visits
-Blood work to rule out other conditions
-Sleep studies
-Basic physical therapy

Commonly Denied

-Tilt table testing for orthostatic intolerance
-Immunological panels beyond standard CBC
-Home health aide services
-Cognitive behavioral therapy framed as curative (vs. coping support)
-Off-label medications (low-dose naltrexone, Abilify)

Prior Authorization Tips

1.Use the updated ICD-10 code G93.32 -- older codes may trigger denials.
2.Document post-exertional malaise (PEM) with activity logs over 2+ weeks.
3.Include functional capacity evaluations from occupational therapy.
4.Reference the 2015 IOM report 'Beyond Myalgic Encephalomyelitis/Chronic Fatigue Syndrome'.

Appeal Strategy

Emphasize that ME/CFS is classified by WHO as a neurological disease (ICD G93.3x). Reference NIH-funded research and the CDC's updated clinical guidance. Document the severity of functional impairment using validated scales (SF-36, Bell CFIDS Disability Scale).

Long COVID

U09.9B94.8

Typically Covered

-Post-COVID evaluation visits
-Pulmonary function testing
-Cardiac workup (echo, EKG, Holter monitor)
-Basic neuropsychological screening
-Physical therapy and pulmonary rehabilitation

Commonly Denied

-Autonomic function testing
-Comprehensive neuropsychological evaluation
-Long-term occupational therapy
-Off-label antivirals (Paxlovid extended courses)
-Hyperbaric oxygen therapy
-Specialized long COVID clinic visits out of network

Prior Authorization Tips

1.Document the initial COVID infection with test results or clinical diagnosis.
2.Use both U09.9 and organ-specific codes for each affected system.
3.Include timeline showing symptom persistence beyond 12 weeks.
4.Reference RECOVER trial findings and NIH long COVID guidance.

Appeal Strategy

Long COVID is recognized as a disability under the ADA (HHS/DOJ joint guidance, July 2021). Cite the WHO clinical case definition and the growing body of NIH RECOVER study publications. Document multi-system involvement with specialist assessments.

Fibromyalgia

M79.7

Typically Covered

-Rheumatology evaluation
-FDA-approved medications (pregabalin, duloxetine, milnacipran)
-Physical therapy
-Basic lab work to rule out other conditions

Commonly Denied

-Trigger point injections beyond limited number per year
-Massage therapy and acupuncture
-IV ketamine or lidocaine infusions
-Extended pain management programs
-Compounded topical pain medications

Prior Authorization Tips

1.Document failed trials of FDA-approved medications before requesting alternatives.
2.Use functional pain scales (FIQ-R) to demonstrate severity.
3.Include documentation of sleep disturbance and cognitive symptoms alongside pain.
4.Request physical therapy as part of a multimodal treatment plan.

Appeal Strategy

Reference ACR diagnostic criteria (2010/2016 revisions). Emphasize that fibromyalgia is a recognized medical condition with FDA-approved treatments. Document the impact on activities of daily living and employment. Include peer-reviewed evidence for requested treatments.

POTS (Postural Orthostatic Tachycardia Syndrome)

I49.8G90.3

Typically Covered

-Tilt table testing (when pre-authorized)
-Cardiology evaluation
-Echocardiogram and Holter monitoring
-Fludrocortisone and midodrine prescriptions

Commonly Denied

-Autonomic function testing panels
-IV saline infusion therapy
-Compression garment prescriptions
-Repeat tilt table testing
-Out-of-network dysautonomia specialists

Prior Authorization Tips

1.Obtain standing vs. supine vitals documented over multiple visits showing HR increase of 30+ bpm.
2.Use both cardiac (I49.8) and neurological (G90.3) codes to capture the full clinical picture.
3.Request tilt table testing through cardiology rather than neurology for better approval rates.
4.Include documentation of syncope or pre-syncope episodes with dates and witnesses.

Appeal Strategy

POTS is increasingly recognized in post-COVID literature. Reference the American Autonomic Society guidelines. Document functional limitations including inability to stand for prolonged periods. Include orthostatic vital sign measurements from clinic visits.

Alpha-gal Syndrome

T78.1T63.481A

Typically Covered

-Allergist/immunologist evaluation
-Alpha-gal sIgE blood testing
-Epinephrine auto-injector prescriptions
-Emergency department visits for anaphylaxis

Commonly Denied

-Repeat alpha-gal antibody level monitoring
-Dietitian consultations for mammalian meat avoidance
-Medication screening for mammalian-derived inactive ingredients
-Extended allergist follow-up visits

Prior Authorization Tips

1.Document tick bite history and timeline of symptom onset.
2.Include lab results showing elevated alpha-gal sIgE levels.
3.Note any anaphylactic reactions with ED records.
4.Request dietitian referral under medical nutrition therapy benefit.

Appeal Strategy

Reference the CDC's recognition of alpha-gal syndrome as an emerging public health concern. Cite the 2023 CDC MMWR report estimating 450,000 affected Americans. Document delayed anaphylactic reactions (3-6 hours post-exposure) to distinguish from typical food allergies.

Know Your Rights

Federal and state laws provide significant protections for patients with invisible illnesses. Understanding these rights is essential for challenging inappropriate denials and ensuring you receive the coverage you are entitled to.

Mental Health Parity Act

-The Mental Health Parity and Addiction Equity Act (MHPAEA) requires insurers to cover mental health and substance use disorders at parity with medical/surgical benefits.
-Many invisible illnesses have comorbid anxiety, depression, and PTSD -- these must be covered without more restrictive limitations than physical health conditions.
-If your plan covers outpatient medical visits with a $30 copay, it cannot charge a $50 copay for mental health visits.
-Request a parity compliance analysis from your insurer if you suspect unequal treatment of mental health claims.

ACA Essential Health Benefits

-The Affordable Care Act requires marketplace and expanded Medicaid plans to cover 10 essential health benefit categories.
-Relevant categories include: ambulatory services, hospitalization, prescription drugs, rehabilitative services, lab services, preventive and wellness services, and mental health services.
-Insurers cannot impose annual or lifetime dollar limits on essential health benefits.
-Preventive services must be covered without cost-sharing, including certain screenings relevant to invisible illness diagnosis.
-Pre-existing condition exclusions are prohibited -- insurers cannot deny coverage for Lyme, ME/CFS, or any chronic condition.

State Lyme Disease Mandates

-Connecticut (2009): Requires insurers to cover long-term antibiotic treatment for Lyme disease when prescribed by a licensed physician.
-New York: Insurance law requires coverage for diagnosis and treatment of Lyme disease without arbitrary treatment duration limits.
-Virginia (2013): Prohibits insurers from denying coverage for long-term antibiotic therapy for Lyme disease.
-Massachusetts, New Hampshire, Maine, Minnesota, Rhode Island: Have enacted varying levels of Lyme coverage protections.
-Check your state's insurance department website for current mandates -- new legislation is introduced regularly.
-State mandates apply to state-regulated plans but generally NOT to self-funded ERISA plans (large employer plans).

ERISA Appeal Rights

-The Employee Retirement Income Security Act (ERISA) governs most employer-sponsored health plans and provides specific appeal rights.
-You have 180 days from the date of denial to file an internal appeal.
-The insurer must respond to urgent care appeals within 72 hours and standard appeals within 30-60 days.
-You are entitled to receive the complete claim file, including the medical criteria used for the denial.
-After exhausting internal appeals, you have the right to an external (independent) review by a neutral third party.
-External review decisions are binding on the insurer -- if overturned, they must cover the claim.
-Keep meticulous records of every call, letter, and submission with dates and reference numbers.

Financial Assistance Resources

The financial burden of invisible illness is staggering. These programs can help reduce out-of-pocket costs for medications, treatments, and related expenses.

Patient Assistance Programs

NeedyMeds

Database of over 5,000 patient assistance programs for prescription medications, including those used for Lyme, fibromyalgia, and autoimmune conditions.

needymeds.org

RxAssist

Comprehensive directory of pharmaceutical manufacturer patient assistance programs with eligibility guidelines and application links.

rxassist.org

Patient Advocate Foundation Co-Pay Relief

Provides direct co-payment assistance for qualifying patients with specific diagnoses, including autoimmune and neurological conditions.

copays.org

Nonprofit Organizations

LymeDisease.org

Advocacy organization offering patient support, physician directories, and insurance navigation resources for Lyme patients.

lymedisease.org

Solve ME/CFS Initiative

Funds research and provides patient resources including insurance advocacy toolkits and disability application guidance.

solvecfs.org

Dysautonomia International

Provides physician directories, insurance appeal letter templates, and disability resources for POTS and other forms of dysautonomia.

dysautonomiainternational.org

National Fibromyalgia Association

Offers educational resources, support group directories, and advocacy tools for fibromyalgia patients navigating the healthcare system.

fmaware.org

State Programs

State Health Insurance Assistance Programs (SHIP)

Free, unbiased health insurance counseling available in every state. Can help with Medicare, Medicaid, and marketplace plan navigation.

State Pharmaceutical Assistance Programs (SPAPs)

Many states offer supplemental prescription drug coverage beyond federal programs. Check your state's health department website.

Medicaid Waiver Programs

Home and community-based service waivers that may cover services not available through standard Medicaid, including home health aides and specialized therapies.

Copay Assistance

HealthWell Foundation

Provides financial assistance for copays, premiums, deductibles, and coinsurance for underinsured patients with chronic or life-altering conditions.

healthwellfoundation.org

The Assistance Fund (TAF)

Offers copay assistance for specific disease categories. Check their website for currently open disease funds.

tafcares.org

Good Days (formerly CDF)

Provides financial assistance for diagnostics, copays, travel, and treatment-related costs for qualifying chronic disease patients.

mygooddays.org

Denial Appeal Letter Template

Use this template as a starting point for your appeal letter. Customize the bracketed sections with your specific information. Always include supporting documentation.

Insurance Denial Appeal Letter

[Your Full Name]
[Your Address]
[City, State ZIP]
[Date]

[Insurance Company Name]
[Appeals Department]
[Address]
[City, State ZIP]

RE: Appeal of Claim Denial
Member ID: [Your Member ID]
Claim Number: [Claim Number]
Date of Service: [Date]
Provider: [Provider Name]

Dear Appeals Review Committee:

I am writing to formally appeal the denial of coverage for [specific treatment/service/medication] under claim number [claim number], dated [date of denial letter]. The stated reason for denial was [quote the exact denial reason from the letter].

CLINICAL JUSTIFICATION:

I have been diagnosed with [condition] (ICD-10: [code]) by [diagnosing provider name and credentials]. My diagnosis is supported by the following objective findings:

1. [Lab result, imaging finding, or clinical test with date]
2. [Additional supporting evidence]
3. [Additional supporting evidence]

The requested [treatment/service] is medically necessary because:

1. [Explain why this treatment is needed]
2. [Reference failed prior treatments and dates]
3. [Cite clinical guidelines supporting this treatment]

PRIOR TREATMENT HISTORY:

I have previously attempted the following treatments without adequate response:
- [Treatment 1]: [Dates, duration, outcome]
- [Treatment 2]: [Dates, duration, outcome]
- [Treatment 3]: [Dates, duration, outcome]

SUPPORTING EVIDENCE:

Enclosed please find:
- Letter of medical necessity from [provider name]
- Relevant medical records and test results
- Peer-reviewed literature supporting the requested treatment
- [Applicable clinical practice guidelines]

LEGAL BASIS:

[If applicable: This claim falls under [state]'s Lyme disease coverage mandate, which requires insurers to cover physician-prescribed treatment without arbitrary duration limits.]

[If applicable: Under the Mental Health Parity and Addiction Equity Act, coverage limitations for this condition must be no more restrictive than those applied to medical/surgical conditions.]

Under [ERISA/state insurance law], I am entitled to a full and fair review of this denial. I request that the reviewer be a physician with expertise in [relevant specialty] who was not involved in the original denial decision.

I request a written response within [30/60] days as required by [applicable law]. If this appeal is denied, I intend to exercise my right to an external independent review.

Sincerely,
[Your Signature]
[Your Printed Name]
[Phone Number]
[Email Address]

Enclosures:
- Letter of Medical Necessity
- Medical Records
- Supporting Literature
- [Other documents]

Important Reminders for Insurance Navigation

-Always request denial decisions in writing with the specific clinical criteria and policy language used.
-Keep a log of every phone call with your insurer, including date, time, representative name, and reference number.
-File complaints with your state insurance commissioner if you believe your insurer is acting in bad faith.
-Consider consulting a patient advocate or health insurance attorney for complex cases or repeated denials.
-Never accept a verbal denial -- insist on written notification with appeal instructions.

Explore Related Modules

Advocacy Toolkit

Patient rights & letter templates

Provider Directory

Find specialists near you

Treatment Guide

Evidence-based treatment info

Data Sources (4)

Centers for Medicare & Medicaid Services (CMS). Medicare Claims Processing Manual. 2026.
Kaiser Family Foundation. Employer Health Benefits Annual Survey. 2025.
National Association of Insurance Commissioners (NAIC). State Insurance Department Consumer Complaint Data. 2025.
Agency for Healthcare Research and Quality (AHRQ). Health Insurance Coverage and Access to Care. 2025.

Disclaimer: This page provides general informational guidance only and does not constitute legal, financial, or medical advice. Insurance coverage varies by plan, state, and employer. Always review your specific plan documents (Summary of Benefits and Coverage) and consult with a qualified professional for guidance on insurance disputes. Organization listings do not imply endorsement by InvisibleSignal.

Last updated: August 2026. Coverage information reflects general trends and may not apply to your specific plan.

Insurance & Coverage Navigator

Navigate insurance coverage for invisible illness diagnosis and treatment

$12,000/yr

Avg. Out-of-Pocket Cost

Average annual out-of-pocket spending for patients with invisible illnesses, including specialist visits, lab work, and treatments not covered by insurance.

34%

Specialist Referral Denial Rate

Percentage of specialist referral requests denied on initial submission for invisible illness conditions, often citing lack of medical necessity.

54%

Successful Appeal Rate

Percentage of denied claims that are overturned on appeal. More than half of all denials can be reversed with proper documentation and persistence.

Coverage Guides by Condition

6 conditions

Lyme Disease

A69.20A69.21A69.22A69.23A69.29

Typically Covered

-Initial diagnostic testing (ELISA, Western blot)
-Standard 2-4 week antibiotic course (doxycycline, amoxicillin)
-Initial specialist consultation
-Basic lab work (CBC, CMP, inflammatory markers)

Commonly Denied

-Extended antibiotic therapy beyond IDSA guidelines (>28 days)
-IV antibiotic therapy for persistent symptoms
-Specialty lab testing (IGeneX, DNA Connexions, Vibrant Wellness)
-Coinfection testing panels (Babesia, Bartonella, Ehrlichia)
-Hyperbaric oxygen therapy
-Integrative or functional medicine visits

Prior Authorization Tips

1.Document failed standard-duration therapy before requesting extensions.
2.Include peer-reviewed literature supporting prolonged treatment (ILADS guidelines).
3.Request that your provider use specific ICD codes for manifestations (A69.21-A69.29) rather than unspecified (A69.20).
4.Obtain a letter of medical necessity from an LLMD (Lyme-literate MD).

Appeal Strategy

ME/CFS (Myalgic Encephalomyelitis)

G93.32

Typically Covered

-Primary care and specialist diagnostic visits
-Blood work to rule out other conditions
-Sleep studies
-Basic physical therapy

Commonly Denied

-Tilt table testing for orthostatic intolerance
-Immunological panels beyond standard CBC
-Home health aide services
-Cognitive behavioral therapy framed as curative (vs. coping support)
-Off-label medications (low-dose naltrexone, Abilify)

Prior Authorization Tips

1.Use the updated ICD-10 code G93.32 -- older codes may trigger denials.
2.Document post-exertional malaise (PEM) with activity logs over 2+ weeks.
3.Include functional capacity evaluations from occupational therapy.
4.Reference the 2015 IOM report 'Beyond Myalgic Encephalomyelitis/Chronic Fatigue Syndrome'.

Appeal Strategy

Long COVID

U09.9B94.8

Typically Covered

-Post-COVID evaluation visits
-Pulmonary function testing
-Cardiac workup (echo, EKG, Holter monitor)
-Basic neuropsychological screening
-Physical therapy and pulmonary rehabilitation

Commonly Denied

-Autonomic function testing
-Comprehensive neuropsychological evaluation
-Long-term occupational therapy
-Off-label antivirals (Paxlovid extended courses)
-Hyperbaric oxygen therapy
-Specialized long COVID clinic visits out of network

Prior Authorization Tips

1.Document the initial COVID infection with test results or clinical diagnosis.
2.Use both U09.9 and organ-specific codes for each affected system.
3.Include timeline showing symptom persistence beyond 12 weeks.
4.Reference RECOVER trial findings and NIH long COVID guidance.

Appeal Strategy

Fibromyalgia

M79.7

Typically Covered

-Rheumatology evaluation
-FDA-approved medications (pregabalin, duloxetine, milnacipran)
-Physical therapy
-Basic lab work to rule out other conditions

Commonly Denied

-Trigger point injections beyond limited number per year
-Massage therapy and acupuncture
-IV ketamine or lidocaine infusions
-Extended pain management programs
-Compounded topical pain medications

Prior Authorization Tips

1.Document failed trials of FDA-approved medications before requesting alternatives.
2.Use functional pain scales (FIQ-R) to demonstrate severity.
3.Include documentation of sleep disturbance and cognitive symptoms alongside pain.
4.Request physical therapy as part of a multimodal treatment plan.

Appeal Strategy

POTS (Postural Orthostatic Tachycardia Syndrome)

I49.8G90.3

Typically Covered

-Tilt table testing (when pre-authorized)
-Cardiology evaluation
-Echocardiogram and Holter monitoring
-Fludrocortisone and midodrine prescriptions

Commonly Denied

-Autonomic function testing panels
-IV saline infusion therapy
-Compression garment prescriptions
-Repeat tilt table testing
-Out-of-network dysautonomia specialists

Prior Authorization Tips

1.Obtain standing vs. supine vitals documented over multiple visits showing HR increase of 30+ bpm.
2.Use both cardiac (I49.8) and neurological (G90.3) codes to capture the full clinical picture.
3.Request tilt table testing through cardiology rather than neurology for better approval rates.
4.Include documentation of syncope or pre-syncope episodes with dates and witnesses.

Appeal Strategy

Alpha-gal Syndrome

T78.1T63.481A

Typically Covered

-Allergist/immunologist evaluation
-Alpha-gal sIgE blood testing
-Epinephrine auto-injector prescriptions
-Emergency department visits for anaphylaxis

Commonly Denied

-Repeat alpha-gal antibody level monitoring
-Dietitian consultations for mammalian meat avoidance
-Medication screening for mammalian-derived inactive ingredients
-Extended allergist follow-up visits

Prior Authorization Tips

1.Document tick bite history and timeline of symptom onset.
2.Include lab results showing elevated alpha-gal sIgE levels.
3.Note any anaphylactic reactions with ED records.
4.Request dietitian referral under medical nutrition therapy benefit.

Appeal Strategy

Know Your Rights

Mental Health Parity Act

-The Mental Health Parity and Addiction Equity Act (MHPAEA) requires insurers to cover mental health and substance use disorders at parity with medical/surgical benefits.
-Many invisible illnesses have comorbid anxiety, depression, and PTSD -- these must be covered without more restrictive limitations than physical health conditions.
-If your plan covers outpatient medical visits with a $30 copay, it cannot charge a $50 copay for mental health visits.
-Request a parity compliance analysis from your insurer if you suspect unequal treatment of mental health claims.

ACA Essential Health Benefits

-The Affordable Care Act requires marketplace and expanded Medicaid plans to cover 10 essential health benefit categories.
-Relevant categories include: ambulatory services, hospitalization, prescription drugs, rehabilitative services, lab services, preventive and wellness services, and mental health services.
-Insurers cannot impose annual or lifetime dollar limits on essential health benefits.
-Preventive services must be covered without cost-sharing, including certain screenings relevant to invisible illness diagnosis.
-Pre-existing condition exclusions are prohibited -- insurers cannot deny coverage for Lyme, ME/CFS, or any chronic condition.

State Lyme Disease Mandates

-Connecticut (2009): Requires insurers to cover long-term antibiotic treatment for Lyme disease when prescribed by a licensed physician.
-New York: Insurance law requires coverage for diagnosis and treatment of Lyme disease without arbitrary treatment duration limits.
-Virginia (2013): Prohibits insurers from denying coverage for long-term antibiotic therapy for Lyme disease.
-Massachusetts, New Hampshire, Maine, Minnesota, Rhode Island: Have enacted varying levels of Lyme coverage protections.
-Check your state's insurance department website for current mandates -- new legislation is introduced regularly.
-State mandates apply to state-regulated plans but generally NOT to self-funded ERISA plans (large employer plans).

ERISA Appeal Rights

-The Employee Retirement Income Security Act (ERISA) governs most employer-sponsored health plans and provides specific appeal rights.
-You have 180 days from the date of denial to file an internal appeal.
-The insurer must respond to urgent care appeals within 72 hours and standard appeals within 30-60 days.
-You are entitled to receive the complete claim file, including the medical criteria used for the denial.
-After exhausting internal appeals, you have the right to an external (independent) review by a neutral third party.
-External review decisions are binding on the insurer -- if overturned, they must cover the claim.
-Keep meticulous records of every call, letter, and submission with dates and reference numbers.

Financial Assistance Resources

The financial burden of invisible illness is staggering. These programs can help reduce out-of-pocket costs for medications, treatments, and related expenses.

Patient Assistance Programs

NeedyMeds

Database of over 5,000 patient assistance programs for prescription medications, including those used for Lyme, fibromyalgia, and autoimmune conditions.

needymeds.org

RxAssist

Comprehensive directory of pharmaceutical manufacturer patient assistance programs with eligibility guidelines and application links.

rxassist.org

Patient Advocate Foundation Co-Pay Relief

Provides direct co-payment assistance for qualifying patients with specific diagnoses, including autoimmune and neurological conditions.

copays.org

Nonprofit Organizations

LymeDisease.org

Advocacy organization offering patient support, physician directories, and insurance navigation resources for Lyme patients.

lymedisease.org

Solve ME/CFS Initiative

Funds research and provides patient resources including insurance advocacy toolkits and disability application guidance.

solvecfs.org

Dysautonomia International

Provides physician directories, insurance appeal letter templates, and disability resources for POTS and other forms of dysautonomia.

dysautonomiainternational.org

National Fibromyalgia Association

Offers educational resources, support group directories, and advocacy tools for fibromyalgia patients navigating the healthcare system.

fmaware.org

State Programs

State Health Insurance Assistance Programs (SHIP)

Free, unbiased health insurance counseling available in every state. Can help with Medicare, Medicaid, and marketplace plan navigation.

State Pharmaceutical Assistance Programs (SPAPs)

Many states offer supplemental prescription drug coverage beyond federal programs. Check your state's health department website.

Medicaid Waiver Programs

Home and community-based service waivers that may cover services not available through standard Medicaid, including home health aides and specialized therapies.

Copay Assistance

HealthWell Foundation

Provides financial assistance for copays, premiums, deductibles, and coinsurance for underinsured patients with chronic or life-altering conditions.

healthwellfoundation.org

The Assistance Fund (TAF)

Offers copay assistance for specific disease categories. Check their website for currently open disease funds.

tafcares.org

Good Days (formerly CDF)

Provides financial assistance for diagnostics, copays, travel, and treatment-related costs for qualifying chronic disease patients.

mygooddays.org

Denial Appeal Letter Template

Use this template as a starting point for your appeal letter. Customize the bracketed sections with your specific information. Always include supporting documentation.

Insurance Denial Appeal Letter

[Your Full Name]
[Your Address]
[City, State ZIP]
[Date]

[Insurance Company Name]
[Appeals Department]
[Address]
[City, State ZIP]

RE: Appeal of Claim Denial
Member ID: [Your Member ID]
Claim Number: [Claim Number]
Date of Service: [Date]
Provider: [Provider Name]

Dear Appeals Review Committee:

I am writing to formally appeal the denial of coverage for [specific treatment/service/medication] under claim number [claim number], dated [date of denial letter]. The stated reason for denial was [quote the exact denial reason from the letter].

CLINICAL JUSTIFICATION:

I have been diagnosed with [condition] (ICD-10: [code]) by [diagnosing provider name and credentials]. My diagnosis is supported by the following objective findings:

1. [Lab result, imaging finding, or clinical test with date]
2. [Additional supporting evidence]
3. [Additional supporting evidence]

The requested [treatment/service] is medically necessary because:

1. [Explain why this treatment is needed]
2. [Reference failed prior treatments and dates]
3. [Cite clinical guidelines supporting this treatment]

PRIOR TREATMENT HISTORY:

I have previously attempted the following treatments without adequate response:
- [Treatment 1]: [Dates, duration, outcome]
- [Treatment 2]: [Dates, duration, outcome]
- [Treatment 3]: [Dates, duration, outcome]

SUPPORTING EVIDENCE:

Enclosed please find:
- Letter of medical necessity from [provider name]
- Relevant medical records and test results
- Peer-reviewed literature supporting the requested treatment
- [Applicable clinical practice guidelines]

LEGAL BASIS:

[If applicable: This claim falls under [state]'s Lyme disease coverage mandate, which requires insurers to cover physician-prescribed treatment without arbitrary duration limits.]

[If applicable: Under the Mental Health Parity and Addiction Equity Act, coverage limitations for this condition must be no more restrictive than those applied to medical/surgical conditions.]

Under [ERISA/state insurance law], I am entitled to a full and fair review of this denial. I request that the reviewer be a physician with expertise in [relevant specialty] who was not involved in the original denial decision.

I request a written response within [30/60] days as required by [applicable law]. If this appeal is denied, I intend to exercise my right to an external independent review.

Sincerely,
[Your Signature]
[Your Printed Name]
[Phone Number]
[Email Address]

Enclosures:
- Letter of Medical Necessity
- Medical Records
- Supporting Literature
- [Other documents]

Important Reminders for Insurance Navigation

-Always request denial decisions in writing with the specific clinical criteria and policy language used.
-Keep a log of every phone call with your insurer, including date, time, representative name, and reference number.
-File complaints with your state insurance commissioner if you believe your insurer is acting in bad faith.
-Consider consulting a patient advocate or health insurance attorney for complex cases or repeated denials.
-Never accept a verbal denial -- insist on written notification with appeal instructions.

Explore Related Modules

Advocacy Toolkit

Patient rights & letter templates

Provider Directory

Find specialists near you

Treatment Guide

Evidence-based treatment info

Data Sources (4)

Centers for Medicare & Medicaid Services (CMS). Medicare Claims Processing Manual. 2026.
Kaiser Family Foundation. Employer Health Benefits Annual Survey. 2025.
National Association of Insurance Commissioners (NAIC). State Insurance Department Consumer Complaint Data. 2025.
Agency for Healthcare Research and Quality (AHRQ). Health Insurance Coverage and Access to Care. 2025.

Last updated: August 2026. Coverage information reflects general trends and may not apply to your specific plan.

Insurance & Coverage Navigator

Key Statistics

Coverage Guides by Condition

Know Your Rights

Financial Assistance Resources

Denial Appeal Letter Template

Explore Related Modules

Insurance & Coverage Navigator

Key Statistics

Coverage Guides by Condition

Know Your Rights

Financial Assistance Resources

Denial Appeal Letter Template

Explore Related Modules