Does Insurance Cover Hyperbaric Oxygen Therapy? Medicare, Medicaid & Private Plans

Yes, insurance covers hyperbaric oxygen therapy for 14 FDA-approved conditions, with Medicare Part B paying 80% of the approved amount after a $257 annual deductible. For off-label uses like Long COVID, TBI, or anti-aging, most insurers deny coverage, leaving patients to pay $200 to $400 per session out of pocket. This guide breaks down exactly what each type of insurance covers, how to get approval, and what to do when your claim is denied.

If you have been told you need hyperbaric oxygen therapy, your first question is probably about cost. And right behind it: "Will my insurance pay for this?"

The answer depends on three things: your diagnosis, your insurance type, and how well your doctor documents the medical necessity. For some patients, insurance covers nearly everything. For others, it covers nothing.

Here is what you need to know before your first call to your insurance company.

Which conditions does insurance cover for hyperbaric oxygen therapy?

Insurance coverage starts with FDA approval. The FDA has cleared hyperbaric oxygen therapy for 14 specific medical conditions, and most insurance companies, including Medicare, use this list as their baseline for coverage decisions.

The 14 FDA-approved indications include:

• Diabetic foot ulcers (Wagner grade III or higher)
• Chronic non-healing wounds
• Radiation injury (delayed radiation tissue damage)
• Carbon monoxide poisoning
• Decompression sickness (the bends)
• Gas gangrene (clostridial myonecrosis)
• Crush injuries and acute traumatic ischemia
• Air or gas embolism
• Necrotizing soft tissue infections
• Osteomyelitis (refractory bone infection)
• Compromised skin grafts and flaps
• Thermal burns
• Actinomycosis (chronic bacterial infection)
• Intracranial abscess

If your condition is on this list, your chances of getting insurance coverage are strong. According to the Undersea & Hyperbaric Medical Society (UHMS), these indications have sufficient clinical evidence to support medical necessity.

What about off-label conditions? Hyperbaric oxygen therapy is also used for conditions like Long COVID, traumatic brain injury, autism spectrum disorder, Lyme disease, and anti-aging. These are not currently FDA-approved indications, which means most insurance plans will not cover treatment. Some patients have successfully appealed denials for off-label uses by providing clinical research, but approval rates remain low.

You can browse conditions treated with hyperbaric oxygen therapy to see which ones have the strongest clinical evidence behind them.

How Medicare covers hyperbaric oxygen therapy

Medicare is the largest single payer for hyperbaric oxygen therapy in the United States. If you are 65 or older, or qualify for Medicare through disability, here is how coverage works.

Medicare Part B coverage details

Medicare Part B covers hyperbaric oxygen therapy as an outpatient procedure under National Coverage Determination (NCD) 20.29. Coverage applies to all 14 FDA-approved conditions listed above.

Here is what Medicare typically pays:

Cost Component	Amount
Medicare Part B pays	80% of approved amount
Patient coinsurance	20% of approved amount
Annual deductible (2025)	$257
Typical per-session copay	$50-$100
Average total patient cost (40 sessions)	$2,000-$4,000

The CPT code for hyperbaric oxygen therapy is 99183 (physician supervision), and the facility code is HCPCS G0277. Your provider will bill these codes to Medicare.

How many sessions does Medicare approve?

Medicare does not set a hard limit on the number of sessions. However, most treatment protocols call for 20 to 40 sessions, and Medicare may require additional documentation to justify treatment beyond 30 sessions.

For diabetic wound care, Medicare typically approves an initial course of 30 sessions at 2.0 to 2.4 ATA. If the wound shows measurable improvement, additional sessions may be authorized.

Consider Robert, a 68-year-old retired teacher with a diabetic foot ulcer that would not heal after four months of standard wound care. His doctor recommended 30 sessions of hyperbaric oxygen therapy. Medicare Part B covered 80% of the cost. Robert's out-of-pocket expenses totaled about $2,400 in coinsurance over six weeks. After 28 sessions, his wound closed completely.

A 2024 analysis of Medicare claims data published in PubMed found that the average per-patient cost of hyperbaric oxygen therapy billed to Medicare was $16,088 for a standard treatment course, with a median of 34 sessions.

Medicare Advantage plans

If you have a Medicare Advantage plan (Part C), your coverage for hyperbaric oxygen therapy should be at least as broad as Original Medicare. However, Medicare Advantage plans may have additional requirements:

• Network restrictions: You may need to use in-network providers
• Prior authorization: Most Advantage plans require pre-approval
• Referral requirements: Some plans require a referral from your primary care physician

Check with your specific plan before starting treatment. You can search for hyperbaric oxygen therapy clinics to find providers near you and ask which insurance plans they accept.

Medicaid coverage for hyperbaric oxygen therapy

Medicaid coverage for hyperbaric oxygen therapy varies significantly by state. Unlike Medicare, which has a uniform national policy, each state's Medicaid program sets its own coverage rules.

What most state Medicaid programs cover

Most state Medicaid programs cover hyperbaric oxygen therapy for the same 14 FDA-approved conditions that Medicare covers. However, there are important differences:

• Prior authorization is almost always required
• Session limits may be stricter than Medicare (some states cap at 20-30 sessions)
• Provider restrictions may limit treatment to hospital-based facilities
• Documentation requirements may be more extensive

How Medicaid coverage works in practice

Take Maria, a 45-year-old home health aide in Texas with Medicaid coverage. She developed a non-healing surgical wound after an abdominal procedure. Her doctor submitted a prior authorization request with wound measurements, photos, and documentation showing that standard wound care had failed after 30 days. Texas Medicaid approved 20 sessions. Maria's treatment was fully covered with no out-of-pocket costs.

Contact your state Medicaid office or ask your hyperbaric clinic about Medicaid acceptance in your area.

Private insurance coverage: what major plans pay for

Private insurance companies generally follow the same FDA-approved conditions list for coverage decisions, but policies vary between insurers, plan types, and even individual employers.

Major insurer policies at a glance

Insurer	Covers FDA-Approved?	Key Requirements
UnitedHealthcare	Yes	Prior auth required; wound must fail standard care first
Blue Cross Blue Shield	Yes (varies by state)	Check specific state plan; prior auth typically required
Aetna	Yes	Prior auth; documentation of failed standard therapy needed
Cigna	Yes	Prior auth; physician referral required
Humana	Yes	Prior auth; may require in-network provider

What private insurance typically requires

To get private insurance to cover hyperbaric oxygen therapy, you generally need:

1. A diagnosis on the FDA-approved list
2. Documentation that standard treatment has failed (typically 30 days of conventional wound care)
3. Prior authorization from your insurer
4. A prescription or referral from a qualified physician
5. Treatment at an approved facility (often must be hospital-based or UHMS-accredited)

Employer-sponsored plans

Large employer plans may have different coverage than individual marketplace plans, even from the same insurer. Always check your specific plan's Summary of Benefits to confirm hyperbaric oxygen therapy coverage.

Patricia, a 55-year-old marketing executive with Blue Cross Blue Shield through her employer, had delayed radiation tissue damage after breast cancer treatment. Her radiation oncologist wrote a detailed letter of medical necessity citing her specific symptoms and the clinical evidence for hyperbaric oxygen therapy in radiation injury. BCBS approved 40 sessions. After meeting her $1,500 deductible, Patricia paid a 20% coinsurance, totaling about $3,200 out of pocket for a treatment that billed at $16,000.

How to get insurance approval for hyperbaric oxygen therapy

Getting insurance approval often requires persistence and thorough documentation. Here is a step-by-step process that can improve your chances.

Step 1: Verify your benefits

Call the number on the back of your insurance card and ask specifically about hyperbaric oxygen therapy coverage. Request:

• Confirmation that hyperbaric oxygen therapy is a covered benefit under your plan
• Prior authorization requirements and timeline
• In-network providers in your area
• Expected cost-sharing (copay, coinsurance, deductible)
• Session limits if any

Step 2: Get a letter of medical necessity

Your prescribing physician should write a letter that includes:

• Your specific diagnosis with ICD-10 codes
• Why hyperbaric oxygen therapy is medically necessary for your condition
• Documentation that standard treatments have been tried and failed
• The proposed treatment protocol (number of sessions, pressure, frequency)
• Supporting clinical evidence or UHMS guidelines

Step 3: Submit prior authorization

Your hyperbaric clinic or physician's office will typically handle the prior authorization submission. This process usually takes 5 to 15 business days. Ask your clinic if they have an insurance coordinator who handles authorizations.

Step 4: Appeal if denied

If your initial request is denied, you have the right to appeal. Insurance denial appeals for hyperbaric oxygen therapy can succeed when supported by strong clinical documentation. Your appeal should include:

• The original letter of medical necessity (updated if needed)
• Additional clinical evidence supporting treatment for your condition
• Peer-reviewed studies relevant to your diagnosis
• A letter from your treating physician explaining why alternatives are insufficient

Many hyperbaric clinics have insurance specialists on staff. When searching for clinics on FindHBOT, ask whether they offer insurance assistance.

Paying out of pocket: FSA, HSA, and other options

When insurance does not cover hyperbaric oxygen therapy, patients have several options to manage costs.

HSA and FSA accounts

Hyperbaric oxygen therapy is generally eligible for Health Savings Account (HSA) and Flexible Spending Account (FSA) reimbursement when prescribed by a physician, even for off-label uses. You will need:

• A written prescription or letter of medical necessity from your doctor
• Itemized receipts from the hyperbaric clinic
• The clinic's tax ID number

This effectively reduces your cost by your marginal tax rate. If you are in the 24% tax bracket, using HSA funds saves you 24% on every session.

Package discounts and payment plans

Most independent hyperbaric clinics offer discounted rates for patients paying out of pocket:

Payment Option	Typical Savings
Cash pay (per session)	10-20% off list price
Package of 10 sessions	15-25% discount
Package of 20+ sessions	20-30% discount
Monthly payment plan	0% interest at many clinics

The average out-of-pocket cost for a single session is $200 to $400 at independent clinics, compared to $300 to $2,500 at hospital-based programs. You can compare options by browsing hyperbaric oxygen therapy clinics near you.

For detailed pricing data from real clinics, see our complete guide to hyperbaric oxygen therapy costs.

Medical financing and tax deductions

CareCredit and Prosper Healthcare Lending offer medical financing with promotional 0% APR periods (typically 6 to 24 months) for qualified patients. Many hyperbaric clinics accept these financing options.

If your total medical expenses exceed 7.5% of your adjusted gross income, you can deduct hyperbaric oxygen therapy costs on your federal tax return. This applies even for off-label treatments prescribed by a doctor.

Frequently asked questions

Does Blue Cross Blue Shield cover hyperbaric oxygen therapy?

Most Blue Cross Blue Shield plans cover hyperbaric oxygen therapy for FDA-approved conditions like diabetic wound healing, radiation injury, and carbon monoxide poisoning. Coverage varies by state and plan type. Contact your specific BCBS plan to verify benefits, and expect to need prior authorization and documentation of failed standard treatment.

Can I use my HSA or FSA for hyperbaric oxygen therapy?

Yes. Hyperbaric oxygen therapy qualifies as an eligible medical expense for both HSA and FSA accounts when prescribed by a physician. You will need a written prescription or letter of medical necessity and itemized receipts from the clinic. This applies even for off-label uses that insurance will not cover.

How much does hyperbaric oxygen therapy cost without insurance?

Without insurance, a single session costs $200 to $400 at independent clinics and $300 to $2,500 at hospital-based programs. A full treatment course of 20 to 40 sessions runs $4,000 to $16,000 out of pocket. Many clinics offer package discounts of 15-30% for cash-paying patients.

Does Medicare cover hyperbaric oxygen therapy for wound care?

Yes. Medicare Part B covers hyperbaric oxygen therapy for diabetic wounds (Wagner grade III or higher) and other chronic non-healing wounds under NCD 20.29. Medicare pays 80% of the approved amount after the annual deductible ($257 in 2025). Most protocols authorize 30 sessions initially, with extensions available if the wound shows measurable improvement.

Will insurance cover hyperbaric oxygen therapy for Long COVID?

Currently, most insurance plans do not cover hyperbaric oxygen therapy for Long COVID because it is not an FDA-approved indication. Some patients have obtained coverage through appeals supported by clinical trial data, but approval rates remain low. Several randomized controlled trials have shown significant benefits, and future FDA review could change coverage policies.

Making an informed insurance decision

Insurance coverage for hyperbaric oxygen therapy comes down to one central question: is your condition on the FDA-approved list?

If it is, you have a strong path to coverage through Medicare, Medicaid, or private insurance. The key is thorough documentation, a clear letter of medical necessity, and persistence through the prior authorization process.

If your condition is not FDA-approved for hyperbaric treatment, you still have options. HSA and FSA accounts, clinic package discounts, medical financing, and tax deductions can all reduce the financial burden significantly.

Here are your next steps:

1. Check the list: Confirm whether your condition is FDA-approved for hyperbaric oxygen therapy
2. Call your insurer: Verify your specific plan's coverage and requirements
3. Find a clinic: Browse hyperbaric oxygen therapy clinics near you and ask about insurance assistance
4. Get documentation: Work with your doctor on a strong letter of medical necessity
5. Know your rights: If denied, appeal with clinical evidence and peer-reviewed research

Whatever your insurance situation, understanding your coverage options puts you in control of the decision.

Sources

1. Undersea & Hyperbaric Medical Society (UHMS) - Approved indications for hyperbaric oxygen therapy. uhms.org
2. Centers for Medicare & Medicaid Services - National Coverage Determination 20.29: Hyperbaric Oxygen Therapy. cms.gov
3. FDA - Hyperbaric Oxygen Therapy: Get the Facts. fda.gov
4. Medicare.gov - Hyperbaric oxygen therapy coverage details. medicare.gov
5. Cochrane Database of Systematic Reviews - Hyperbaric oxygen therapy for chronic wounds. cochranelibrary.com

This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting any treatment, including hyperbaric oxygen therapy.