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TRICARE Undersea Medicine & HBOT Coverage Guide (2026)

Learn about TRICARE coverage for undersea medicine and HBOT in 2026. Covers rules for decompression sickness, wound care, and "off-label" exclusions.

TRICARE Undersea Medicine & HBOT Coverage Guide (2026)

TRICARE covers undersea medicine—primarily Hyperbaric Oxygen Therapy (HBOT)—when it is medically necessary to treat specific conditions like decompression sickness (the bends), carbon monoxide poisoning, or severe non-healing wounds. While the military has a long history with diving medicine, civilian TRICARE coverage is strictly limited to evidence-based treatments and does not cover "off-label" uses like treating autism or sports injuries.

*Note: TRICARE.Com is an independent reference site and is not the official TRICARE program or a government agency. For official policy, visit TRICARE.mil.*

In detail

Undersea medicine within the TRICARE system refers to the specialized diagnosis and treatment of conditions related to high-pressure environments. This is divided into two main categories: operational readiness for military divers/submariners and clinical **Hyperbaric Oxygen Therapy (HBOT)** for beneficiaries.

### Hyperbaric Oxygen Therapy (HBOT) Coverage TRICARE covers HBOT when a patient breathes 100% oxygen while inside a pressurized chamber. For the 2026 plan year, TRICARE covers this treatment for the following specific conditions:

* **Decompression Sickness:** Often called "the bends," caused by rapid decreases in pressure. * **Gas/Air Embolism:** Bubbles in the bloodstream. * **Carbon Monoxide Poisoning:** Including cyanide poisoning. * **Clostridial Myonecrosis:** Gas gangrene. * **Crush Injuries:** Acute traumatic peripheral ischemia. * **Progressive Necrotizing Infections:** Such as necrotizing fasciitis. * **Acute Peripheral Arterial Insufficiency:** Sudden loss of blood flow to limbs. * **Osteoradionecrosis:** Bone damage caused by radiation therapy. * **Non-healing Wounds:** Specifically diabetic wounds of the lower extremities that haven't responded to 30 days of standard care.

### The "Off-Label" Exclusion TRICARE is very strict about what it does *not* cover in undersea medicine. HBOT is considered "unproven" and **not covered** for: * Autism Spectrum Disorder * Traumatic Brain Injury (TBI) * Cerebral Palsy * Multiple Sclerosis * Stroke recovery * Chronic fatigue syndrome

### Costs and Access (2026 Rates) Costs depend on your plan and the setting (Inpatient vs. Outpatient). * **TRICARE Prime:** $0 out-of-pocket for active duty; small copayments (approx. $25–$37 per visit in 2026) for retirees at network providers. * **TRICARE Select:** Group A retirees generally pay a 25% cost-share of the contracted rate after the deductible is met. * **Authorization:** Most undersea medicine treatments require prior authorization from your regional contractor (**Humana Military** in the East; **TriWest Healthcare Alliance** in the West).

Who this applies to

* **Active Duty Divers and Submariners:** Undersea medicine is a matter of occupational health and operational readiness, usually managed by Navy Undersea Medical Officers (UMOs). * **Diabetic Beneficiaries:** Those with severe foot ulcers that have failed standard treatment may utilize undersea medicine (HBOT) to prevent amputation. * **Emergency Cases:** Any beneficiary suffering from life-threatening carbon monoxide poisoning or "the bends" following recreational diving. * **Cancer Survivors:** Beneficiaries dealing with late-stage tissue damage (radiation necrosis) from previous radiation treatments.

Common scenarios

**Scenario 1: The Recreational Diver.** An off-duty service member in Hawaii (West Region/TriWest) goes scuba diving and ascends too quickly, resulting in decompression sickness. They are rushed to a hyperbaric chamber. Because this is an emergency, TRICARE covers the treatment. For a TRICARE Prime member, the cost is $0.

**Scenario 2: The Diabetic Retiree.** A retiree in Florida (East Region/Humana Military) has a persistent Stage III diabetic foot ulcer. After 35 days of standard wound care with no improvement, their doctor requests HBOT. Humana Military approves a 30-session course. As a Select Group A retiree, they pay their annual deductible plus a 25% cost-share for the outpatient facility visits.

**Scenario 3: The Excluded Treatment.** A family seeks HBOT to treat their child's TBI symptoms. Because TRICARE deems HBOT for TBI "unproven/experimental," the claim is denied. The family would be responsible for 100% of the cost, which can exceed $300 per hour in a private clinic.

Related terms

* **Hyperbaric Oxygen Therapy (HBOT):** A treatment where the patient breathes 100% oxygen in a pressurized chamber to speed healing. * **Decompression Sickness:** A condition where nitrogen bubbles form in the body during rapid pressure changes. * **Undersea Medical Officer (UMO):** A specialized Navy physician trained in the effects of high pressure on the human body. * **Osteoradionecrosis:** Bone death caused by radiation, often treated with undersea medicine techniques. * **Prior Authorization:** A requirement to get your TRICARE regional contractor's approval before receiving non-emergency hyperbaric treatments.

Sources

* **TRICARE.mil - Hyperbaric Oxygen Therapy:** https://www.tricare.mil/CoveredServices/IsItCovered/HyperbaricOxygenTherapy * **Defense Health Agency (DHA) Policy Manuals:** https://manuals.health.mil/ * **TriWest Healthcare Alliance (West Region):** https://www.triwest.com * **Humana Military (East Region):** https://www.humanamilitary.com