CurrentBlue Cross Blue Shield - Rhode IslandPolicy N/A

Hyperbaric Oxygen Therapy (HBOT) Coverage Policy

This policy governs coverage and medical necessity determinations for systemic and topical hyperbaric oxygen therapy for Blue Cross Blue Shield - Rhode Island Medicare Advantage and Commercial products.

Policy Summary

PayerBlue Cross Blue Shield - Rhode Island

PolicyHyperbaric Oxygen Therapy (HBOT) Coverage Policy

Policy CodePolicy N/A

Change TypeNo material change

Effective DateOct 1, 2019

Next Review DateJan 1, 2025

Key ActionFile systemic HBOT claims with a covered ICD-10 diagnosis to ensure medical necessity and correct claim processing.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

2HBOT methods described

>=1Covered codes listed

2Topical HBOT codes not covered

YesDisclaimer present

Coverage Determinations

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Medically necessary — systemic HBOT with covered diagnosis: Hyperbaric oxygen therapy (systemic, whole-body) is medically necessary when filed with a covered indication for Medicare Advantage Plans and Commercial Products.filed with covered ICD-10 diagnosis

See 2025 Covered Diagnosis Code List for Hyperbaric Oxygen Therapy; the covered diagnosis must be filed on the claim line to ensure correct claim processing.

inv-02: Not covered / Not medically necessary — topical and other non-specified indications

Not covered or considered not medically necessary in the following situations:

Topical HBOT: Topical hyperbaric oxygen therapy (localized/topical systems) is not covered for Medicare Advantage Plans and is not medically necessary for Commercial Products due to insufficient evidence.N/A

Includes topical devices and supplies (HCPCS A4575, E0446).

Systemic HBOT for other indications: Systemic hyperbaric oxygen therapy for conditions other than those specified in this policy is not medically necessary because available studies do not demonstrate improved relevant outcomes.N/A

Policy references UHMS indications and evidence supporting specific indications; unspecified conditions are considered insufficient evidence.

The evidence supporting topical hyperbaric oxygen therapy is limited and consists primarily of case series, case reports, and small randomized trials with heterogeneous populations and regimens; the data are insufficient to determine net health outcome. Likewise, systemic HBOT for conditions other than those specifically listed in this policy lacks adequate evidence to demonstrate improved relevant outcomes and is therefore considered not medically necessary for unspecified indications.

CPT / HCPCS Coding

Medically necessary codes when filed with covered ICD-10 diagnosisCPT | HCPCSCovered

99183	Physician or other qualified health care professional attendance and supervision of hyperbaric oxygen therapy, per session
G0277	Hyperbaric oxygen under pressure, full body chamber, per 30 minute interval

Not covered / Not medically necessary codes (topical HBOT)HCPCSNot Covered

A4575	Topical hyperbaric oxygen chamber, disposable
E0446	Topical oxygen delivery system, not otherwise specified, includes all supplies and accessories

Provider Next Steps and Billing Guidance

Prior Authorization

Prior authorization is not required for hyperbaric oxygen therapy under this policy. Confirm any plan-specific requirements before scheduling.

Note

Verify Benefits and Eligibility

Verify member benefits and eligibility prior to providing services. Coverage, prior authorization requirements (if any), and member cost-sharing vary by contract and are determined by the member's subscriber agreement or employer agreement.

Check eligibility and benefit coverage via the provider portal or call the provider call center
Confirm whether hyperbaric oxygen therapy is a covered benefit for the member's specific plan and group

Step Therapy

Step therapy does not apply to hyperbaric oxygen therapy under this policy. If a plan-specific step therapy protocol exists, follow the requirements in the member's benefit plan.

Note

Benefits & Eligibility

Benefits & eligibility are governed by the member's contract. This policy is informational and not a guarantee of payment. For member-specific determinations, refer to the Benefit Booklet, Evidence of Coverage, or Subscriber Agreement and contact the provider call center as needed.

The member's subscriber agreement or employer agreement supersedes this medical policy
Contact the provider call center for benefit verification and pre-service inquiries

Denial Risk

Denial Risks for Topical HBOT and Uncoded Diagnoses

Denial risk: Topical hyperbaric oxygen therapy (A4575, E0446) is not covered for Medicare Advantage Plans and is not medically necessary for Commercial Products. Claims submitted with topical HBOT codes or without a covered ICD-10 diagnosis code may be denied or subject to member liability. Ensure the covered ICD-10 diagnosis is filed on the claim line for correct processing.

Affected codes: A4575, E0446 (topical oxygen devices) — not covered / not medically necessary
Ensure a covered ICD-10 diagnosis code is submitted on each claim line for hyperbaric oxygen therapy (see policy's covered diagnosis list)
Topical HBOT billed as full HBOT may be denied

Denial Risk

Denial / Member Liability

If services are determined to be not medically necessary or not a covered benefit for the member, providers may not bill the member unless the member has been informed in advance and agreed in writing to accept financial responsibility. Providers should confirm coverage and obtain any required authorizations or documentation prior to rendering services to avoid member liability.

Non-covered or not medically necessary services may result in denial and member financial responsibility if advance written consent is not obtained
For Medicare Advantage members, topical HBOT is not covered; for Commercial members, topical HBOT is not medically necessary

Clinical Background

Background: Hyperbaric oxygen therapy (HBOT) delivers 100% oxygen at elevated pressures by two primary methods. Systemic HBOT encloses the patient in a pressure chamber so oxygen is delivered systemically via the circulation and is used for selected systemic illnesses and specific wound indications. Topical HBOT delivers oxygen directly to an open, moist wound via an appliance that encloses the wound area at a pressure slightly above atmospheric pressure; evidence for topical approaches is limited and under investigation.

Definitions and Guideline References

Topical hyperbaric oxygen therapy

DefinitionTopical hyperbaric oxygen therapy: delivery of 100% oxygen directly to an open, moist wound via an appliance enclosing the wound area at a pressure slightly higher than atmospheric pressure; devices may be disposable and used in the home.

MechanismOxygen is applied locally (eg, extremity enclosed in an appliance or inflatable bag) so high concentrations diffuse into the wound to increase local cellular oxygen tension and promote healing.

Typical devicesAppliance to enclose the wound area plus oxygen source (conventional oxygen tanks may be used); appliances may be disposable and usable at home by trained patients.

Investigated indicationsSkin ulcerations from diabetes, venous stasis, postsurgical infection, gangrenous lesions, decubitus ulcers, amputations, skin grafts, burns, or frostbite.

Systemic hyperbaric oxygen therapy

DefinitionSystemic hyperbaric oxygen therapy: patient is entirely enclosed in a pressure chamber and breathes oxygen at pressures greater than 1 atmosphere, with oxygen delivered systemically to target tissues.

MechanismRelies on systemic circulation to deliver highly oxygenated blood to target sites; can be performed in monoplace (pure oxygen) or multiplace (compressed air plus oxygen by mask/head tent) chambers.

Typical pressuresHBOT involves breathing 100% oxygen at pressures between 1.5 and 3.0 atmospheres.

Common systemic indicationsSystemic illnesses such as air or gas embolism, carbon monoxide poisoning, and clostridial gas gangrene; and selected wound indications requiring systemic delivery of oxygen.

Clinical practice guideline references

Society for Vascular SurgeryThe management of diabetic foot: A clinical practice guideline by the Society for Vascular Surgery (Powers et al. referenced for diabetic foot management).

Undersea and Hyperbaric Medicine (UHMS)A clinical practice guideline for the use of hyperbaric oxygen therapy in the treatment of diabetic foot ulcers (Huang et al., 2015).

AHA/ASA Stroke GuidelinesGuidelines for the Early Management of Patients With Acute Ischemic Stroke: 2019 Update (Powers et al.).

Sudden Hearing Loss GuidelineClinical Practice Guideline: Sudden Hearing Loss (Update) (Chandrasekhar et al., 2019).