Hyperbaric Oxygen Therapy (HBOT) Clinical Coverage Criteria
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Clinical coverage criteria and prior authorization requirements for hyperbaric oxygen therapy across Fallon Health products, including Medicare Advantage, MassHealth ACO, and select plan lines; describes covered indications, exclusions, coding guidance, and use of InterQual criteria for medical necessity determinations.
Effective for dates of service on or after August 1, 2024, Fallon Health will use InterQual® Criteria when making medical necessity determinations for hyperbaric oxygen therapy.
Fallon Health updated Medicare and MassHealth information in the Policy section and adopted InterQual criteria during the 07/02/2024 annual review.
Coverage and Medical Necessity Criteria
inv-01: Covered Indications and Conditions
Covered when treatment is provided in a chamber and meets condition-specific criteria:
See child node for diabetic wound specifics
inv-02: Diabetic Lower Extremity Wounds Specific Criteria
Covered when ALL of the following are met:
HBOT must be adjunctive to ongoing standard wound care (vascular assessment/correction, nutrition and glucose optimization, debridement, moist wound care, appropriate off‑loading, and infection management). Wounds must be evaluated at least every 30 days; continued HBOT is not covered if measurable healing is not demonstrated within any 30‑day period.
Topical oxygen therapies and devices are explicitly excluded from coverage. Topical oxygen therapy (A4575, E0446) and any professional services related to this therapy will be denied as not reasonable and necessary and are not covered under this policy.
Coverage for services described in this policy varies by product and employer group. Before scheduling or delivering HBOT services, verify the member's benefit plan and Evidence of Coverage. If a member's benefit plan excludes a service, the plan provisions govern; state mandates and federal mandates may supersede plan language where applicable.
Mild hyperbaric oxygen therapy and topical HBOT are considered investigational and are not covered. Mild hyperbaric oxygen therapy (pressures < 1.5 ATA) is classified as unproven for clinical effectiveness and therefore not covered. Topical hyperbaric oxygen therapy (localized delivery of 100% oxygen to a wound or area) likewise lacks sufficient evidence from randomized controlled trials and is not covered.
Billing Codes and Units
Authorization, Documentation, and Operational Guidance
Prior authorization required; InterQual required for medical necessity
Prior authorization is required for non-emergent hyperbaric oxygen therapy; Fallon Health uses InterQual® Criteria (adult and pediatric Hyperbaric Oxygen Therapy) for medical necessity determinations effective August 1, 2024. Emergency hyperbaric treatments do not require prior authorization, but post-stabilization HBOT requires prior authorization.
- Reference InterQual® CP: Procedures, Hyperbaric Oxygen Therapy (adult and pediatric) in effect on date of service.
- Facility accreditation by UHMS is expected per FDA guidance.
Check member benefit and obtain authorization if required
Verify the member’s Evidence of Coverage and plan-specific rules before scheduling HBOT; prior authorization or confirmation of coverage may be required because coverage varies by product and benefit plan.
- Consult the product’s Evidence of Coverage for exclusions or benefit limitations.
- If the benefit plan excludes the service, claims may be denied regardless of medical necessity.
Step requirement for diabetic lower extremity wounds — minimum 30 days of standard therapy
For diabetic lower extremity wounds, HBOT is covered only after failure of an adequate course of standard wound therapy — defined as no measurable signs of healing for at least 30 consecutive days; HBOT must be adjunctive to ongoing standard wound care.
- Standard wound care components (vascular assessment/correction, nutrition, glucose control, debridement, moist dressings, offloading, infection control) must be provided.
- Wounds must be evaluated at least every 30 days; continued HBOT is not covered if no measurable healing within any 30-day period.
Internal coverage criteria may be created when Medicare criteria are not fully established
When applicable Medicare statutes, NCDs or LCDs do not fully establish coverage criteria, Fallon Health may create internal coverage criteria under 42 C.F.R. § 422.101(b)(6)(i) and (ii); NaviCare follows Medicare NCDs/LCDs first and then MassHealth criteria if Medicare criteria are not met.
- Fallon Health may establish internal criteria in absence of Medicare guidance.
- NaviCare and MassHealth follow-the-leader approach: Medicare NCDs/LCDs first, then MassHealth guidelines if needed.
Prior authorization and documentation expectations; emergency and post‑stabilization guidance
Document medical necessity per InterQual and Fallon Health requirements when requesting prior authorization; emergency HBOT does not require prior authorization but post-stabilization HBOT does and should be documented accordingly.
- Submit documentation showing diagnosis, prior standard wound care (when applicable), treatment dates and wound evaluations every 30 days.
- For emergency care, retain documentation of stabilization and submit authorization requests for post-stabilization services.
Comply with Medicare, MassHealth, NaviCare and PACE rules when making coverage determinations
Follow applicable Medicare NCDs and LCDs and Medicare statutes/regulations for Medicare Advantage members; follow MassHealth Medical Necessity Guidelines for MassHealth members when available; PACE services must be authorized by the interdisciplinary team.
- If Medicare criteria are absent or not met for NaviCare members, MassHealth guidelines are applied.
- Consult product Evidence of Coverage for plan-specific rules and applicable state mandates.
Non-listed indications are not covered and may be denied
All indications not specifically listed among the covered conditions in the policy are considered non-covered and may be denied under Medicare and Fallon Health policy.
- Examples of excluded uses include decubitus ulcers, Lyme disease, migraine, CRPS, fibromyalgia, cerebral palsy, autism, chronic fatigue syndrome, and prevention of mandibular osteoradionecrosis.
- If an indication is not on the listed covered conditions, request prior authorization only with supporting clinical rationale and be prepared for possible denial.
Benefit-plan coverage limitation — verify plan-specific exclusions
Not all services in this policy are covered for all products or employer groups; check the member’s benefit plan Evidence of Coverage because the plan provisions govern when they differ from this policy.
- Coverage depends on the terms of the member’s specific benefit plan and any applicable state or federal mandates.
- Claims may be denied if the member’s benefit plan excludes the service despite medical necessity per policy.
Clinical Background
Hyperbaric oxygen therapy is delivered in accredited, hard-sided chambers and uses medical-grade oxygen under increased ambient pressure. Typical treatment pressures for standard HBOT are within the range used in practice (commonly between approximately 1.9 to 3.0 ATA), and treatments are prescribed and supervised by appropriately trained physicians in accredited facilities.
Key Terms and Device Types
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