Summary & Overview
HCPCS C1300: Hyperbaric Oxygen in Full-Body Chamber, per 30 Minutes
HCPCS Level II code C1300 denotes hyperbaric oxygen therapy provided in a full-body chamber and billed per 30-minute interval. This code is nationally relevant as HBOT is used for a range of indications—such as certain non-healing wounds, radiation injuries, and selected ischemic conditions—and reimbursement rules for interval-based billing affect access, session structuring, and facility revenue across payers. Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will learn what the code represents, which settings typically deliver the service, and how the interval-based billing unit interacts with clinical session length. The publication provides benchmarks and comparative policy context for major commercial payers and Medicare, highlights common documentation and authorization considerations tied to interval billing, and summarizes clinical context for when full-body HBOT sessions are typically prescribed. Where payer-specific coverage policies or reimbursement benchmarks are available, the content will compare approaches to prior authorization, allowed units per episode, and coding precision for interval-based HBOT services. Data not available in the input will be noted where applicable.
Billing Code Overview
HCPCS Level II code C1300 describes hyperbaric oxygen therapy (HBOT) administered in a full-body chamber, billed per 30-minute interval. The service type is hyperbaric oxygen therapy, delivered using a full body hyperbaric chamber where the patient receives 100% oxygen at pressures greater than atmospheric pressure. The typical site of service is an outpatient hyperbaric facility or hospital-based hyperbaric unit, where sessions are scheduled in timed intervals to reflect ongoing treatment duration.
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Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with a chronic, non-healing wound such as a diabetic foot ulcer, refractory osteoradionecrosis, or refractory soft tissue radionecrosis referred to a hyperbaric oxygen (HBO) facility. The patient arrives to an outpatient hyperbaric suite or hospital-based hyperbaric medicine unit for a planned course of C1300 therapy. Intake includes verification of indications, consent, and pre-treatment evaluation by a hyperbaric medicine physician or qualified clinician. Vital signs and a focused history (including recent chemotherapy, pneumothorax history, claustrophobia, and pulmonary status) are reviewed. The patient is assisted into a full-body monoplace chamber or a multiplace chamber depending on facility capability and staffing.
During treatment, the chamber is pressurized to the prescribed atmospheric pressure (commonly 2.0–2.5 ATA) while the patient breathes 100% oxygen for the therapeutic period. Monitoring during each C1300 30-minute interval includes observation for barotrauma, oxygen toxicity symptoms, and claustrophobic distress. Nursing or hyperbaric technologist documents start and stop times, any interruptions, and patient tolerance. Typical course ranges from 20 to 40 treatments delivered once daily, five days per week, depending on indication and clinical response. Post-treatment, the clinician documents skin and wound status changes, any adverse events, and schedules subsequent sessions or follow-up care.
Coding Specifications
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