What is OHIP billing code G804?

G804 is "Hyperbaric oxygen therapy - first 1/4 hour - outside chamber", an OHIP Diagnostic and Therapeutic Procedures code from the Ontario Schedule of Benefits (Physician Services).

How much does G804 pay?

The current OHIP fee for G804 is $71.85, effective 2025-04-01, per the Ontario Schedule of Benefits.

How do I bill G804 to OHIP?

G804 is submitted through OHIP's MCEDT claims system, either directly or via billing software. SnapBill validates G804 claims against the Schedule of Benefits rules before submission.

What codes are related to G804?

Codes related to G804 in the Schedule of Benefits include G800, G801, G802, G805.

All codes

G804

G804 – Hyperbaric oxygen therapy - first 1/4 hour - outside chamber

OHIP Diagnostic and Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits

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Hyperbaric Oxygen Therapy (HBOT) is the service rendered when a physician administers and supervises HBOT. The specific elements of HBOT are those of an assessment, including ongoing monitoring of the patient's condition and intervening as appropriate. G804 is payable for the first 1/4 hour of a session per patient, where the physician is supervising from within the hyperbaric unit but is not inside the chamber with the patient(s). Time is calculated based on the period of physician supervision while each patient receives HBOT. See G805 for subsequent time.

The service is eligible for payment only if the start and stop times of the service are recorded in each patient's permanent medical record.

G800 G801 G802 G805

HBOT is insured only for the treatment of those internationally recognized indications approved by the ministry.

HBOT is only eligible for payment for idiopathic sudden sensorineural hearing loss (ISSHL) when the following conditions are met: - a. The patient is treated concurrently with corticosteroid unless corticosteroids are contraindicated; - b. The treatment is initiated within 30 days of a diagnosis of ISSHL; and - c. The diagnosis of ISSHL is made or confirmed by an Otolaryngologist prior to the initiation of treatment.

HBOT is only eligible for payment for avascular necrosis (AVN) of bone following diagnostic imaging confirmation of symptomatic early to mid-stage AVN, e.g. Ficat stage I, II, or III or equivalent.

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