What are the billing rules for G442A?

Advanced hearing tests pay nil unless the technical component is done by the otolaryngologist (or equivalent), or delegated to a CASLPO audiologist employed by that specialist or by a public hospital (J98). Delegated technical work must meet the General Preamble delegation rules (GP62, J98). Keep written records of your qualifications and those of staff you delegate to; without them the test pays nil (J98).

What is G442A often billed with?

G529 professional component (J99). G440/G525 or G441/G526 audiometry (J99).

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Billing code

G442A — Impedance audiometry – technical component

Q: What is OHIP billing code G442A?

Technical component of impedance audiometry (tympanometry), manual or automated; may include stapedial reflex and compliance testing.

Tympanometry, technical part

Bill G442 for performing impedance audiometry (tympanometry), manual or automated, which may include stapedial reflex or compliance testing.

Watch for: Pays nil unless done by the otolaryngologist or an eligible audiologist, with written records of qualifications kept.

Provider	Specialist	Assistant	Anaesthetist	Non-anaesthetist
$3.80	$0.00	$0.00	$0.00	$0.00

Code: G442A
Description: Impedance audiometry – technical component
FHO+ basket: Not in the FHO+ base rate basket (Schedule 2 or 2B).
Effective date: Apr 1, 2026
Termination date: No end date

Explanation

Updated October 26, 2026

Technical component of impedance audiometry (tympanometry), manual or automated; may include stapedial reflex and compliance testing.

What it covers

G442 is the technical component of impedance audiometry by manual or automated methods, an advanced diagnostic hearing test (J99).

It may include stapedial reflex and/or compliance testing (J99). The professional component is G529.

Billing rules

Advanced hearing tests pay nil unless the technical component is done by the otolaryngologist (or equivalent), or delegated to a CASLPO audiologist employed by that specialist or by a public hospital (J98).
Delegated technical work must meet the General Preamble delegation rules (GP62, J98).
Keep written records of your qualifications and those of staff you delegate to; without them the test pays nil (J98).
Technical component in hospital is paid at 86.10% of the listed fee, and is never payable for in-patients (GP11).
Fixed-level screening audiometry, and tests requested or arranged by third parties (school boards, employers, WSIB), are not insured (J98).

Often billed with

G529 professional component (J99).
G440/G525 or G441/G526 audiometry (J99).

Related codes: G529, G441, G440, G443

Source: Schedule of Benefits (July 1, 2026), Diagnostic and Therapeutic Procedures, Otolaryngology, page J99; diagnostic hearing test rules J98.

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