< Billing codes

Billing code

G263A

Coronary drug study add-on

Bill G263 with selective coronary catheterization (Z442) when other drug interventional studies are done, including intracoronary nitroglycerin.

Watch for: Bill it only with a payable Z442, or OHIP rejects it.

Code

G263A

FHO+ basket

Not in the FHO+ base rate basket (Schedule 2 or 2B).

Effective date

Apr 1, 2025

Termination date

No end date

Explanation

Updated October 26, 2026

Add-on to selective coronary catheterization (Z442) when other drug interventional studies are done, including intracoronary nitroglycerin.

What it covers

G263 is added to selective coronary catheterization of both arteries (Z442) when other drug interventional studies are carried out (J11).

It includes injection of intracoronary nitroglycerin (J11).

Billing rules

• G263 is an add-on: bill it only with Z442 (J11).
• G263 is exempt from the 50% reduction for additional catheterization procedures at one sitting (J9).
• It is on the major invasive procedure list for after-hours premiums: add E409 (+50%) or E410 (+75%) when non-elective, or elective but delayed by an emergency into that period; ED physicians billing H codes use E412/E413 instead (GP103–GP104).
• The # prefix means the fee does not include premises, equipment, supplies and personnel at the place where the procedure itself is done (J1, J3).

Often billed with

• Z442 selective coronary catheterization (J11).
• E409/E410 after-hours premium when non-elective (GP104).

Common rejections

• ADF: The base procedure was missing, invalid or paid at zero; G263 must be billed with Z442 (J11).

Related codes: Z442, G297, G509, Z439, Z440, Z434

Source: Schedule of Benefits (July 1, 2026), Diagnostic and Therapeutic Procedures, Cardiovascular, page J11.

APEX checks every paid claim against the Schedule of Benefits and flags codes billed below what the visit qualified for. See how APEX works · Pricing