What is OHIP billing code X129?

X129 is "Retrograde pyelogram", an OHIP Laboratory code from the Ontario Schedule of Benefits (Physician Services).

How much does X129 pay?

The current OHIP fee for X129 is $0.00, effective 2025-04-01, per the Ontario Schedule of Benefits.

How do I bill X129 to OHIP?

X129 is submitted through OHIP's MCEDT claims system, either directly or via billing software. SnapBill validates X129 claims against the Schedule of Benefits rules before submission.

What codes are related to X129?

Codes related to X129 in the Schedule of Benefits include X130, X137, X135, X131, X191, X138, X139, X134.

All codes

X129

X129 – Retrograde pyelogram

OHIP Laboratory Code — DIAGNOSTIC RADIOLOGY · Schedule of Benefits

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A retrograde pyelogram is a diagnostic imaging procedure of the genitourinary tract, performed either unilaterally or bilaterally. It involves the retrograde (backwards) injection of contrast medium into the ureters to visualize the renal pelvis and ureters. As a diagnostic service with separate components, claims are submitted using a suffix. The technical component (H fee) is claimed as X129B and the professional component (P fee) is claimed as X129C (as per ).

When to Use

Use X129 for diagnostic visualization of the renal pelvis and ureters via retrograde contrast injection when antegrade studies are insufficient or contraindicated.
Select X129 when the procedure is performed to investigate ureteral obstruction or filling defects that require direct retrograde access.

Common Pitfalls

Failing to split the claim into X129B for the technical component and X129C for the professional component will result in automatic rejection.
Billing X129 without a valid referring physician or nurse practitioner on the claim record violates the referral requirements outlined in GP16.
Attempting to bill X129 alongside other imaging codes without ensuring the clinical necessity for separate diagnostic procedures is documented, as this triggers audit flags.

Billing Tips

Ensure the professional component X129C is submitted by the physician who interpreted the study, while X129B reflects the technical facility resources.
Apply the appropriate age-based percentage premiums (e.g., for patients under 16) to the procedural fee to maximize reimbursement for pediatric cases.

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Provider Fee$0.00

Surgical Assistant Fee$24.70

Non-Anaesthetist Fee$9.00

Effective: April 1, 2025

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