What is OHIP billing code X121?

X121 is "Stereotactic core breast biopsy", an OHIP Laboratory code from the Ontario Schedule of Benefits (Physician Services).

How much does X121 pay?

The current OHIP fee for X121 is $0.00, effective 2025-04-01, per the Ontario Schedule of Benefits.

How do I bill X121 to OHIP?

X121 is submitted through OHIP's MCEDT claims system, either directly or via billing software. SnapBill validates X121 claims against the Schedule of Benefits rules before submission.

All codes

X121

X121 – Stereotactic core breast biopsy

OHIP Laboratory Code — DIAGNOSTIC RADIOLOGY · Schedule of Benefits

Ask AI Bill This Code — Sign Up Free

Stereotactic core breast biopsy

When to Use

Use X121 when performing a core needle biopsy of a breast lesion specifically localized using stereotactic mammographic guidance.
Select X121 instead of ultrasound-guided biopsy codes when the target lesion is mammographically occult or only visible via stereotactic imaging.

Common Pitfalls

Billing X121 in conjunction with a diagnostic mammogram on the same day often triggers rejections unless specific diagnostic code modifiers are applied.
Failure to document the specific stereotactic guidance component can lead to audit reclassifications if the procedure is mistaken for a standard palpation-guided biopsy.

Billing Tips

Ensure the associated imaging interpretation and report are cross-referenced with the X121 claim to justify the stereotactic guidance component.

Have a specific question? Ask our billing assistant

Provider Fee$0.00

Non-Anaesthetist Fee$83.15

Effective: April 1, 2025

Ready to bill this code?

SnapBill makes OHIP billing simple — auto-filled codes, validation, and batch submission.

Get Started Free Already have an account? Sign in