OHIP Code W121: Additional visit due to intercurrent illness (Fee Guide)

What is OHIP Billing Code W121?

OHIP code W121 refers to Additional visit due to intercurrent illness. This page summarizes typical billing context, key notes, and common questions for Ontario physicians.

Billing Requirements & Rules

• When to use: Extra visit medically necessary beyond routine.

How to Review This Code

Use this dictionary page as a quick reference before checking the official OHIP Schedule of Benefits, local billing policies, and the clinical documentation in the patient chart. Confirm that the visit, service, provider type, patient eligibility, and any timing or modifier rules match the code description before submitting a claim.

For audit readiness, document the clinical reason for the encounter, the service performed, relevant time or complexity requirements when they apply, and any counselling, forms, procedures, or follow-up instructions that support the selected billing code.