OHIP Diagnostic Codes

Search all of Ontario’s OHIP diagnostic codes, or browse them by section, as the Ministry of Health publishes them for claims.

Type a code, or words from its description, then open the code’s page.

Browse the list

The sections Ontario Ministry of Health prints its list in. Each code opens its own page.

Infections and Parasitic Diseases59 codes
Neoplasms92 codes
Endocrine, Nutritional and Metabolic Diseases and Immunity Disorders24 codes
Diseases of Blood and Blood-Forming Organs10 codes
Mental and Behavioural Disorders23 codes
Diseases of the Nervous System and Sense Organs50 codes
Diseases of the Circulatory System32 codes
Diseases of the Respiratory System26 codes
Diseases of the Digestive System40 codes
Diseases of the Genito-Urinary System36 codes
Complications of Pregnancy, Childbirth and the Puerperium27 codes
Diseases of the Skin and Subcutaneous Tissue20 codes
Diseases of Muscoloskeletal System and Connective Tissue24 codes
Congenital Anomalies18 codes
Perinatal Morbidity and Mortality9 codes
Symptoms, Signs and Ill-Defined Conditions7 codes
Accidents, Poisonings and Violence42 codes
Supplementary Classifications24 codes

Other code sets

Source and release

Data release
OHIP · March 2026
Effective date
Mar 13, 2026

This directory is built from the OHIP catalog that Vero Codes reads when it suggests codes: Ontario Ministry of Health’s March 2026 release, imported from the publisher’s file and checked against it. Search, lists, code pages and structured data all read that one catalog.

Frequently asked questions

What is OHIP?

OHIP diagnostic codes are the ICD-9-based codes Ontario’s Ministry of Health publishes for physicians to report the diagnosis on an OHIP claim.

How many OHIP diagnostic codes are there?

Ontario Ministry of Health’s March 2026 release lists 563 codes. Each has its own page here with its description, notes and place in the list.

Which release does this directory use?

Ontario Ministry of Health’s March 2026 release, in effect from Mar 13, 2026. Vero Codes reads the same catalog when it suggests codes from a note.

Can this directory replace the official list?

No. It is a reference for finding codes. Confirm a code against Ontario Ministry of Health’s current publication and the payer’s rules before you submit it.