Diagnostic code
451 — Diseases of Veins and Lyphatics: Phlebitis, thrombophlebitis
451 is an OHIP diagnostic code used on Ontario Health Insurance Plan claims. Diseases of Veins and Lyphatics: Phlebitis, thrombophlebitis.
- Code
- 451
- Description
- Diseases of Veins and Lyphatics: Phlebitis, thrombophlebitis
Updated October 26, 2026
451 is the OHIP diagnostic code for phlebitis and thrombophlebitis, the code that fits a deep vein thrombosis (DVT).
Conditions billed under this code
- DVT
What it covers
The Ministry lists 451 as 'Phlebitis, thrombophlebitis' under Diseases of Veins and Lymphatics.
The list doesn't name DVT. In ICD-9, the system the list is based on, thrombophlebitis of the deep veins is filed under 451, and the only other vein clot code in the list is portal vein thrombosis (452). So 451 fits a DVT as well as superficial thrombophlebitis.
Close neighbours: 415 pulmonary embolism, 671 thrombophlebitis after delivery, 452 portal vein thrombosis, 454 varicose veins, 457 lymphedema.
Related codes: 415, 671, 452, 454, 457
Sources
APEX flags claims whose diagnostic code does not fit the service billed before they come back rejected. See how APEX works · Pricing