< Diagnostic codes

Diagnostic code

726 — Fibromyalgia

726 is an OHIP diagnostic code used on Ontario Health Insurance Plan claims. Fibromyalgia.

Code
726
Description
Fibromyalgia

Updated October 26, 2026

726 is the OHIP diagnostic code for fibromyalgia.

Conditions billed under this code

  • Fibromyalgia

What it covers

The Ministry lists 726 as 'Fibromyalgia' in the Diseases of the Musculoskeletal System and Connective Tissue chapter.

In ICD-9, 726 is a group of tendon and ligament attachment disorders, such as frozen shoulder and tennis elbow. Ontario's list gives 726 to fibromyalgia alone and doesn't name those conditions.

Close neighbours: 795 myalgic encephalomyelitis/chronic fatigue syndrome, 729 fibrositis, myositis and muscular rheumatism, 725 polymyalgia rheumatica, and 781 for muscle pain not yet diagnosed.

Billing notes

  • K037, fibromyalgia/myalgic encephalomyelitis care, is a family practice time-based service billed per half-hour unit. No other consultation, assessment, visit or time-based service is payable to the same physician for the same patient that day (A51).
  • Fibromyalgia is one of six diseases eligible for chronic disease shared appointments, K140 to K144 (A22).

Related codes: 795, 729, 725, 781

Sources

APEX flags claims whose diagnostic code does not fit the service billed before they come back rejected. See how APEX works · Pricing