M66 Spontaneous rupture of synovium and tendon
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The ICD-10-CM code for Spontaneous rupture of synovium and tendon is M66 (FY2026). It is a non-billable category code — select a more specific code below for claims.
Classification
- Section
- M65-M67: Disorders of synovium and tendon (M65-M67)
- Category M66
- 135 codes (103 billable)
- FY2026 Status
- Stable since FY2024
Official Coding Guidelines
Osteoporosis without pathological fracture (M81)Category M81, Osteoporosis without current pathological fracture, is for use for patients with osteoporosis who do not currently have a pathologic fracture due to the osteoporosis, even if they have had a fracture in the past. For patients with a history of osteoporosis fractures, status code Z87.310, Personal history of (healed) osteoporosis fracture, should follow the code from M81.
Osteoporosis with current pathological fracture (M80)Category M80, Osteoporosis with current pathological fracture, is for patients who have a current pathologic fracture at the time of an encounter. The codes under M80 identify the site of the fracture. A code from category M80, not a traumatic fracture code, should be used for any patient with known osteoporosis who suffers a fracture, even if the patient had a minor fall or trauma, if that fall or trauma would not usually break a normal, healthy bone.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026
References
Cite This Page
Reference M66 with the canonical source and edition:
M66 — Spontaneous rupture of synovium and tendon. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/M66
Canonical URL: https://icd10codingpro.com/codes/M66