M99 Biomechanical lesions, not elsewhere classified
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The ICD-10-CM code for Biomechanical lesions, not elsewhere classified is M99 (FY2026). It is a non-billable category code — select a more specific code below for claims.
Classification
- Section
- M99: Biomechanical lesions, not elsewhere classified (M99)
- Category M99
- 101 codes (91 billable)
- FY2026 Status
- Stable since FY2024
Notes
- This category should not be used if the condition can be classified elsewhere.
Official Coding Guidelines
Chapter 13 header13. Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)
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.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026
References
Cite This Page
Reference M99 with the canonical source and edition:
M99 — Biomechanical lesions, not elsewhere classified. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/M99
Canonical URL: https://icd10codingpro.com/codes/M99