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ICD-10-CM 2027 diagnosis code

M67.26Synovial hypertrophy, not elsewhere classified, lower leg

Not billable — use a more specific code

M67.26 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M67.26

M67.26 is the ICD-10-CM diagnosis code for Synovial hypertrophy, not elsewhere classified, lower leg. It belongs to category M67 (other disorders of synovium and tendon), block M65-M67 (disorders of synovium and tendon) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within M67.2 (Synovial hypertrophy, not elsewhere classified), M67.26 is specifically for Synovial hypertrophy, not elsewhere classified, lower leg. Related codes cover unspecified site (M67.20), shoulder (M67.21), upper arm (M67.22), forearm (M67.23), hand (M67.24), thigh (M67.25), ankle and foot (M67.27), other site (M67.28) and 1 more.

To report this condition, pick the subcode that matches the documentation: M67.261 (leg), M67.262 (leg) and M67.269 (leg).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under M67.26

Notes that apply from higher levels

Instructions written at a parent level also apply to M67.26.

› From M67.2 Synovial hypertrophy, not elsewhere classified
Excludes1
  • villonodular synovitis (pigmented) (M12.2-)
› From M67 Other disorders of synovium and tendon
Excludes1
  • palmar fascial fibromatosis [Dupuytren] (M72.0)
  • tendinitis NOS (M77.9-)
  • xanthomatosis localized to tendons (E78.2)

Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to M67.26.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about M67.26

Is M67.26 billable?

No. M67.26 is a header code. Report one of its more specific subcodes instead.