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ICD-10-CM 2027 diagnosis code

M71.2Synovial cyst of popliteal space [Baker]

Not billable — use a more specific code

M71.2 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Looking up by condition? See ICD-10 code for Baker's cyst.

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 M71.2

M71.2 is the ICD-10-CM diagnosis code for Synovial cyst of popliteal space [Baker]. It belongs to category M71 (other bursopathies), block M70-M79 (other soft tissue disorders) 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 M71 (other bursopathies), M71.2 is specifically for Synovial cyst of popliteal space [Baker]. Related codes cover abscess of bursa (M71.0), other infective bursitis (M71.1), other bursal cyst (M71.3), calcium deposit in bursa (M71.4), other bursitis, not elsewhere classified (M71.5), other specified bursopathies (M71.8) and Bursopathy, unspecified (M71.9).

To report this condition, pick the subcode that matches the documentation: M71.20 (unspecified knee), M71.21 (right knee) and M71.22 (left knee).

Don't report M71.2 together with the conditions in its Excludes1 note: synovial cyst of popliteal space with rupture (M66.0).

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 M71.2

Coding notes

Excludes1Not coded here — never report together with this code
  • synovial cyst of popliteal space with rupture (M66.0)

Notes that apply from higher levels

Instructions written at a parent level also apply to M71.2.

› From M71 Other bursopathies
Excludes1
  • bunion (M20.1)
  • bursitis related to use, overuse or pressure (M70.-)
  • enthesopathies (M76-M77)

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 M71.2.

Codes whose notes reference M71.2

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 M71.2

Is M71.2 billable?

No. M71.2 is a header code. Report one of its more specific subcodes instead.