Is M71.22 a billable ICD-10-CM code?

Yes. M71.22 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does M71.22 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other soft tissue disorders (M70-M79).

What cannot be coded together with M71.22?

M71.22 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above M71.22 (M71.2, M71) and apply to it just the same.

M71.22

M71.22 — Synovial cyst of popliteal space [Baker], left knee

Billable / specific codeICD-10-CMleft

M71.22 is a billable, specific ICD-10-CM code for synovial cyst of popliteal space [baker], left knee. It is valid for submission on a claim.

Excludes1 inherited from the categories above M71.22

These are not written on M71.22, but they bind it: a note on a category applies to every code beneath it. Billing M71.22 with anything listed here is a denial.

Written on M71.2 — Synovial cyst of popliteal space [Baker]

synovial cyst of popliteal space with rupture (M66.0)

Written on M71 — Other bursopathies

bunion (M20.1)
bursitis related to use, overuse or pressure (M70.-)
enthesopathies (M76-M77)

Risk adjustment

M71.22 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

M71.22 is named in 13 Medicare coverage policies — 6 listing it as supporting medical necessity, and 7 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
A58883Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
A58893Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
A59374Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered

Code history

M71.22 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share M71.2. If M71.22 is not quite right, the correct code is usually one of these.

Questions about M71.22

Is M71.22 a billable ICD-10-CM code?: Yes. M71.22 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does M71.22 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other soft tissue disorders (M70-M79).
What cannot be coded together with M71.22?: M71.22 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above M71.22 (M71.2, M71) and apply to it just the same.