Is M12.422 a billable ICD-10-CM code?

Yes. M12.422 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does M12.422 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Inflammatory polyarthropathies (M05-M14).

What cannot be coded together with M12.422?

M12.422 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 M12.422 (M12) and apply to it just the same.

M12.422

M12.422 — Intermittent hydrarthrosis, left elbow

Billable / specific codeICD-10-CMleft

M12.422 is a billable, specific ICD-10-CM code for intermittent hydrarthrosis, left elbow. It is valid for submission on a claim.

Excludes1 inherited from the categories above M12.422

These are not written on M12.422, but they bind it: a note on a category applies to every code beneath it. Billing M12.422 with anything listed here is a denial.

Written on M12 — Other and unspecified arthropathy

arthrosis (M15-M19)
cricoarytenoid arthropathy (J38.7)

Risk adjustment

M12.422 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

M12.422 is named in 9 Medicare coverage policies — 2 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

M12.422 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 M12.42. If M12.422 is not quite right, the correct code is usually one of these.

Questions about M12.422

Is M12.422 a billable ICD-10-CM code?: Yes. M12.422 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does M12.422 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Inflammatory polyarthropathies (M05-M14).
What cannot be coded together with M12.422?: M12.422 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 M12.422 (M12) and apply to it just the same.