Is M89.021 a billable ICD-10-CM code?

Yes. M89.021 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does M89.021 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other osteopathies (M86-M90).

What cannot be coded together with M89.021?

M89.021 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 M89.021 (M89.0) and apply to it just the same.

M89.021

M89.021 — Algoneurodystrophy, right upper arm

Billable / specific codeICD-10-CMright

M89.021 is a billable, specific ICD-10-CM code for algoneurodystrophy, right upper arm. It is valid for submission on a claim.

Excludes1 inherited from the categories above M89.021

These are not written on M89.021, but they bind it: a note on a category applies to every code beneath it. Billing M89.021 with anything listed here is a denial.

Written on M89.0 — Algoneurodystrophy

causalgia, lower limb (G57.7-)
causalgia, upper limb (G56.4-)
complex regional pain syndrome II, lower limb (G57.7-)
complex regional pain syndrome II, upper limb (G56.4-)
reflex sympathetic dystrophy (G90.5-)

Risk adjustment

M89.021 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

M89.021 is named in 7 Medicare coverage policies — 0 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

M89.021 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 M89.02. If M89.021 is not quite right, the correct code is usually one of these.

Questions about M89.021

Is M89.021 a billable ICD-10-CM code?: Yes. M89.021 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does M89.021 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other osteopathies (M86-M90).
What cannot be coded together with M89.021?: M89.021 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 M89.021 (M89.0) and apply to it just the same.