Is M25.521 a billable ICD-10-CM code?

Yes. M25.521 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does M25.521 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other joint disorders (M20-M25).

M25.521

M25.521 — Pain in right elbow

Billable / specific codeICD-10-CMright

M25.521 is a billable, specific ICD-10-CM code for pain in right elbow. It is valid for submission on a claim.

Excludes2 inherited from the categories above M25.521

Also inherited, and the opposite of Excludes1: these conditions are not part of M25.521, but a patient can have both, so you may code both.

Written on M25.5 — Pain in joint

pain in hand (M79.64-)
pain in fingers (M79.64-)
pain in foot (M79.67-)
pain in limb (M79.6-)
pain in toes (M79.67-)

Written on M25 — Other joint disorder, not elsewhere classified

abnormality of gait and mobility (R26.-)
acquired deformities of limb (M20-M21)
calcification of bursa (M71.4-)
calcification of shoulder (joint) (M75.3)
calcification of tendon (M65.2-)
difficulty in walking (R26.2)
temporomandibular joint disorder (M26.6-)

Risk adjustment

M25.521 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

M25.521 is named in 28 Medicare coverage policies — 16 listing it as supporting medical necessity, and 12 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A57701Billing and Coding: Trigger Point Injections (TPI)not covered
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

Code history

M25.521 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 M25.52. If M25.521 is not quite right, the correct code is usually one of these.

Questions about M25.521

Is M25.521 a billable ICD-10-CM code?: Yes. M25.521 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does M25.521 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other joint disorders (M20-M25).