MCMedicalCodingSoftware
M91.21

M91.21: Coxa plana, right hip

Billable / specific codeICD-10-CMright

M91.21 is a billable, specific ICD-10-CM code for coxa plana, right hip. It is valid for submission on a claim.

Check M91.21 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above M91.21

A category’s note binds every code beneath it.

Written on M91: Juvenile osteochondrosis of hip and pelvis

  • slipped upper femoral epiphysis (nontraumatic) (M93.0-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

M91.21 is named in 9 Medicare coverage policies: 2 listing it as supporting medical necessity, and 7 listing it as NOT covered. Which one applies depends on your Medicare contractor.

  • 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

Unchanged in every release from FY2024 to FY2027.

Other codes under M91.2

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.