M21.00
M21.00: Valgus deformity, not elsewhere classified, unspecified site
Billable / specific codeICD-10-CM
M21.00 is a billable, specific ICD-10-CM code for valgus deformity, not elsewhere classified, unspecified site. It is valid for submission on a claim.
Check M21.00 with the rest of the claim: free scrubberExcludes1 inherited from the categories above M21.00
A category’s note binds every code beneath it.
Written on M21.0: Valgus deformity, not elsewhere classified
Excludes2 inherited from the categories above M21.00
Not part of this code, but both may be coded when both are present.
Other codes that can never be billed with M21.00
Their own Excludes1 notes name this code, so the conflict is not listed above.
- M23Internal derangement of knee
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
M21.00 is named in 7 Medicare coverage policies: 0 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
Alphabetic index entries that lead here
- Deformity›valgus NEC
Code history
Unchanged in every release from FY2024 to FY2027.