Other acquired deformities of limbs
Non-billable header
M21 is a non-billable header code. Use one of the more specific codes below.
Inclusion terms
Includes
- Note: Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Excludes1
Not coded here — never report together with this code.
Excludes2
Not included here — may be reported together when both conditions exist.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- joints of the spine (M40-M54)
- acquired deformities of fingers or toes (M20.-)
- coxa plana (M91.2)
More specific codes M21
- M21.0Valgus deformity, not elsewhere classifiedHeader
- M21.1Varus deformity, not elsewhere classifiedHeader
- M21.2Flexion deformityHeader
- M21.3Wrist or foot drop (acquired)Header
- M21.4Flat foot [pes planus] (acquired)Header
- M21.5Acquired clawhand, clubhand, clawfoot and clubfootHeader
- M21.6Other acquired deformities of footHeader
- M21.7Unequal limb length (acquired)Header
- M21.8Other specified acquired deformities of limbsHeader
- M21.9Unspecified acquired deformity of limb and handHeader