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ICD-10-CM · FY 2026 APRIL UPDATE

M21

Other acquired deformities of limbs

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
M21.0Valgus deformity, not elsewhere classifiedCategory
M21.00Valgus deformity, not elsewhere classified, unspecified siteBillable
M21.02Valgus deformity, not elsewhere classified, elbowCategory
M21.021Valgus deformity, not elsewhere classified, right elbowBillable
M21.022Valgus deformity, not elsewhere classified, left elbowBillable
M21.029Valgus deformity, not elsewhere classified, unspecified elbowBillable
M21.05Valgus deformity, not elsewhere classified, hipCategory
M21.051Valgus deformity, not elsewhere classified, right hipBillable
M21.052Valgus deformity, not elsewhere classified, left hipBillable
M21.059Valgus deformity, not elsewhere classified, unspecified hipBillable
M21.06Valgus deformity, not elsewhere classified, kneeCategory
M21.061Valgus deformity, not elsewhere classified, right kneeBillable
M21.062Valgus deformity, not elsewhere classified, left kneeBillable
M21.069Valgus deformity, not elsewhere classified, unspecified kneeBillable
M21.07Valgus deformity, not elsewhere classified, ankleCategory
M21.071Valgus deformity, not elsewhere classified, right ankleBillable
M21.072Valgus deformity, not elsewhere classified, left ankleBillable
M21.079Valgus deformity, not elsewhere classified, unspecified ankleBillable
M21.1Varus deformity, not elsewhere classifiedCategory
M21.10Varus deformity, not elsewhere classified, unspecified siteBillable
M21.12Varus deformity, not elsewhere classified, elbowCategory
M21.121Varus deformity, not elsewhere classified, right elbowBillable
M21.122Varus deformity, not elsewhere classified, left elbowBillable
M21.129Varus deformity, not elsewhere classified, unspecified elbowBillable
M21.15Varus deformity, not elsewhere classified, hipCategory
M21.151Varus deformity, not elsewhere classified, right hipBillable
M21.152Varus deformity, not elsewhere classified, left hipBillable
M21.159Varus deformity, not elsewhere classified, unspecified hipBillable
M21.16Varus deformity, not elsewhere classified, kneeCategory
M21.161Varus deformity, not elsewhere classified, right kneeBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.