ICD-10-CM Diagnosis Code (2025)
Official Description for M21
Other acquired deformities of limbs
Coding Notes & Guidelines for M21
- acquired absence of limb (Z89.-)
- congenital absence of limbs (Q71-Q73)
- congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74)
- metatarsus valgus (Q66.6)
- talipes calcaneovalgus (Q66.4-)
- metatarsus varus (Q66.22-)
- tibia vara (M92.51-)
congenital pes planus (Q66.5-)
clubfoot, not specified as acquired (Q66.89)
- acquired deformities of fingers or toes (M20.-)
- coxa plana (M91.2)
deformities of toe (acquired) (M20.1-M20.6-)
coxa plana (M91.2)
Cubitus valgus
- Genu valgum
- Knock knee
Cubitus varus, elbow
- Bow leg
- Genu varum
Child Codes (More Specific Codes for M21):
About ICD-10-CM Code M21 (Other acquired deformities of limbs)
ICD-10-CM code M21 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM M21 became effective on October 1, 2024.
This page provides detailed information about M21 - Other acquired deformities of limbs. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Other acquired deformities of limbs.