M21.2 Flexion deformity

Non-billable header with 8 child codes.

Applies from M21 Other acquired deformities of limbs

Excludes1 (never code together)

• acquired absence of limb (Z89.-)
• congenital absence of limbs (Q71-Q73)
• congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74)

Excludes2 (not included here)

• acquired deformities of fingers or toes (M20.-)
• coxa plana (M91.2)

Codes under M21.2

• M21.20 Flexion deformity, unspecified site
• M21.21 Flexion deformity, shoulder
• M21.22 Flexion deformity, elbow
• M21.23 Flexion deformity, wrist
• M21.24 Flexion deformity, finger joints
• M21.25 Flexion deformity, hip
• M21.26 Flexion deformity, knee
• M21.27 Flexion deformity, ankle and toes

Code annotations containing back-references to M21.2

Back-references to M21

• Type 1 Excludes: M23 Internal derangement of knee ("deformity of knee (M21.-)")
• Type 2 Excludes: M24.5 Contracture of joint ("acquired deformities of limbs (M20-M21)")
• Type 2 Excludes: M25 Other joint disorder, not elsewhere classified ("acquired deformities of limb (M20-M21)")
• Type 2 Excludes: M95 Other acquired deformities of musculoskeletal system and connective tissue ("acquired deformities of limbs (M20-M21)")
• Type 1 Excludes: Z89 Acquired absence of limb ("acquired deformities of limbs (M20-M21)")

Nearby codes

• M21.169 Varus deformity, not elsewhere classified, unspecified knee
• M21.17 Varus deformity, not elsewhere classified, ankle
• M21.171 Varus deformity, not elsewhere classified, right ankle
• M21.172 Varus deformity, not elsewhere classified, left ankle
• M21.179 Varus deformity, not elsewhere classified, unspecified ankle
• M21.2 Flexion deformity (this code)
• M21.20 Flexion deformity, unspecified site
• M21.21 Flexion deformity, shoulder
• M21.211 Flexion deformity, right shoulder
• M21.212 Flexion deformity, left shoulder
• M21.219 Flexion deformity, unspecified shoulder