S49.109K Unspecified physeal fracture of lower end of humerus, unspecified arm, subsequent encounter for fracture with nonunion

Billable ICD-10-CM code, FY2026.

Built from S49.109 with 7th character K (subsequent encounter for fracture with nonunion).

Applies from S49 Other and unspecified injuries of shoulder and upper arm

7th character note

• The appropriate 7th character is to be added to each code from subcategories S49.0 and S49.1

7th character required

• A — initial encounter for closed fracture
• D — subsequent encounter for fracture with routine healing
• G — subsequent encounter for fracture with delayed healing
• K — subsequent encounter for fracture with nonunion
• P — subsequent encounter for fracture with malunion
• S — sequela

Medicare Code Edits (MCE v43.1 (April 2026))

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Code annotations containing back-references to S49.109K

Back-references to S49.1

• Type 2 Excludes: S42.3 Fracture of shaft of humerus ("physeal fractures of lower end of humerus (S49.1-)")
• Type 2 Excludes: S42.4 Fracture of lower end of humerus ("physeal fracture of lower end of humerus (S49.1-)")

Nearby codes

• S49.102S Unspecified physeal fracture of lower end of humerus, left arm, sequela
• S49.109 Unspecified physeal fracture of lower end of humerus, unspecified arm
• S49.109A Unspecified physeal fracture of lower end of humerus, unspecified arm, initial encounter for closed fracture
• S49.109D Unspecified physeal fracture of lower end of humerus, unspecified arm, subsequent encounter for fracture with routine healing
• S49.109G Unspecified physeal fracture of lower end of humerus, unspecified arm, subsequent encounter for fracture with delayed healing
• S49.109K Unspecified physeal fracture of lower end of humerus, unspecified arm, subsequent encounter for fracture with nonunion (this code)
• S49.109P Unspecified physeal fracture of lower end of humerus, unspecified arm, subsequent encounter for fracture with malunion
• S49.109S Unspecified physeal fracture of lower end of humerus, unspecified arm, sequela
• S49.11 Salter-Harris Type I physeal fracture of lower end of humerus
• S49.111 Salter-Harris Type I physeal fracture of lower end of humerus, right arm
• S49.111A Salter-Harris Type I physeal fracture of lower end of humerus, right arm, initial encounter for closed fracture