S59.042K Salter-Harris Type IV physeal fracture of lower end of ulna, left arm, subsequent encounter for fracture with nonunion

Billable ICD-10-CM code, FY2026.

Built from S59.042 with 7th character K (subsequent encounter for fracture with nonunion).

Applies from S59 Other and unspecified injuries of elbow and forearm

Excludes2 (not included here)

• other and unspecified injuries of wrist and hand (S69.-)

7th character note

• The appropriate 7th character is to be added to each code from subcategories S59.0, S59.1, and S59.2

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

Nearby codes

• S59.041S Salter-Harris Type IV physeal fracture of lower end of ulna, right arm, sequela
• S59.042 Salter-Harris Type IV physeal fracture of lower end of ulna, left arm
• S59.042A Salter-Harris Type IV physeal fracture of lower end of ulna, left arm, initial encounter for closed fracture
• S59.042D Salter-Harris Type IV physeal fracture of lower end of ulna, left arm, subsequent encounter for fracture with routine healing
• S59.042G Salter-Harris Type IV physeal fracture of lower end of ulna, left arm, subsequent encounter for fracture with delayed healing
• S59.042K Salter-Harris Type IV physeal fracture of lower end of ulna, left arm, subsequent encounter for fracture with nonunion (this code)
• S59.042P Salter-Harris Type IV physeal fracture of lower end of ulna, left arm, subsequent encounter for fracture with malunion
• S59.042S Salter-Harris Type IV physeal fracture of lower end of ulna, left arm, sequela
• S59.049 Salter-Harris Type IV physeal fracture of lower end of ulna, unspecified arm
• S59.049A Salter-Harris Type IV physeal fracture of lower end of ulna, unspecified arm, initial encounter for closed fracture
• S59.049D Salter-Harris Type IV physeal fracture of lower end of ulna, unspecified arm, subsequent encounter for fracture with routine healing