M84.753K Incomplete atypical femoral fracture, unspecified leg, subsequent encounter for fracture with nonunion

Billable ICD-10-CM code, FY2026.

Built from M84.753 with 7th character K (subsequent encounter for fracture with nonunion).

Applies from M84 Disorder of continuity of bone

Excludes2 (not included here)

• traumatic fracture of bone-see fracture, by site

Applies from M84.75 Atypical femoral fracture

7th character note

• The appropriate 7th character is to be added to each code from M84.75:

7th character required

• A — initial encounter for 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.

Diagnosis Index entries for M84.753K

• Fracture, nontraumatic, NEC › atypical › femur › incomplete

Nearby codes

• M84.752S Incomplete atypical femoral fracture, left leg, sequela
• M84.753 Incomplete atypical femoral fracture, unspecified leg
• M84.753A Incomplete atypical femoral fracture, unspecified leg, initial encounter for fracture
• M84.753D Incomplete atypical femoral fracture, unspecified leg, subsequent encounter for fracture with routine healing
• M84.753G Incomplete atypical femoral fracture, unspecified leg, subsequent encounter for fracture with delayed healing
• M84.753K Incomplete atypical femoral fracture, unspecified leg, subsequent encounter for fracture with nonunion (this code)
• M84.753P Incomplete atypical femoral fracture, unspecified leg, subsequent encounter for fracture with malunion
• M84.753S Incomplete atypical femoral fracture, unspecified leg, sequela
• M84.754 Complete transverse atypical femoral fracture, right leg
• M84.754A Complete transverse atypical femoral fracture, right leg, initial encounter for fracture
• M84.754D Complete transverse atypical femoral fracture, right leg, subsequent encounter for fracture with routine healing