M84.550K Pathological fracture in neoplastic disease, pelvis, subsequent encounter for fracture with nonunion

Billable ICD-10-CM code, FY2026.

Built from M84.550 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 M84.5 Pathological fracture in neoplastic disease

Code also

• underlying neoplasm

7th character note

• The appropriate 7th character is to be added to each code from subcategory M84.5:

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

Code annotations containing back-references to M84.550K

Back-references to M84.5

• Type 1 Excludes: M84.4 Pathological fracture, not elsewhere classified ("pathological fracture in neoplastic disease (M84.5-)")

Diagnosis Index entries for M84.550K

• Fracture, pathological (pathologic) › due to › neoplastic disease NEC › ilium
• Fracture, pathological (pathologic) › due to › neoplastic disease NEC › ischium
• Fracture, pathological (pathologic) › due to › neoplastic disease NEC › pelvis

Nearby codes

• M84.55 Pathological fracture in neoplastic disease, pelvis and femur
• M84.550 Pathological fracture in neoplastic disease, pelvis
• M84.550A Pathological fracture in neoplastic disease, pelvis, initial encounter for fracture
• M84.550D Pathological fracture in neoplastic disease, pelvis, subsequent encounter for fracture with routine healing
• M84.550G Pathological fracture in neoplastic disease, pelvis, subsequent encounter for fracture with delayed healing
• M84.550K Pathological fracture in neoplastic disease, pelvis, subsequent encounter for fracture with nonunion (this code)
• M84.550P Pathological fracture in neoplastic disease, pelvis, subsequent encounter for fracture with malunion
• M84.550S Pathological fracture in neoplastic disease, pelvis, sequela
• M84.551 Pathological fracture in neoplastic disease, right femur
• M84.551A Pathological fracture in neoplastic disease, right femur, initial encounter for fracture
• M84.551D Pathological fracture in neoplastic disease, right femur, subsequent encounter for fracture with routine healing