M84.521K Pathological fracture in neoplastic disease, right humerus, subsequent encounter for fracture with nonunion

Billable ICD-10-CM code, FY2026.

Built from M84.521 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 M84.521K

Back-references to M84.5

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

Nearby codes

• M84.52 Pathological fracture in neoplastic disease, humerus
• M84.521 Pathological fracture in neoplastic disease, right humerus
• M84.521A Pathological fracture in neoplastic disease, right humerus, initial encounter for fracture
• M84.521D Pathological fracture in neoplastic disease, right humerus, subsequent encounter for fracture with routine healing
• M84.521G Pathological fracture in neoplastic disease, right humerus, subsequent encounter for fracture with delayed healing
• M84.521K Pathological fracture in neoplastic disease, right humerus, subsequent encounter for fracture with nonunion (this code)
• M84.521P Pathological fracture in neoplastic disease, right humerus, subsequent encounter for fracture with malunion
• M84.521S Pathological fracture in neoplastic disease, right humerus, sequela
• M84.522 Pathological fracture in neoplastic disease, left humerus
• M84.522A Pathological fracture in neoplastic disease, left humerus, initial encounter for fracture
• M84.522D Pathological fracture in neoplastic disease, left humerus, subsequent encounter for fracture with routine healing