M84.631A Pathological fracture in other disease, right ulna, initial encounter for fracture

Billable ICD-10-CM code, FY2026.

Built from M84.631 with 7th character A (initial encounter for fracture).

Applies from M84 Disorder of continuity of bone

Excludes2 (not included here)

• traumatic fracture of bone-see fracture, by site

Applies from M84.6 Pathological fracture in other disease

Excludes1 (never code together)

• pathological fracture in osteoporosis (M80.-)

Code also

• underlying condition

7th character note

• The appropriate 7th character is to be added to each code from subcategory M84.6:

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

Risk adjustment (HCC)

• RxHCC V08: HCC 87 — Osteoporosis, Vertebral and Pathological Fractures

Code annotations containing back-references to M84.631A

Back-references to M84.6

• Type 1 Excludes: M84.4 Pathological fracture, not elsewhere classified ("pathological fracture in other disease (M84.6-)")

Nearby codes

• M84.629K Pathological fracture in other disease, unspecified humerus, subsequent encounter for fracture with nonunion
• M84.629P Pathological fracture in other disease, unspecified humerus, subsequent encounter for fracture with malunion
• M84.629S Pathological fracture in other disease, unspecified humerus, sequela
• M84.63 Pathological fracture in other disease, ulna and radius
• M84.631 Pathological fracture in other disease, right ulna
• M84.631A Pathological fracture in other disease, right ulna, initial encounter for fracture (this code)
• M84.631D Pathological fracture in other disease, right ulna, subsequent encounter for fracture with routine healing
• M84.631G Pathological fracture in other disease, right ulna, subsequent encounter for fracture with delayed healing
• M84.631K Pathological fracture in other disease, right ulna, subsequent encounter for fracture with nonunion
• M84.631P Pathological fracture in other disease, right ulna, subsequent encounter for fracture with malunion
• M84.631S Pathological fracture in other disease, right ulna, sequela