M89.539 Osteolysis, unspecified forearm

Billable ICD-10-CM code, FY2026.

Applies from M89.5 Osteolysis

Excludes2 (not included here)

• periprosthetic osteolysis of internal prosthetic joint (T84.05-)

Use additional code

• code to identify major osseous defect, if applicable (M89.7-)

MS-DRG index

Defines the logic of DRG(s) 564-566 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 733.99 Other disorders of bone and cartilage (approximate)

Code annotations containing back-references to M89.539

Back-references to M89.5

• Code First: M89.7 Major osseous defect ("osteolysis (M89.5-)")

Nearby codes

• M89.522 Osteolysis, left upper arm
• M89.529 Osteolysis, unspecified upper arm
• M89.53 Osteolysis, forearm
• M89.531 Osteolysis, right forearm
• M89.532 Osteolysis, left forearm
• M89.539 Osteolysis, unspecified forearm (this code)
• M89.54 Osteolysis, hand
• M89.541 Osteolysis, right hand
• M89.542 Osteolysis, left hand
• M89.549 Osteolysis, unspecified hand
• M89.55 Osteolysis, thigh