M89.559 Osteolysis, unspecified thigh

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 M89.559

Back-references to M89.5

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

Nearby codes

• M89.542 Osteolysis, left hand
• M89.549 Osteolysis, unspecified hand
• M89.55 Osteolysis, thigh
• M89.551 Osteolysis, right thigh
• M89.552 Osteolysis, left thigh
• M89.559 Osteolysis, unspecified thigh (this code)
• M89.56 Osteolysis, lower leg
• M89.561 Osteolysis, right lower leg
• M89.562 Osteolysis, left lower leg
• M89.569 Osteolysis, unspecified lower leg
• M89.57 Osteolysis, ankle and foot