M89.579 Osteolysis, unspecified ankle and foot

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 M89.579

Back-references to M89.5

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

Nearby codes

• M89.562 Osteolysis, left lower leg
• M89.569 Osteolysis, unspecified lower leg
• M89.57 Osteolysis, ankle and foot
• M89.571 Osteolysis, right ankle and foot
• M89.572 Osteolysis, left ankle and foot
• M89.579 Osteolysis, unspecified ankle and foot (this code)
• M89.58 Osteolysis, other site
• M89.59 Osteolysis, multiple sites
• M89.6 Osteopathy after poliomyelitis
• M89.60 Osteopathy after poliomyelitis, unspecified site
• M89.61 Osteopathy after poliomyelitis, shoulder