M85.80 Other specified disorders of bone density and structure, unspecified site

Billable ICD-10-CM code, FY2026.

Applies from M85 Other disorders of bone density and structure

Excludes1 (never code together)

• osteogenesis imperfecta (Q78.0)
• osteopetrosis (Q78.2)
• osteopoikilosis (Q78.8)
• polyostotic fibrous dysplasia (Q78.1)

Applies from M85.8 Other specified disorders of bone density and structure

Applicable to

• Hyperostosis of bones, except skull
• Osteosclerosis, acquired

Excludes1 (never code together)

• diffuse idiopathic skeletal hyperostosis [DISH] (M48.1)
• osteosclerosis congenita (Q77.4)
• osteosclerosis fragilitas (generalista) (Q78.2)
• osteosclerosis myelofibrosis (D75.81)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 733.90 Disorder of bone and cartilage, unspecified (approximate)
• 733.99 Other disorders of bone and cartilage (approximate)

Nearby codes

• M85.672 Other cyst of bone, left ankle and foot
• M85.679 Other cyst of bone, unspecified ankle and foot
• M85.68 Other cyst of bone, other site
• M85.69 Other cyst of bone, multiple sites
• M85.8 Other specified disorders of bone density and structure
• M85.80 Other specified disorders of bone density and structure, unspecified site (this code)
• M85.81 Other specified disorders of bone density and structure, shoulder
• M85.811 Other specified disorders of bone density and structure, right shoulder
• M85.812 Other specified disorders of bone density and structure, left shoulder
• M85.819 Other specified disorders of bone density and structure, unspecified shoulder
• M85.82 Other specified disorders of bone density and structure, upper arm