ICD-10-CM 2027
ICD-10 code for condensans osteitis
From the official ICD-10-CM alphabetic index entry “Osteitis › condensans”. Page updated September 29, 2026.
About coding condensans osteitis
The ICD-10-CM code for condensans osteitis is M85.30 (Osteitis condensans, unspecified site). The official index lists 15 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M85.30.
Within M85.3, choose M85.30 (unspecified site) only when documentation doesn't support a more specific option: shoulder (M85.31), upper arm (M85.32), forearm (M85.33), hand (M85.34), thigh (M85.35), lower leg (M85.36), ankle and foot (M85.37), other site (M85.38) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 553 (Bone Diseases and Arthropathies with MCC, relative weight 1.2494) and DRG 554 (Bone Diseases and Arthropathies without MCC, relative weight 0.8331), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific condensans osteitis codes (official index)
- ankle M85.37 — Osteitis condensans, ankle and foot
- foot M85.37 — Osteitis condensans, ankle and foot
- forearm M85.33 — Osteitis condensans, forearm
- hand M85.34 — Osteitis condensans, hand
- lower leg M85.36 — Osteitis condensans, lower leg
- multiple site M85.39 — Osteitis condensans, multiple sites
- neck M85.38 — Osteitis condensans, other site
- rib M85.38 — Osteitis condensans, other site
- shoulder M85.31 — Osteitis condensans, shoulder
- skull M85.38 — Osteitis condensans, other site
- specified site NEC M85.38 — Osteitis condensans, other site
- thigh M85.35 — Osteitis condensans, thigh
- toe M85.37 — Osteitis condensans, ankle and foot
- upper arm M85.32 — Osteitis condensans, upper arm
- vertebra M85.38 — Osteitis condensans, other site
Common questions about condensans osteitis ICD-10 codes
What is the ICD-10 code for condensans osteitis?
- M85.30 — Osteitis condensans, unspecified site. More specific codes apply when the documentation supports them: M85.37, M85.37, M85.33, M85.34 and others below.
What is the ICD-10 code for ankle condensans osteitis?
- M85.37 — Osteitis condensans, ankle and foot (header code; choose a more specific subcode).
What is the ICD-10 code for foot condensans osteitis?
- M85.37 — Osteitis condensans, ankle and foot (header code; choose a more specific subcode).
What is the ICD-10 code for forearm condensans osteitis?
- M85.33 — Osteitis condensans, forearm (header code; choose a more specific subcode).
What is the ICD-10 code for hand condensans osteitis?
- M85.34 — Osteitis condensans, hand (header code; choose a more specific subcode).
What is the ICD-10 code for lower leg condensans osteitis?
- M85.36 — Osteitis condensans, lower leg (header code; choose a more specific subcode).
What is the ICD-10 code for multiple site condensans osteitis?
- M85.39 — Osteitis condensans, multiple sites.
Is M85.30 billable?
- Yes. M85.30 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M85.30 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M85.30 as a principal diagnosis.
Is M85.30 a CC or MCC?
- No. M85.30 is neither a CC nor an MCC under MS-DRG v44.0.