M90.5

Non-billable

Osteonecrosis in diseases classified elsewhere

M90.5 is the ICD-10-CM code for Osteonecrosis in diseases classified elsewhere. It is a non-billable category code — use a more specific child code such as M90.50 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Parent
M90
Subcodes
10
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

Code first

  • underlying disease, such as:
  • caisson disease (T70.3)
  • hemoglobinopathy (D50-D64)

Frequently asked questions

What is ICD-10 code M90.5?
M90.5 is the ICD-10-CM code for "Osteonecrosis in diseases classified elsewhere". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M90.5 a billable code?
No — M90.5 is a non-billable header code. Use a more specific child code (such as M90.50) for billing.
What are the subcodes of M90.5?
M90.5 has 10 more specific child codes, including M90.50, M90.51, M90.52.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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