MCMedicalCodingSoftware
Free trial
M90.55

M90.55: Osteonecrosis in diseases classified elsewhere, thigh

Non-billable headerICD-10-CM

M90.55 is a non-billable header ICD-10-CM code for osteonecrosis in diseases classified elsewhere, thigh. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above M90.55

A category’s note binds every code beneath it.

Written on M90: Osteopathies in diseases classified elsewhere

  • osteochondritis, osteomyelitis, and osteopathy (in):
  • cryptococcosis (B45.3)
  • diabetes mellitus (E08-E13 with .69-)
  • gonococcal (A54.43)
  • neurogenic syphilis (A52.11)
  • renal osteodystrophy (N25.0)
  • salmonellosis (A02.24)
  • secondary syphilis (A51.46)
  • syphilis (late) (A52.77)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead M90.55

3 child codes. Green means billable.

Other codes under M90.5

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.