M87.350 Other secondary osteonecrosis, pelvis

ICD-10-CM M87.350: Other Secondary Osteonecrosis, Pelvis

ICD-10-CM code M87.350 designates other secondary osteonecrosis of the pelvis. Osteonecrosis is a degenerative bone condition involving bone cell death due to interrupted subchondral blood supply. This active diagnosis code appears in Medicare billing articles for hip arthroplasty and maps to risk adjustment models. 1 2 3 5

Plain-language overview

Osteonecrosis is a degenerative bone condition defined by the death of cellular components of bone secondary to an interruption of the subchondral blood supply. 2

Osteonecrosis is also known as avascular necrosis, aseptic necrosis, and ischemic bone necrosis, providing alternative names for this degenerative bone condition. 2

What this code represents

M87.350 is an active ICD-10-CM diagnosis code with the preferred name other secondary osteonecrosis, pelvis, and its semantic type is classified as a pathologic function. 1

The parent concept for M87.350 is M87.35, representing other secondary osteonecrosis of the pelvis and femur within the ICD-10-CM terminology hierarchy. 1

Coding details

For the current effective period, ICD-10-CM does not list inclusion terms, exclusion notes, or sequencing instructions like Code First or Use Additional for M87.350. 5

M87.350 is listed alongside M87.351 and M87.352, which distinguish other secondary osteonecrosis of the right femur and left femur respectively, while M87.350 specifies the pelvis. 3 4

Documentation considerations

The terminology record for M87.350 classifies it as a pathologic function, and billing articles list it separately from M87.351 and M87.352 for right and left femur osteonecrosis. 1 3

Coverage and utilization context

M87.350 appears in Medicare billing and coding articles for total hip arthroplasty alongside femur-specific osteonecrosis codes, and maps to bone necrosis categories under the CMS-HCC risk adjustment model. 3 4 5

What the sources add

While terminology records define M87.350 as an active diagnosis, billing articles place it within operational coding lists for hip procedures, and risk adjustment sources map it to bone necrosis categories. 1 3 5

Sources

1. ICD-10-CM M87.350 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Article - Billing and Coding: Total Hip Arthroplasty (A57683) — cms.gov; accessed 2026-07-27.
4. Article - Billing and Coding: Total Hip Arthroplasty (A57684) — cms.gov; accessed 2026-07-27.
5. 2026 ICD-10-CM M87.350: Other secondary | HCC 92 — hccbuddy.com; accessed 2026-07-27.