All ICD10 Codes
M87Not billable, use a more specific code below

Osteonecrosis

In Other osteopathies (M86-M90), chapter 13: Diseases of the Musculoskeletal System and Connective Tissue

217 billable codes under M87: all are a CC; 173 map to HCC 92 (Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.

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Instructional notes

Includes: conditions that are coded here

  • avascular necrosis of bone

Excludes1: not coded here, use a different code

Use additional code: add a second code for this, listed after this one

  • code to identify major osseous defect, if applicable (M89.7-)

Also applies, from Other osteopathies (M86-M90)

These notes sit on M86-M90 and apply to every code under it, including M87.

Excludes1: not coded here, use a different code

  • postprocedural osteopathies (M96.-)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers site and laterality, acute injury versus chronic musculoskeletal conditions, 7th characters for pathologic fractures, osteoporosis with or without current fracture, and multisystem inflammatory syndrome.

Read Section I.C.13 (page 60)

All codes under M87

M87 can't be used on a claim. Pick a billable code below; grey headings group them.

M87 MS-DRGs

As the principal diagnosis, all 217 billable codes under M87 group to MS-DRG 553 or 554 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to M87

Notes on these codes point to M87.

  • M89.7 Code First: aseptic necrosis of bone (M87.-)
  • M89.7 Code First: osteonecrosis (M87.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Osteonecrosis

Osteonecrosis is a disease caused by reduced blood flow to bones in the joints. In people with healthy bones, new bone is always replacing old bone. In osteonecrosis, the lack of blood causes the bone to break down faster than the body can make enough new bone. The bone starts to die and may break down.

Read more about osteonecrosis on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.