What does ICD-10 code M87.87 mean?

ICD-10 code M87.87 is the standardized code used for other osteonecrosis, ankle, foot and toes in medical records and coding systems.

When is ICD-10 code M87.87 used?

Doctors, hospitals, and insurers may use ICD-10 code M87.87 when recording other osteonecrosis, ankle, foot and toes in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code M87.87 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code M87.87: Other osteonecrosis, ankle, foot and toes

Name: ICD-10 Code M87.87: Other osteonecrosis, ankle, foot and toes
Creator: HealthAssure Clinical Team
Published: 2026-05-26T05:25:39.445Z

M87.87 is an ICD-10 diagnosis entry used to group records related to Other osteonecrosis, ankle, foot and toes. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the musculoskeletal system and connective tissue (M00-M99).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the musculoskeletal system and connective tissue (M00-M99).

When is it used?

May be used when a clinician documents other osteonecrosis, ankle, foot and toes in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

13Diseases of the musculoskeletal system and connective tissue (M00-M99)

block

M80-M94Osteopathies and chondropathies

block

M86-M90Other osteopathies

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

Orthopedic SpecialistRheumatologist

Sibling codes

M87.80Other osteonecrosis, unspecified bonebillable M87.81Other osteonecrosis, shoulder M87.82Other osteonecrosis, humerus M87.83Other osteonecrosis of radius, ulna and carpus M87.84Other osteonecrosis, hand and fingers M87.85Other osteonecrosis, pelvis and femur M87.86Other osteonecrosis, tibia and fibula M87.88Other osteonecrosis, other sitebillable M87.89Other osteonecrosis, multiple sitesbillable

Mapped diagnoses and classifications

SNOMED_CT 1222676004high

Mueller Weiss syndrome

Source: SNOMED International ICD-10 map

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.

Legacy codes

M87.87

Replacement codes

M87.871 — Other osteonecrosis, right ankleM87.872 — Other osteonecrosis, left ankleM87.873 — Other osteonecrosis, unspecified ankleM87.874 — Other osteonecrosis, right footM87.875 — Other osteonecrosis, left footM87.876 — Other osteonecrosis, unspecified footM87.877 — Other osteonecrosis, right toe(s)M87.878 — Other osteonecrosis, left toe(s)M87.879 — Other osteonecrosis, unspecified toe(s)

Common synonyms

Other osteonecrosis, ankle, foot and toes

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.