ICD-10-CM 2027 diagnosis code
M87.87Other osteonecrosis, ankle, foot and toes
M87.87 is a header code, so it can't be reported by itself. Choose one of the 9 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About M87.87
M87.87 is the ICD-10-CM diagnosis code for other osteonecrosis, ankle, foot and toes. It belongs to category M87 (osteonecrosis), block M86-M90 (other osteopathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.
Within M87.8 (other osteonecrosis), M87.87 is specifically for other osteonecrosis, ankle, foot and toes. Related codes cover unspecified bone (M87.80), shoulder (M87.81), humerus (M87.82), of radius, ulna and carpus (M87.83), hand and fingers (M87.84), pelvis and femur (M87.85), tibia and fibula (M87.86), other site (M87.88) and 1 more.
To report this condition, pick the subcode that matches the documentation: M87.871 (ankle), M87.872 (ankle), M87.873 (ankle), M87.874 (foot), M87.875 (foot), M87.876 (foot), M87.877 (toe(s)), M87.878 (toe(s)) and 1 more.
Use an additional code to identify major osseous defect, if applicable (M89.7-).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under M87.87
- M87.871Other osteonecrosis, right ankleBillable
- M87.872Other osteonecrosis, left ankleBillable
- M87.873Other osteonecrosis, unspecified ankleBillable
- M87.874Other osteonecrosis, right footBillable
- M87.875Other osteonecrosis, left footBillable
- M87.876Other osteonecrosis, unspecified footBillable
- M87.877Other osteonecrosis, right toe(s)Billable
- M87.878Other osteonecrosis, left toe(s)Billable
- M87.879Other osteonecrosis, unspecified toe(s)Billable
Notes that apply from higher levels
Instructions written at a parent level also apply to M87.87.
› From M87 Osteonecrosis
Broader instructions also apply from M86-M90 Other osteopathies and Chapter 13: Diseases of the musculoskeletal system and connective tissue.
Alphabetic index entries
3 entriesTerms in the official ICD-10-CM index that lead to M87.87.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about M87.87
Is M87.87 billable?
- No. M87.87 is a header code. Report one of its more specific subcodes instead.