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ICD-10-CM 2027 diagnosis code

M89.56Osteolysis, lower leg

Not billable — use a more specific code

M89.56 is a header code, so it can't be reported by itself. Choose one of the 3 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 M89.56

M89.56 is the ICD-10-CM diagnosis code for osteolysis, lower leg. It belongs to category M89 (other disorders of bone), 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 3 subcodes must be used instead.

Within M89.5 (osteolysis), M89.56 is specifically for osteolysis, lower leg. Related codes cover unspecified site (M89.50), shoulder (M89.51), upper arm (M89.52), forearm (M89.53), hand (M89.54), thigh (M89.55), ankle and foot (M89.57), other site (M89.58) and 1 more.

To report this condition, pick the subcode that matches the documentation: M89.561 (leg), M89.562 (leg) and M89.569 (leg).

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 M89.56

Notes that apply from higher levels

Instructions written at a parent level also apply to M89.56.

› From M89.5 Osteolysis
Excludes2
  • periprosthetic osteolysis of internal prosthetic joint (T84.05-)
Use additional code
  • code to identify major osseous defect, if applicable (M89.7-)

Broader instructions also apply from M86-M90 Other osteopathies and Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to M89.56.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about M89.56

Is M89.56 billable?

No. M89.56 is a header code. Report one of its more specific subcodes instead.