2027 ICD-10-CM Diagnosis Code M89.531Osteolysis, right forearm

ICD-10-CM Codes›M00–M99›M86-M90›M89

ICD-10-CM M89.531
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M89.531 is a billable ICD-10-CM diagnosis code for osteolysis, right forearm. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 564 through 566. Coders also document this condition as osteolysis of bilateral radii. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified bone disease and musculoskeletal deformities.

Code Identity

ICD-10-CM Code
M89.531
Billable Status
Yes — Valid for Submission
Code Describes
Osteolysis, right forearm
Short Description
Osteolysis, right forearm
Same as the full description in the CMS dataset.
Parent Code
M89.53
Osteolysis, forearm

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM86-M90Other osteopathies
CategoryM89Other disorders of bone
This CodeM89.531Osteolysis, right forearm

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Osteolysis of bilateral radii
  • Osteolysis of left radius
  • Osteolysis of radius
  • Osteolysis of right radius

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M89.531: its own notes plus those printed at M89.5, block M86-M90, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block M86-M90 Other osteopathies applies to 732 codes
  • postprocedural osteopathies (M96.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From M89.5 Osteolysis applies to 24 codes
  • periprosthetic osteolysis of internal prosthetic joint (T84.05-)
From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From M89.5 Osteolysis applies to 24 codes
  • code to identify major osseous defect, if applicable (M89.7-)

Notes

General instructions on how these codes are used.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name M89.531, its category, or a range that includes it.

Code First 1

These codes say to code first a condition named in the note, and M89.531 is one of the conditions named.

  • M89.7 Major osseous defect
    osteolysis (M89.5-) names M89.5-, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MUS028
Other specified bone disease and musculoskeletal deformities
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Osteolysis

    dissolution of bone that particularly involves the removal or loss of calcium.

Patient EducationClinical

Bone Diseases

Your bones help you move, give you shape and support your body. They are living tissues that rebuild constantly throughout your life. During childhood and your teens, your body adds new bone faster than it removes old bone. After about age 20, you can lose bone faster than you make bone.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert M89.531 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
733.99 Bone & cartilage dis NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M89.531Overview

What is the ICD-10 code for osteolysis, right forearm?

The ICD-10-CM code for osteolysis, right forearm is M89.531 (sometimes written as M89531). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is M89.531 (Osteolysis, forearm) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report osteolysis, right forearm on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does M89.531 group to?

When osteolysis, right forearm is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 566, 565, with relative weights from 0.7374 to 1.4909 depending on complications. Higher weights mean higher Medicare reimbursement.

Can M89.531 be reported with a code from M96?

Not as a rule. The Excludes1 note at block M86-M90, which applies to M89.531, lists "postprocedural osteopathies (M96.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

Does M89.531 need an additional code?

When the condition applies, yes. The Use Additional Code note at M89.5, which applies to M89.531, reads: code to identify major osseous defect, if applicable (M89.7-). The additional code is reported after M89.531.