2026 ICD-10-CM Diagnosis Code M89.039Algoneurodystrophy, unspecified forearm

ICD-10-CM Codes›M00–M99›M86-M90›M89

ICD-10-CM M89.039
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M89.039 is a billable ICD-10-CM diagnosis code for algoneurodystrophy, unspecified forearm. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 564 through 566. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified bone disease and musculoskeletal deformities.

Code Identity

ICD-10-CM Code
M89.039
Billable Status
Yes — Valid for Submission
Code Describes
Algoneurodystrophy, unspecified forearm
Short Description
Algoneurodystrophy, unspecified forearm
Same as the full description in the CMS dataset.
Parent Code
M89.03
Algoneurodystrophy, forearm

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM86-M90Other osteopathies
CategoryM89Other disorders of bone
This CodeM89.039Algoneurodystrophy, unspecified forearm

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

Patient EducationClinical

Complex Regional Pain Syndrome

Complex regional pain syndrome (CRPS) is a chronic pain condition. It causes intense pain, usually in the arms, hands, legs, or feet. It may happen after an injury, either to a nerve or to tissue in the affected area. Rest and time may only make it worse.

Read the full article at MedlinePlus

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Convert M89.039 to ICD-9-CMHistory

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

ICD-9-CM
733.7 Algoneurodystrophy
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M89.039Overview

Is M89.039 (Algoneurodystrophy, forearm) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report algoneurodystrophy, unspecified forearm on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M89.039 group to?

When algoneurodystrophy, unspecified forearm is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 565, 566, with relative weights from 0.7493 to 1.5436 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M89.039?

Under the General Equivalence Mappings, algoneurodystrophy, unspecified forearm converts to ICD-9-CM 733.7 (algoneurodystrophy). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.