2027 ICD-10-CM Diagnosis Code M25.331Other instability, right wrist

ICD-10-CM Codes›M00–M99›M20-M25›M25

ICD-10-CM M25.331
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M25.331 is a billable ICD-10-CM diagnosis code for other instability, right wrist. 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 bilateral instability of wrist joints. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified joint disorders.

Code Identity

ICD-10-CM Code
M25.331
Billable Status
Yes — Valid for Submission
Code Describes
Other instability, right wrist
Short Description
Other instability, right wrist
Same as the full description in the CMS dataset.
Parent Code
M25.33
Other instability, wrist

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM20-M25Other joint disorders
CategoryM25Other joint disorder, not elsewhere classified
This CodeM25.331Other instability, right wrist

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral instability of wrist joints
  • Instability of joint of right wrist
  • Wrist joint unstable

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M25.331: its own notes plus those printed at M25.3, M25, block M00-M25, block M20-M25, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block M00-M25 applies to 2,249 codes
  • Disorders affecting predominantly peripheral (limb) joints

Excludes1

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

From M25.3 Other instability of joint applies to 26 codes
  • instability of joint secondary to old ligament injury (M24.2-)
  • instability of joint secondary to removal of joint prosthesis (M96.8-)

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 M25.3 Other instability of joint applies to 26 codes
From M25 Other joint disorder, not elsewhere classified applies to 225 codes
  • abnormality of gait and mobility (R26.-)
  • acquired deformities of limb (M20-M21)
  • calcification of bursa (M71.4-)
  • calcification of shoulder (joint) (M75.3)
  • calcification of tendon (M65.2-)
  • difficulty in walking (R26.2)
  • temporomandibular joint disorder (M26.6-)
From Block M20-M25 Other joint disorders applies to 719 codes
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)

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.

Clinical ClassificationClinical

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

CCSR MUS007
Other specified joint disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Wrist Injuries and Disorders

Your wrist connects your hand to your forearm. It is not one big joint; it has several small joints. This makes it flexible and allows you to move your hand in different ways. The wrist has two big forearm bones and eight small bones known as carpals. It also has tendons and ligaments, which are connective tissues.

The full article covers:

  • What are the types of wrist injuries and disorders?
  • Who is at risk for wrist injuries and disorders?
  • What are the symptoms of wrist injuries and disorders?
  • How are wrist injuries and disorders diagnosed?
  • What are the treatments for wrist injuries and disorders?
  • Can wrist injuries and disorders be prevented?

Read the full article at MedlinePlus

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

Convert M25.331 to ICD-9-CMHistory

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

ICD-9-CM
718.83 Jt derangmnt NEC-forearm
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 M25.331Overview

What is the ICD-10 code for other instability, right wrist?

The ICD-10-CM code for other instability, right wrist is M25.331 (sometimes written as M25331). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is M25.331 (Other instability, wrist) a billable code?

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

What MS-DRG does M25.331 group to?

When other instability, right wrist 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 M25.331 be reported with a code from M24.2?

Not as a rule. The Excludes1 note at M25.3, which applies to M25.331, lists "instability of joint secondary to old ligament injury (M24.2-)". 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).

What is the ICD-9 equivalent of M25.331?

Under the General Equivalence Mappings, other instability, right wrist converts to ICD-9-CM 718.83 (jt derangmnt NEC-forearm). The mapping is approximate, so confirm the match fits the documentation.