2026 ICD-10-CM Diagnosis Code M24.649Ankylosis, unspecified hand

ICD-10-CM Codes›M00–M99›M20-M25›M24

ICD-10-CM M24.649
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M24.649 is a billable ICD-10-CM diagnosis code for ankylosis, unspecified hand. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 553 through 554. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified joint disorders.

Code Identity

ICD-10-CM Code
M24.649
Billable Status
Yes — Valid for Submission
Code Describes
Ankylosis, unspecified hand
Short Description
Ankylosis, unspecified hand
Same as the full description in the CMS dataset.
Parent Code
M24.64
Ankylosis, hand

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM20-M25Other joint disorders
CategoryM24Other specific joint derangements
This CodeM24.649Ankylosis, unspecified hand

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Ankylosis of distal interphalangeal joint
  • Ankylosis of joint of finger
  • Ankylosis of joint of hand
  • Ankylosis of metacarpophalangeal joint
  • Ankylosis of proximal interphalangeal joint
  • Arthrofibrosis of joint of hand
  • Congenital ankylosis of distal interphalangeal joint of index finger
  • Congenital ankylosis of distal interphalangeal joint of little finger
  • Congenital ankylosis of distal interphalangeal joint of middle finger
  • Congenital ankylosis of distal interphalangeal joint of ring finger
  • Congenital ankylosis of interphalangeal joint of finger
  • Congenital ankylosis of interphalangeal joint of hand
  • Congenital ankylosis of interphalangeal joint of index finger
  • Congenital ankylosis of interphalangeal joint of little finger
  • Congenital ankylosis of interphalangeal joint of middle finger
  • Congenital ankylosis of interphalangeal joint of ring finger
  • Congenital ankylosis of interphalangeal joint of thumb
  • Congenital ankylosis of metacarpophalangeal joint of index finger
  • Congenital ankylosis of metacarpophalangeal joint of little finger
  • Congenital ankylosis of metacarpophalangeal joint of middle finger
  • Congenital ankylosis of metacarpophalangeal joint of ring finger
  • Congenital ankylosis of proximal interphalangeal joint of index finger
  • Congenital ankylosis of proximal interphalangeal joint of little finger
  • Congenital ankylosis of proximal interphalangeal joint of middle finger
  • Congenital ankylosis of proximal interphalangeal joint of ring finger
  • Distal interphalangeal joint symphalangism
  • Proximal interphalangeal joint symphalangism

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

Hand Injuries and Disorders

No matter how old you are or what you do for a living, you are always using your hands. When there is something wrong with them, you may not be able to do your regular activities.

Read the full article at MedlinePlus

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

Convert M24.649 to ICD-9-CMHistory

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

ICD-9-CM
718.54 Ankylosis-hand
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 M24.649Overview

Is M24.649 (Ankylosis, hand) a billable code?

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

What MS-DRG does M24.649 group to?

When ankylosis, unspecified hand is the principal diagnosis on an inpatient stay, it groups to MS-DRG 553, 554, with relative weights from 0.8301 to 1.2963 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M24.649?

Under the General Equivalence Mappings, ankylosis, unspecified hand converts to ICD-9-CM 718.54 (ankylosis-hand). 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.