2026 ICD-10-CM Diagnosis Code M24.042Loose body in left finger joint(s)

ICD-10-CM Codes›M00–M99›M20-M25›M24

ICD-10-CM M24.042
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M24.042 is a billable ICD-10-CM diagnosis code for loose body in left finger joint(s). 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. Coders also document this condition as loose body in joint of hand. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified joint disorders.

Code Identity

ICD-10-CM Code
M24.042
Billable Status
Yes — Valid for Submission
Code Describes
Loose body in left finger joint(s)
Short Description
Loose body in left finger joint(s)
Same as the full description in the CMS dataset.
Parent Code
M24.04
Loose body in finger joints

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM20-M25Other joint disorders
CategoryM24Other specific joint derangements
This CodeM24.042Loose body in left finger joint(s)

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Loose body in joint of hand
  • Loose body of joint of finger
  • Loose body of joint of left finger
  • Loose body of joint of left hand

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

Finger Injuries and Disorders

You use your fingers and thumbs to do everything from grasping objects to playing musical instruments to typing. When there is something wrong with them, it can make life difficult. Common problems include:

Read the full article at MedlinePlus

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

Convert M24.042 to ICD-9-CMHistory

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

ICD-9-CM
718.14 Loose body-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 M24.042Overview

Is M24.042 (Loose body in finger joints) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report loose body in left finger joint(s) on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M24.042 group to?

When loose body in left finger joint(s) 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 M24.042?

Under the General Equivalence Mappings, loose body in left finger joint(s) converts to ICD-9-CM 718.14 (loose body-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.