2026 ICD-10-CM Diagnosis Code M76.9Unspecified enthesopathy, lower limb, excluding foot

ICD-10-CM Codes›M00–M99›M70-M79›M76

ICD-10-CM M76.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M76.9 is a billable ICD-10-CM diagnosis code for unspecified enthesopathy, lower limb, excluding foot. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 557 through 558. Coders also document this condition as enthesopathy of ankle AND/OR tarsus. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Tendon and synovial disorders.

Code Identity

ICD-10-CM Code
M76.9
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified enthesopathy, lower limb, excluding foot
Short Description
Unspecified enthesopathy, lower limb, excluding foot
Same as the full description in the CMS dataset.
Parent Code
M76
Enthesopathies, lower limb, excluding foot

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM70-M79Other soft tissue disorders
CategoryM76Enthesopathies, lower limb, excluding foot
This CodeM76.9Unspecified enthesopathy, lower limb, excluding foot

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Enthesopathy of ankle AND/OR tarsus
  • Enthesopathy of ankle region
  • Enthesopathy of hip region
  • Enthesopathy of left ankle
  • Enthesopathy of lower leg and ankle region
  • Enthesopathy of lower limb
  • Enthesopathy of right ankle
  • Observation hip syndrome

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Enthesopathy(peripheral)
      • lower limb (excluding foot)

Clinical ClassificationClinical

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

CCSR MUS009
Tendon and synovial disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Connective Tissue Disorders

Your connective tissue supports many different parts of your body, such as your skin, eyes, and heart. It is like a "cellular glue" that gives your body parts their shape and helps keep them strong. It also helps some of your tissues do their work. It is made of many kinds of proteins. Cartilage and fat are types of connective tissue.

Read the full article at MedlinePlus

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

Convert M76.9 to ICD-9-CMHistory

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

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

Questions About M76.9Overview

Is M76.9 (Enthesopathies, lower limb, excluding foot) a billable code?

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

What MS-DRG does M76.9 group to?

When unspecified enthesopathy, lower limb, excluding foot is the principal diagnosis on an inpatient stay, it groups to MS-DRG 557, 558, with relative weights from 0.8932 to 1.4869 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M76.9?

Under the General Equivalence Mappings, unspecified enthesopathy, lower limb, excluding foot converts to ICD-9-CM 726.8 (periph enthesopathy NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.