2026 ICD-10-CM Diagnosis Code M77.30Calcaneal spur, unspecified foot

ICD-10-CM Codes›M00–M99›M70-M79›M77

ICD-10-CM M77.30
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M77.30 is a billable ICD-10-CM diagnosis code for calcaneal spur, unspecified foot. 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 calcaneal spur. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified connective tissue disease.

Code Identity

ICD-10-CM Code
M77.30
Billable Status
Yes — Valid for Submission
Code Describes
Calcaneal spur, unspecified foot
Short Description
Calcaneal spur, unspecified foot
Same as the full description in the CMS dataset.
Parent Code
M77.3
Calcaneal spur

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM70-M79Other soft tissue disorders
CategoryM77Other enthesopathies
This CodeM77.30Calcaneal spur, unspecified foot

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Calcaneal spur
  • Postcalcaneal bursitis

Clinical ClassificationClinical

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

CCSR MUS025
Other specified connective tissue disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Bone Diseases

Your bones help you move, give you shape and support your body. They are living tissues that rebuild constantly throughout your life. During childhood and your teens, your body adds new bone faster than it removes old bone. After about age 20, you can lose bone faster than you make bone.

Read the full article at MedlinePlus

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

Convert M77.30 to ICD-9-CMHistory

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

ICD-9-CM
726.73 Calcaneal spur
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 M77.30Overview

Is M77.30 (Calcaneal spur) a billable code?

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

What MS-DRG does M77.30 group to?

When calcaneal spur, unspecified foot 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 M77.30?

Under the General Equivalence Mappings, calcaneal spur, unspecified foot converts to ICD-9-CM 726.73 (calcaneal spur). 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.