2026 ICD-10-CM Diagnosis Code M54.01Panniculitis affecting regions of neck and back, occipito-atlanto-axial region

ICD-10-CM Codes›M00–M99›M50-M54›M54

ICD-10-CM M54.01
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M54.01 is a billable ICD-10-CM diagnosis code for panniculitis affecting regions of neck and back, occipito-atlanto-axial region. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified connective tissue disease.

Code Identity

ICD-10-CM Code
M54.01
Billable Status
Yes — Valid for Submission
Code Describes
Panniculitis affecting regions of neck and back, occipito-atlanto-axial region
Short Description
Panniculitis aff regions of neck/bk, occipt-atlan-ax region
Parent Code
M54.0
Panniculitis affecting regions of neck and back

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM50-M54Other dorsopathies
CategoryM54Dorsalgia
This CodeM54.01Panniculitis affecting regions of neck and back, occipito-atlanto-axial region

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.

    • Panniculitis(nodular) (nonsuppurative)
      • back
        • occipito-atlanto-axial region
    • Panniculitis(nodular) (nonsuppurative)
      • neck
        • occipito-atlanto-axial region

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

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 M54.01 to ICD-9-CMHistory

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

ICD-9-CM
723.6 Panniculitis of neck
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 M54.01Overview

Is M54.01 (Panniculitis affecting regions of neck and back) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report panniculitis affecting regions of neck and back, occipito-atlanto-axial region on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M54.01 group to?

When panniculitis affecting regions of neck and back, occipito-atlanto-axial region is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M54.01?

Under the General Equivalence Mappings, panniculitis affecting regions of neck and back, occipito-atlanto-axial region converts to ICD-9-CM 723.6 (panniculitis of neck). 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.