2027 ICD-10-CM Diagnosis Code M54.00Panniculitis affecting regions of neck and back, site unspecified
ICD-10-CM Codes›M00–M99›M50-M54›M54
- Billable — Valid for Submission
- Not Chronic
M54.00 is a billable ICD-10-CM diagnosis code for panniculitis affecting regions of neck and back, site unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 606 through 607. Coders also document this condition as panniculitis affecting back. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified connective tissue disease.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Panniculitis affecting back
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M54.00: its own notes plus those printed at M54.0, M54, block M50-M54, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- current injury - see injury of spine by body region
- discitis NOS (M46.4-)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Notes
General instructions on how these codes are used.
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name M54.00, its category, or a range that includes it.
Excludes1 4
These codes carry an Excludes1 note naming M54.00: they are not reported together with it, unless the two conditions are unrelated.
- G55 Nerve root and plexus compressions in diseases classified elsewherenerve root compression (due to) (in) dorsopathies (M53.-, M54.-) names M54.-, which includes this code
- L95 Vasculitis limited to skin, not elsewhere classifiedpanniculitis of neck and back (M54.0-) names M54.0-, which includes this code
- M79.3 Panniculitis, unspecifiedneck and back panniculitis (M54.0-) names M54.0-, which includes this code
- R52 Pain, unspecifiedspine pain (M54.-) names M54.-, which includes this code
Excludes2 3
These codes carry an Excludes2 note naming M54.00: its condition is not part of those codes, and both may be reported when the patient has both.
- G89 Pain, not elsewhere classifiedspine pain (M54.-) names M54.-, which includes this code
- Block L00-L08 Infections of the skin and subcutaneous tissuepanniculitis of neck and back (M54.0-) names M54.0-, which includes this code
- R10 Abdominal and pelvic paindorsalgia (M54.-) names M54.-, which includes this code
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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 M54.00 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M54.00Overview
What is the ICD-10 code for panniculitis affecting regions of neck and back, site unspecified?
The ICD-10-CM code for panniculitis affecting regions of neck and back, site unspecified is M54.00 (sometimes written as M5400). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M54.00 (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, site unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M54.00 group to?
When panniculitis affecting regions of neck and back, site unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 607, 606, with relative weights from 0.8772 to 1.5721 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M54.00 be reported with L93.2?
Not as a rule. The Excludes1 note at M54.0, which applies to M54.00, lists "lupus panniculitis (L93.2)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of M54.00?
Under the General Equivalence Mappings, panniculitis affecting regions of neck and back, site unspecified converts to ICD-9-CM 723.6 (panniculitis of neck). The mapping is approximate, so confirm the match fits the documentation.
