2027 ICD-10-CM Diagnosis Code M79.3Panniculitis, unspecified
ICD-10-CM Codes›M00–M99›M70-M79›M79
- Billable — Valid for Submission
- Not Chronic
M79.3 is a billable ICD-10-CM diagnosis code for panniculitis, 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. 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.
- Acquired partial lipodystrophy
- Acute panniculitis
- Calcific panniculitis
- Cold panniculitis
- Cytophagic histiocytic panniculitis
- Drug-induced panniculitis
- Eosinophilic panniculitis
- Factitial panniculitis
- Infantile onset panniculitis with uveitis and systemic granulomatosis
- Infective panniculitis
- Lipoatrophic panniculitis
- Lipophagic panniculitis
- Lobular panniculitis
- Neonatal cold panniculitis
- Neonatal disorder of subcutaneous fat
- Neonatal panniculitis
- Nodular panniculitis
- Nutritional steatitis
- Panniculitis
- Panniculitis caused by corticosteroid therapy
- Panniculitis due to action of lipolytic enzymes
- Panniculitis due to alpha-1 anti-trypsin deficiency
- Panniculitis due to cholesterol emboli
- Panniculitis due to crystal deposition
- Panniculitis due to hyperuricemia
- Panniculitis due to immunological disorder
- Panniculitis due to physical factor
- Panniculitis induced localized lipodystrophy
- Panniculitis secondary to histiocytic disorder
- Panniculitis secondary to malignancy
- Panniculitis secondary to pancreatic disease
- Panniculitis with complement deficiency
- Pressure panniculitis
- Septal panniculitis
- Subcutaneous calcification
- Traumatic complication of procedure
- Traumatic fat necrosis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M79.3: its own notes plus those printed at M79 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.
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 M79.3, its category, or a range that includes it.
Excludes1 3
These codes carry an Excludes1 note naming M79.3: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 1
These codes carry an Excludes2 note naming M79.3: its condition is not part of those codes, and both may be reported when the patient has both.
- Block L00-L08 Infections of the skin and subcutaneous tissuepanniculitis NOS (M79.3)
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Lipodermatosclerosis See Also: Insufficiency, venous; M79.3
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Panniculitis
general term for inflammation of adipose tissue, usually of the skin, characterized by reddened subcutaneous nodules.
Convert M79.3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M79.3Overview
What is the ICD-10 code for panniculitis, unspecified?
The ICD-10-CM code for panniculitis, unspecified is M79.3 (sometimes written as M793). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M79.3 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report panniculitis, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M79.3 group to?
When panniculitis, 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 M79.3 be reported with L93.2?
Not as a rule. The Excludes1 note on M79.3 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 M79.3?
Under the General Equivalence Mappings, panniculitis, unspecified converts to ICD-9-CM 729.30 (panniculitis, unsp site). The mapping is approximate, so confirm the match fits the documentation.
