ICD-10-CM 2027 diagnosis code
M79.3Panniculitis, unspecified
M79.3 is a valid, billable ICD-10-CM code for panniculitis, unspecified. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Panniculitis, ICD-10 code for Lipodermatosclerosis.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About M79.3
M79.3 is the ICD-10-CM diagnosis code for panniculitis, unspecified. It belongs to category M79 (other and unspecified soft tissue disorders, not elsewhere classified), block M70-M79 (other soft tissue disorders) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within M79, choose M79.3 (Panniculitis, unspecified) only when documentation doesn't support a more specific option: rheumatism, unspecified (M79.0), myalgia (M79.1), neuralgia and neuritis, unspecified (M79.2), hypertrophy of (infrapatellar) fat pad (M79.4), residual foreign body in soft tissue (M79.5), pain in limb, hand, foot, fingers and toes (M79.6), Fibromyalgia (M79.7), other specified soft tissue disorders (M79.8) and 2 more.
Don't report M79.3 together with the conditions in its Excludes1 note: lupus panniculitis (L93.2), neck and back panniculitis (M54.0-) and relapsing [Weber-Christian] panniculitis (M35.6).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 729.30 (panniculitis, unspecified site).
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to M79.3.
Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.
Alphabetic index entries
2 entriesTerms in the official ICD-10-CM index that lead to M79.3.
Codes whose notes reference M79.3
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 09 · Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast
ICD-9-CM equivalent
Converter →- 729.30Panniculitis, unspecified siteapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about M79.3
Is M79.3 billable?
- Yes. M79.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M79.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M79.3 as a principal diagnosis.
Is M79.3 a CC or MCC?
- No. M79.3 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does M79.3 group to?
- M79.3 is used in the MS-DRG v44.0 logic for MS-DRG 606 (Minor Skin Disorders with MCC) and MS-DRG 607 (Minor Skin Disorders without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for M79.3?
- The CMS General Equivalence Mappings map M79.3 to ICD-9-CM 729.30.