ICD-10-CM 2027 diagnosis code
L02.431Carbuncle of right axilla
L02.431 is a valid, billable ICD-10-CM code for carbuncle of right axilla. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
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 L02.431
L02.431 is the ICD-10-CM diagnosis code for carbuncle of right axilla. It belongs to category L02 (cutaneous abscess, furuncle and carbuncle), block L00-L08 (infections of the skin and subcutaneous tissue) and chapter 12 (diseases of the skin and subcutaneous 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 L02.43 (carbuncle of limb), L02.431 is specifically for carbuncle of right axilla. Related codes cover left axilla (L02.432), right upper limb (L02.433), left upper limb (L02.434), right lower limb (L02.435), left lower limb (L02.436) and unspecified (L02.439).
Use an additional code to identify organism (B95-B96).
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 602 (Cellulitis with MCC, relative weight 1.4273) and DRG 603 (Cellulitis without MCC, relative weight 0.8635), 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 680.3 (carbuncle and furuncle of upper arm and forearm).
Notes that apply from higher levels
Instructions written at a parent level also apply to L02.431.
Broader instructions also apply from L00-L08 Infections of the skin and subcutaneous tissue and Chapter 12: Diseases of the skin and subcutaneous tissue.
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 →- 680.3Carbuncle and furuncle of upper arm and forearmapproximate
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 L02.431
Is L02.431 billable?
- Yes. L02.431 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L02.431 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L02.431 as a principal diagnosis.
Is L02.431 a CC or MCC?
- No. L02.431 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does L02.431 group to?
- L02.431 is used in the MS-DRG v44.0 logic for MS-DRG 602 (Cellulitis with MCC) and MS-DRG 603 (Cellulitis 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 L02.431?
- The CMS General Equivalence Mappings map L02.431 to ICD-9-CM 680.3.