2026 ICD-10-CM Diagnosis Code L02.412Cutaneous abscess of left axilla

ICD-10-CM Codes›L00–L99›L00-L08›L02

ICD-10-CM L02.412
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L02.412 is a billable ICD-10-CM diagnosis code for cutaneous abscess of left axilla. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 573 through 575, 602 through 603, 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 55 closely related codes. Coders also document this condition as abscess of axilla. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Skin and subcutaneous tissue infections.

Code Identity

ICD-10-CM Code
L02.412
Billable Status
Yes — Valid for Submission
Code Describes
Cutaneous abscess of left axilla
Short Description
Cutaneous abscess of left axilla
Same as the full description in the CMS dataset.
Parent Code
L02.41
Cutaneous abscess of limb

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL00-L08Infections of the skin and subcutaneous tissue
CategoryL02Cutaneous abscess, furuncle and carbuncle
This CodeL02.412Cutaneous abscess of left axilla

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abscess of axilla
  • Abscess of left axilla
  • Mass of left axillary region

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SKN001
Skin and subcutaneous tissue infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Abscess

An abscess is a pocket of pus. You can get an abscess almost anywhere in your body. When an area of your body becomes infected, your body's immune system tries to fight the infection. White blood cells go to the infected area, collect within the damaged tissue, and cause inflammation. During this process, pus forms.

Read the full article at MedlinePlus

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Convert L02.412 to ICD-9-CMHistory

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

ICD-9-CM
682.3 Cellulitis of arm
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 L02.412Overview

What is the ICD-10 code for cutaneous abscess of left axilla?

The ICD-10-CM code for cutaneous abscess of left axilla is L02.412 (sometimes written as L02412). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is L02.412 (Cutaneous abscess of limb) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report cutaneous abscess of left axilla on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does L02.412 group to?

When cutaneous abscess of left axilla is the principal diagnosis on an inpatient stay, it groups to MS-DRG 573, 574, 575, 602, 603, 791, 793, with relative weights from 0.8709 to 6.5514 depending on complications. Higher weights mean higher Medicare reimbursement.

Is L02.412 a CC or MCC?

CMS lists L02.412 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 55 closely related codes in its exclusion list.

What is the ICD-9 equivalent of L02.412?

Under the General Equivalence Mappings, cutaneous abscess of left axilla converts to ICD-9-CM 682.3 (cellulitis of arm). The mapping is approximate, so confirm the match fits the documentation.