2026 ICD-10-CM Diagnosis Code L03.112Cellulitis of left axilla

ICD-10-CM Codes›L00–L99›L00-L08›L03

ICD-10-CM L03.112
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L03.112 is a billable ICD-10-CM diagnosis code for cellulitis 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 cellulitis of axilla. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Skin and subcutaneous tissue infections.

Code Identity

ICD-10-CM Code
L03.112
Billable Status
Yes — Valid for Submission
Code Describes
Cellulitis of left axilla
Short Description
Cellulitis of left axilla
Same as the full description in the CMS dataset.
Parent Code
L03.11
Cellulitis of other parts of limb

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL00-L08Infections of the skin and subcutaneous tissue
CategoryL03Cellulitis and acute lymphangitis
This CodeL03.112Cellulitis of left axilla

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cellulitis of axilla
  • Cellulitis of left axilla
  • Cellulitis of left shoulder
  • Cellulitis of shoulder

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

Cellulitis

Cellulitis is an infection of the skin and deep underlying tissues. Group A strep (streptococcal) bacteria are the most common cause. The bacteria enter your body when you get an injury such as a bruise, burn, surgical cut, or wound.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert L03.112 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 L03.112Overview

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

The ICD-10-CM code for cellulitis of left axilla is L03.112 (sometimes written as L03112). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is L03.112 (Cellulitis of other parts of limb) a billable code?

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

What MS-DRG does L03.112 group to?

When cellulitis 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 L03.112 a CC or MCC?

CMS lists L03.112 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 L03.112?

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