2026 ICD-10-CM Diagnosis Code L03.311Cellulitis of abdominal wall
ICD-10-CM Codes›L00–L99›L00-L08›L03
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
L03.311 is a billable ICD-10-CM diagnosis code for cellulitis of abdominal wall. 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 67 closely related codes. Coders also document this condition as abscess of abdominal wall. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Skin and subcutaneous tissue infections.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Abscess of abdominal wall
- Cellulitis and abscess of abdominal wall
- Cellulitis and abscess of trunk
- Cellulitis of abdominal wall
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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
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Convert L03.311 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About L03.311Overview
What is the ICD-10 code for cellulitis of abdominal wall?
The ICD-10-CM code for cellulitis of abdominal wall is L03.311 (sometimes written as L03311). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is L03.311 (Cellulitis of trunk) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report cellulitis of abdominal wall on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does L03.311 group to?
When cellulitis of abdominal wall 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 L03.311 a CC or MCC?
CMS lists L03.311 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 67 closely related codes in its exclusion list.
What is the ICD-9 equivalent of L03.311?
Under the General Equivalence Mappings, cellulitis of abdominal wall converts to ICD-9-CM 682.2 (cellulitis of trunk). The mapping is approximate, so confirm the match fits the documentation.
