2026 ICD-10-CM Diagnosis Code L03.329Acute lymphangitis of trunk, unspecified
ICD-10-CM Codes›L00–L99›L00-L08›L03
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
L03.329 is a billable ICD-10-CM diagnosis code for acute lymphangitis of trunk, unspecified. 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 acute lymphangitis of trunk. 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.
- Acute lymphangitis of trunk
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
Bacterial Infections
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The full article covers:
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- How do bacterial infections spread?
- What are the treatments for bacterial infections?
- Can bacterial infections be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert L03.329 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About L03.329Overview
What is the ICD-10 code for acute lymphangitis of trunk, unspecified?
The ICD-10-CM code for acute lymphangitis of trunk, unspecified is L03.329 (sometimes written as L03329). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is L03.329 (Acute lymphangitis of trunk) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report acute lymphangitis of trunk, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does L03.329 group to?
When acute lymphangitis of trunk, unspecified 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 L03.329 a CC or MCC?
CMS lists L03.329 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 L03.329?
Under the General Equivalence Mappings, acute lymphangitis of trunk, unspecified converts to ICD-9-CM 682.2 (cellulitis of trunk). The mapping is approximate, so confirm the match fits the documentation.
