2026 ICD-10-CM Diagnosis Code L03.126Acute lymphangitis of left lower limb

ICD-10-CM Codes›L00–L99›L00-L08›L03

ICD-10-CM L03.126
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L03.126 is a billable ICD-10-CM diagnosis code for acute lymphangitis of left lower limb. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Skin and subcutaneous tissue infections.

Code Identity

ICD-10-CM Code
L03.126
Billable Status
Yes — Valid for Submission
Code Describes
Acute lymphangitis of left lower limb
Short Description
Acute lymphangitis of left lower limb
Same as the full description in the CMS dataset.
Parent Code
L03.12
Acute lymphangitis 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 CodeL03.126Acute lymphangitis of left lower limb

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute lymphangitis of ankle
  • Acute lymphangitis of foot
  • Acute lymphangitis of hip
  • Acute lymphangitis of knee
  • Acute lymphangitis of left ankle
  • Acute lymphangitis of left foot
  • Acute lymphangitis of left hip
  • Acute lymphangitis of left knee
  • Acute lymphangitis of left lower limb
  • Acute lymphangitis of left thigh
  • Acute lymphangitis of thigh

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

Bacterial Infections

Bacteria are tiny organisms (living things) that have only one cell. Under a microscope, they look like balls, rods, or spirals. They can be found almost everywhere on Earth. There are lots of bacteria in and on your body. In fact, your body has about 10 times more bacteria cells than human cells.

The full article covers:

  • What are bacteria?
  • 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 L03.126 to ICD-9-CMHistory

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

ICD-9-CM
682.6 Cellulitis of leg
Approximate The match is approximate rather than exact.
ICD-9-CM
682.7 Cellulitis of foot
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 L03.126Overview

Is L03.126 (Acute lymphangitis of other parts of limb) a billable code?

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

What MS-DRG does L03.126 group to?

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

What is the ICD-9 equivalent of L03.126?

Under the General Equivalence Mappings, acute lymphangitis of left lower limb converts to ICD-9-CM 682.6 (cellulitis of leg) and 682.7 (cellulitis of foot). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.