L03.039 Cellulitis of unspecified toe

ICD-10-CM Diagnosis Code L03.039: Cellulitis of Unspecified Toe

ICD-10-CM code L03.039 identifies cellulitis of an unspecified toe and is an active diagnosis concept for the 2026 version. It falls under the parent category L03.03 for toe cellulitis and is classified as a disease or syndrome. This reference outlines terminology and structural details without providing clinical treatment guidance. 1 3

Plain-language overview

ICD-10-CM code L03.039 carries the preferred name cellulitis of unspecified toe and serves as an active terminology record for the 2026 version, providing a standardized diagnostic label for this condition. 1

What this code represents

The concept L03.039 represents a disease or syndrome and holds an active record status, establishing its role as a valid diagnostic entity within the ICD-10-CM terminology system. 1

Coding details

Within the ICD-10-CM hierarchy, L03.039 is a child of the parent concept L03.03, which denotes cellulitis of the toe, and the target code itself possesses narrower subordinate concepts. 1

The code L03.039 appears within the broader L03 category for cellulitis and acute lymphangitis, specifically grouped under the L03.0 subcategory for conditions affecting the finger and toe. 4

Documentation considerations

The official terminology record for L03.039 explicitly assigns the preferred name cellulitis of unspecified toe, and the code tree lists it alongside related diagnoses like acute lymphangitis of the unspecified toe. 1 4

What the sources add

While one source confirms the 2026 release date for L03.039, another source lists the code alongside related diagnoses like acute lymphangitis of the unspecified toe, illustrating its placement among similar limb conditions. 3 4

A distinct source includes L03.039 in a list of cellulitis diagnoses, while another official terminology record provides the exact semantic type and active status, adding different operational and clinical contexts. 5 1

Coverage and utilization context

One source provides a phecode mapping list for cellulitis and acute lymphangitis of the finger and toe, but the excerpt does not explicitly mention L03.039 or establish payer coverage rules. 2

Sources

1. ICD-10-CM L03.039 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Phecode 681 · ExPRSweb — csg.sph.umich.edu; accessed 2026-07-27.
3. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
4. ICD-10-CM 2024 | L03.0 - Cellulitis and acute lymphangitis of finger and toe — unboundmedicine.com; accessed 2026-07-27.
5. Coding Cellulitis Using ICD-10 Medical Codes — outsourcestrategies.com; accessed 2026-07-27.