2026
ICD-10-CM
Diagnosis
Code

L04 Acute lymphadenitis

Non-billable
2016–2026

L04 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Acute lymphadenitis.

Includes

Abscess (acute) of lymph nodes, except mesenteric
Acute lymphadenitis, except mesenteric

Type 1 excludes

Chronic or subacute lymphadenitis, except mesenteric (I88.1)
Enlarged lymph nodes (R59.-)
Human immunodeficiency virus [HIV] disease resulting in generalized lymphadenopathy (B20)
Lymphadenitis NOS (I88.9)
Nonspecific mesenteric lymphadenitis (I88.0)

Codes

Versions

2026
No changes
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code