L04.9Billable

Acute lymphadenitis, unspecified

Chapter
12. Diseases of the skin and subcutaneous tissue
Category
L04
Effective date
October 1, 2026

Related codes in category L04

L04Acute lymphadenitisL04.0Acute lymphadenitis of face, head and neckYesL04.1Acute lymphadenitis of trunkYesL04.2Acute lymphadenitis of upper limbYesL04.3Acute lymphadenitis of lower limbYesL04.8Acute lymphadenitis of other sitesYes

Frequently asked questions

What is ICD-10 code L04.9?

L04.9 is an ICD-10-CM diagnosis code for Acute lymphadenitis, unspecified.

Is L04.9 a billable code?

Yes. L04.9 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is L04.9 in?

L04.9 falls under Chapter 12: Diseases of the skin and subcutaneous tissue.

When did L04.9 become effective?

L04.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to L04.9?

L04.9 belongs to category L04, which includes 6 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.