ICD-10-CM L04: Acute lymphadenitis

ICD-10-CM Diagnosis Code (2025)

Official Description for L04

Acute lymphadenitis

Coding Notes & Guidelines for L04

Includes Notes
  • abscess (acute) of lymph nodes, except mesenteric
  • acute lymphadenitis, except mesenteric
Excludes1: Not Coded Here
  • 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)
Excludes2: Not Included Here

acute lymphadenitis of groin (L04.1)

Inclusion Terms
  • Acute lymphadenitis of axilla
  • Acute lymphadenitis of shoulder
Inclusion Terms

Acute lymphadenitis of hip

Child Codes (More Specific Codes for L04):

L04.0 - Acute lymphadenitis of face, head and neck L04.1 - Acute lymphadenitis of trunk L04.2 - Acute lymphadenitis of upper limb L04.3 - Acute lymphadenitis of lower limb L04.8 - Acute lymphadenitis of other sites L04.9 - Acute lymphadenitis, unspecified

About ICD-10-CM Code L04 (Acute lymphadenitis)

ICD-10-CM code L04 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM L04 became effective on October 1, 2024.

This page provides detailed information about L04 - Acute lymphadenitis. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Acute lymphadenitis.