L04 ICD-10-CM Code: Acute lymphadenitis
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
L04Acute lymphadenitis
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where L04 sits
- 1
Chapter 12
Diseases of the skin and subcutaneous tissue (L00-L99)
- 2
Section
Infections of the skin and subcutaneous tissue (L00-L08)
- 3
Category L04
Acute lymphadenitis
- 4
Code L04
Acute lymphadenitis
More specific choices
Codes under L04
L04 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for L04.
Code first
No “code first” instruction is listed for L04.
Use additional code
No “use additional code” instruction is listed for L04.
Excludes1
Conditions that should not be reported together with this code.
- 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
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for L04.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code L04 mean?
L04 is the FY 2027 U.S. ICD-10-CM code for “Acute lymphadenitis.”
Is L04 a billable or specific ICD-10-CM code?
No. L04 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is L04 located in ICD-10-CM?
L04 is listed in Chapter 12, Diseases of the skin and subcutaneous tissue (L00-L99), within Infections of the skin and subcutaneous tissue (L00-L08) (L00–L08), under category L04, Acute lymphadenitis.
What coding notes are listed for L04?
No inclusion terms are listed for L04 in this reference record. No code-first instruction is listed. Excludes1 notes: 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). No Excludes2 note is listed.
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