L04: Acute lymphadenitis

Codes under L04 (Acute lymphadenitis). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
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	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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