L04
Header — not billableAcute lymphadenitis
The ICD-10 code for acute lymphadenitis is L04.
L04 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 6 more specific codes below.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
Includes
Terms listed here further define or give examples of the conditions grouped under this code — they describe what the code covers, not a separate diagnosis.
- abscess (acute) of lymph nodes, except mesenteric
- acute lymphadenitis, except mesenteric
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- L00Staphylococcal scalded skin syndrome
- L01Impetigonon-billable header
- L02Cutaneous abscess, furuncle and carbunclenon-billable header
- L03Cellulitis and acute lymphangitisnon-billable header
- L05Pilonidal cyst and sinusnon-billable header
- L08Other local infections of skin and subcutaneous tissuenon-billable header
- L04Acute lymphadenitisnon-billable header