L04.0 ICD-10-CA code: Acute lymphadenitis of face, head and neck
L04.0 is the ICD-10-CA code for “Acute lymphadenitis of face, head and neck” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
L04.0Acute lymphadenitis of face, head and neck
Short description: Acute lymphadenitis face head & neck
ICD-10-CA · Canada · Also written L040
Index terms
Entries in CIHI’s alphabetical index that lead to L04.0. Searching the index by the condition the note names is how coders reach this code.
- Adenitis, cervical, acute
- Lymphadenitis, acute, face
- Lymphadenitis, acute, head
- Lymphadenitis, acute, neck
- Infection, infected (opportunistic), cervical gland (lymph)
- Abscess (embolic) (infective) (metastatic) (multiple) (pyogenic) (septic), neck (region), lymph gland or node
- Abscess (embolic) (infective) (metastatic) (multiple) (pyogenic) (septic), cervical (meaning neck), lymph gland or node
Notes for L04.0
As CIHI prints them, with any note L04.0 takes from the headings above it.
Includes
- abscess (acute), lymphadenitis, acute — any lymph node, except mesentericFrom L04 Acute lymphadenitis
Use additional code
Add a code for this detail when the note documents it.
- Use additional code (B95-B97) to identify infectious agent.From L00-L08 Infections of the skin and subcutaneous tissue
Excludes
Conditions classified elsewhere.
- Enlarged lymph nodes (R59.-)human immunodeficiency virus [HIV] disease resulting in generalized lymphadenopathy (B24)lymphadenitis:• chronic or subacute, except mesenteric (I88.1)• mesenteric, nonspecific (I88.0)• NOS (I88.9)From L04 Acute lymphadenitis
- Hordeolum (H00.0)infective dermatitis (L30.3)local infections of skin classified in Chapter I, such as:• erysipelas (A46)• erysipeloid (A26.-)• herpesviral [herpes simplex] infection (B00.-)• anogenital (A60.-)• molluscum contagiosum (B08.1)• mycoses (B35-B49)• pediculosis, acariasis and other infestations (B85-B89)• viral warts (B07)panniculitis (of):• NOS (M79.3)• lupus (L93.2)• neck and back (M54.0)• relapsing [Weber-Christian] (M35.6)perlèche (due to):• NOS (K13.0)• candidiasis (B37.-)• riboflavin deficiency (E53.0)pyogenic granuloma (L98.0)zoster (B02.-)From L00-L08 Infections of the skin and subcutaneous tissue
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)lipomelanotic reticulosis (I89.8)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)systemic connective tissue disorders (M30-M36)From Chapter 12: Diseases of the skin and subcutaneous tissue (L00-L99)
Where L04.0 sits
- 1ChapterChapter 12: Diseases of the skin and subcutaneous tissue (L00-L99)
- 2Block L00-L08Infections of the skin and subcutaneous tissue
- 3Category L04Acute lymphadenitis
- 4Valid code L04.0Acute lymphadenitis of face, head and neck
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code L04.0 mean?
L04.0 is the ICD-10-CA code for “Acute lymphadenitis of face, head and neck” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is L04.0 in ICD-10-CA?
L04.0 sits under L04 Acute lymphadenitis, within L00-L08 Infections of the skin and subcutaneous tissue, within Chapter 12: Diseases of the skin and subcutaneous tissue (L00-L99).
What coding notes apply to L04.0?
ICD-10-CA lists Includes, Excludes, Use additional code notes for L04.0, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.