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L04Non-billableSave

L04 - Acute lymphadenitis

ICD-10-CM Chapter 12: Diseases of the skin and subcutaneous tissue · L00-L08 Infections of the skin and subcutaneous tissue (L00-L08) · Top-level category · FY2027

Coding Guidance

L04 is a non-billable heading. Report one of the 6 more specific codes below.

Includes, Excludes and Coding Notes

IncludesFrom L04

Conditions this code covers.

  • abscess (acute) of lymph nodes, except mesenteric
  • acute lymphadenitis, except mesenteric
Excludes 1 — Not Coded HereFrom L04

Mutually exclusive: these conditions are never 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)
Excludes 2 — Not Included HereFrom L00-L08 Infections of the skin and subcutaneous tissue (L00-L08)

Not part of this code; report both codes when the patient has both conditions.

  • hordeolum (H00.0)
  • infective dermatitis (L30.3)
  • local infections of skin classified in Chapter 1
  • lupus panniculitis (L93.2)
  • panniculitis NOS (M79.3)
  • panniculitis of neck and back (M54.0-)
  • Perlèche NOS (K13.0)
  • Perlèche due to candidiasis (B37.0)
  • Perlèche due to riboflavin deficiency (E53.0)
  • pyogenic granuloma (L98.0)
  • relapsing panniculitis [Weber-Christian] (M35.6)
  • viral warts (B07.-)
  • zoster (B02.-)
Use Additional CodeFrom L00-L08 Infections of the skin and subcutaneous tissue (L00-L08)

Add a secondary code to identify the associated condition or cause when it is documented.

  • code (B95-B97) to identify infectious agent.
Excludes 2 — Not Included HereFrom Chapter L00-L99

Not part of this code; report both codes when the patient has both conditions.

  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • lipomelanotic reticulosis (I89.8)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • viral warts (B07.-)

More Specific Codes (6)

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

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with L04.