L04.9

Acute lymphadenitis, unspecified

Billable / specific

L04.9 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Not coded here — never report together with this code.

chronic or subacute lymphadenitis, except mesenteric (I88.1) (from L04)
enlarged lymph nodes (R59.-) (from L04)
human immunodeficiency virus [HIV] disease resulting in generalized lymphadenopathy (B20) (from L04)
lymphadenitis NOS (I88.9) (from L04)
nonspecific mesenteric lymphadenitis (I88.0) (from L04)

Not included here — may be reported together when both conditions exist.

certain conditions originating in the perinatal period (P04-P96) (from L04)
certain infectious and parasitic diseases (A00-B99) (from L04)
complications of pregnancy, childbirth and the puerperium (O00-O9A) (from L04)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99) (from L04)
endocrine, nutritional and metabolic diseases (E00-E88) (from L04)
lipomelanotic reticulosis (I89.8) (from L04)
neoplasms (C00-D49) (from L04)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94) (from L04)
systemic connective tissue disorders (M30-M36) (from L04)
viral warts (B07.-) (from L04)
hordeolum (H00.0) (from L04)
infective dermatitis (L30.3) (from L04)
local infections of skin classified in Chapter 1 (from L04)
lupus panniculitis (L93.2) (from L04)
panniculitis NOS (M79.3) (from L04)
panniculitis of neck and back (M54.0-) (from L04)
Perlèche NOS (K13.0) (from L04)
Perlèche due to candidiasis (B37.0) (from L04)
Perlèche due to riboflavin deficiency (E53.0) (from L04)
pyogenic granuloma (L98.0) (from L04)
relapsing panniculitis [Weber-Christian] (M35.6) (from L04)
viral warts (B07.-) (from L04)
zoster (B02.-) (from L04)

Add a code to identify the following, if applicable.