All ICD10 Codes

L04

Non-Billable
ChapterL00–L99
Rankcategory
Official Description

Acute lymphadenitis

Use a more specific code (6 billable)
L04.0Acute lymphadenitis of face, head and neckL04.1Acute lymphadenitis of trunkL04.2Acute lymphadenitis of upper limbL04.3Acute lymphadenitis of lower limbL04.8Acute lymphadenitis of other sitesL04.9Acute lymphadenitis, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 12: Diseases of the Skin and Subcutaneous Tissue (L00-L99).

CH12 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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.-)

L00-L08 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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 Code
  • code (B95-B97) to identify infectious agent.

Instructional Notes

Includes
  • abscess (acute) of lymph nodes, except mesenteric
  • acute lymphadenitis, except mesenteric
Excludes1(Not coded here. Use a different 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)

Clinical Hierarchy

BillableHas subcodes
CH12Diseases of the skin and subcutaneous tissue (L00-L99)
L00-L08Infections of the skin and subcutaneous tissue (L00-L08)
L04Acute lymphadenitisNot billable
L04.0Acute lymphadenitis of face, head and neckBillable
L04.1Acute lymphadenitis of trunkBillable
L04.2Acute lymphadenitis of upper limbBillable
L04.3Acute lymphadenitis of lower limbBillable
L04.8Acute lymphadenitis of other sitesBillable
L04.9Acute lymphadenitis, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to L04:

blockL00-L08
Infections of the skin and subcutaneous tissue (L00-L08)
View context instructions
chapterCH12
Diseases of the skin and subcutaneous tissue (L00-L99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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