DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

L04 Acute lymphadenitis

  • Header · not billable

L04 is not billable. The category heads 6 billable codes in FY2027: the 6 codes directly below it.

Index → code

  • Adenitisgangrenous → L04.9
  • Lymphadenitisacute → L04.9
  • Adenitisacute, unspecified site → L04.9

Where it sits

  1. Chapter 12 Diseases of the skin and subcutaneous tissue (L00-L99)
  2. L00-L08 Infections of the skin and subcutaneous tissue (L00-L08)
  3. L04 Acute lymphadenitis
Billable codes
6
Subdivisions
6
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
24

Codes in L04

  1. L04.0
    Acute lymphadenitis of face, head and neck
    Billable
  2. L04.1
    Acute lymphadenitis of trunk
    Billable
  3. L04.2
    Acute lymphadenitis of upper limb
    Billable
    Inclusion terms 2

    Inclusion terms

    • Acute lymphadenitis of axilla
    • Acute lymphadenitis of shoulder
  4. L04.3
    Acute lymphadenitis of lower limb
    Billable
    Inclusion terms 1, Excludes2 1

    Inclusion terms

    • Acute lymphadenitis of hip

    Excludes2

    • acute lymphadenitis of groin (L04.1) L04.1
  5. L04.8
    Acute lymphadenitis of other sites
    Billable
  6. L04.9
    Acute lymphadenitis, unspecified
    Billable

Sources of each column.

Instructions

At L04

Includes

  • abscess (acute) of lymph nodes, except mesenteric
  • acute lymphadenitis, except mesenteric

Excludes1

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

Notes that also apply

Block L00-L08 instructions (Excludes2 13, Use additional code 1): printed on the block page.

Chapter 12 instructions (Excludes2 10): printed on the chapter 12 page.

Index entries

  • Infection, infected, infective (opportunistic)cervical gland (lymph) → L04.0
  • Infection, infected, infective (opportunistic)inguinal (lymph) glands → L04.1
  • Infection, infected, infective (opportunistic)axillary gland (lymph) → L04.2
  • Adenitisacute, unspecified site → L04.9
  • Adenitisgangrenous → L04.9
  • Lymphadenitisacute → L04.9
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)cervical (meaning neck)lymph gland or node → L04.0
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)neck (region)lymph gland or node → L04.0
  • Adenitiscervicalacute → L04.0
  • Lymphadenitisacuteface → L04.0
  • Lymphadenitisacutehead → L04.0
  • Lymphadenitisacuteneck → L04.0
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)inguinal (region)lymph gland or node → L04.1
  • Adenitisgroinacute → L04.1
  • Adenitisinguinalacute → L04.1
  • Lymphadenitisacutetrunk → L04.1
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)axilla (region)lymph gland or node → L04.2
  • Adenitisaxillaryacute → L04.2
  • Lymphadenitisacuteaxilla → L04.2
  • Lymphadenitisacuteshoulder → L04.2
  • Lymphadenitisacutehip → L04.3
  • Lymphadenitisacutespecified site NEC → L04.8
  • Lymphadenitisacutelimbupper → L04.2
  • Lymphadenitisacutelimblower → L04.3

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy