DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

L23 Allergic contact dermatitis

  • Header · not billable

L23 is not billable. The category heads 11 billable codes in FY2027, grouped under 10 subdivisions.

Index → code

  • Poison ivy, oak, sumac or other plant dermatitis (allergic) (contact) → L23.7
  • Itch, itchingbaker's → L23.6
  • Dermatitis (eczematous)sensitization NOS → L23.9

Where it sits

  1. Chapter 12 Diseases of the skin and subcutaneous tissue (L00-L99)
  2. L20-L30 Dermatitis and eczema (L20-L30)
  3. L23 Allergic contact dermatitis
Billable codes
11
Subdivisions
10
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
40

Codes in L23

  1. L23.0
    Allergic contact dermatitis due to metals
    Billable
    Inclusion terms 2

    Inclusion terms

    • Allergic contact dermatitis due to chromium
    • Allergic contact dermatitis due to nickel
  2. L23.1
    Allergic contact dermatitis due to adhesives
    Billable
  3. L23.2
    Allergic contact dermatitis due to cosmetics
    Billable
  4. L23.3
    Allergic contact dermatitis due to drugs in contact with skin
    Billable
    Excludes2 1, Use additional code 1

    Excludes2

    • dermatitis due to ingested drugs and medicaments (L27.0-L27.1) L27.0 L27.1

    Use additional code

    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) T36 T50
  5. L23.4
    Allergic contact dermatitis due to dyes
    Billable
  6. L23.5
    Allergic contact dermatitis due to other chemical products
    Billable
    Inclusion terms 4

    Inclusion terms

    • Allergic contact dermatitis due to cement
    • Allergic contact dermatitis due to insecticide
    • Allergic contact dermatitis due to plastic
    • Allergic contact dermatitis due to rubber
  7. L23.6
    Allergic contact dermatitis due to food in contact with the skin
    Billable
    Excludes2 1

    Excludes2

    • dermatitis due to ingested food (L27.2) L27.2
  8. L23.7
    Allergic contact dermatitis due to plants, except food
    Billable
    Excludes2 1

    Excludes2

    • allergy NOS due to pollen (J30.1) J30.1
  9. L23.8
    Allergic contact dermatitis due to other agents
    Header
  10. L23.81
    Allergic contact dermatitis due to animal (cat) (dog) dander
    Billable
    Inclusion terms 1

    Inclusion terms

    • Allergic contact dermatitis due to animal (cat) (dog) hair
  11. L23.89
    Allergic contact dermatitis due to other agents
    Billable
  12. L23.9
    Allergic contact dermatitis, unspecified cause
    Billable
    Inclusion terms 1

    Inclusion terms

    • Allergic contact eczema NOS

Sources of each column.

Instructions

At L23

Excludes1

  • allergy NOS (T78.40) T78.40
  • contact dermatitis NOS (L25.9) L25.9
  • dermatitis NOS (L30.9) L30.9

Excludes2

  • dermatitis due to substances taken internally (L27.-) L27
  • dermatitis of eyelid (H01.1-) H01.1
  • diaper dermatitis (L22) L22
  • eczema of external ear (H60.5-) H60.5
  • irritant contact dermatitis (L24.-) L24
  • perioral dermatitis (L71.0) L71.0
  • radiation-related disorders of the skin and subcutaneous tissue (L55-L59) L55 L59

Notes that also apply

Block L20-L30 instructions (Notes 1, Excludes2 8): printed on the block page.

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

Index entries

  • Poison ivy, oak, sumac or other plant dermatitis (allergic) (contact) → L23.7
  • Itch, itchingbaker's → L23.6
  • Dermatitis (eczematous)sensitization NOS → L23.9
  • Dermatitis (eczematous)due toadhesive(s) (allergic) (contact) (plaster) → L23.1
  • Dermatitis (eczematous)due toplasters (adhesive) (any) (allergic) (contact) → L23.1
  • Allergy, allergic (reaction) (to)food (any) (ingested) NECin contact with skin → L23.6
  • Dermatitis (eczematous)due tolacquer tree (allergic) (contact) → L23.7
  • Dermatitis (eczematous)due toprimrose (allergic) (contact) → L23.7
  • Dermatitis (eczematous)due toprimula (allergic) (contact) → L23.7
  • Dermatitis (eczematous)due toragweed (allergic) (contact) → L23.7
  • Dermatitis (eczematous)due toRhus (allergic) (contact) (diversiloba) (radicans) (toxicodendron) (venenata) (verniciflua) → L23.7
  • Dermatitis (eczematous)due toSenecio jacobaea (allergic) (contact) → L23.7
  • Dermatitis (eczematous)due todander (cat) (dog) → L23.81
  • Dermatitis (eczematous)due tofurs (allergic) (contact) → L23.81
  • Dermatitis (eczematous)due tohair (cat) (dog) → L23.81
  • Dermatitis (eczematous)contact (occupational)allergic → L23.9
  • Dermatitis (eczematous)due tocosmetics (contact)allergic → L23.2
  • Dermatitis (eczematous)due todyes (contact)allergic → L23.4
  • Dermatitis (eczematous)due toplants NEC (contact)allergic → L23.7
  • Dermatitis (eczematous)contact (occupational)due todander (cat) (dog) → L23.81
  • Dermatitis (eczematous)contact (occupational)due tohair (cat) (dog) → L23.81
  • Dermatitis (eczematous)due tospecified agent NEC (contact)allergic → L23.89
  • Dermatitis (eczematous)contact (occupational)allergicdue tochromium → L23.0
  • Dermatitis (eczematous)contact (occupational)allergicdue tometals → L23.0
  • Dermatitis (eczematous)contact (occupational)allergicdue tonickel → L23.0
  • Dermatitis (eczematous)contact (occupational)allergicdue toadhesives → L23.1
  • Dermatitis (eczematous)contact (occupational)allergicdue tocosmetics → L23.2
  • Dermatitis (eczematous)contact (occupational)allergicdue todrugs in contact with skin → L23.3
  • Dermatitis (eczematous)due todrugs and medicaments (generalized) (internal use)in contact with skinallergic → L23.3
  • Dermatitis (eczematous)contact (occupational)allergicdue todyes → L23.4
  • Dermatitis (eczematous)contact (occupational)allergicdue tocement → L23.5
  • Dermatitis (eczematous)contact (occupational)allergicdue tochemical products NEC → L23.5
  • Dermatitis (eczematous)contact (occupational)allergicdue toinsecticide → L23.5
  • Dermatitis (eczematous)contact (occupational)allergicdue toplastic → L23.5
  • Dermatitis (eczematous)contact (occupational)allergicdue torubber → L23.5
  • Dermatitis (eczematous)contact (occupational)allergicdue tofood in contact with skin → L23.6
  • Dermatitis (eczematous)contact (occupational)allergicdue toplants, non-food → L23.7
  • Dermatitis (eczematous)contact (occupational)allergicdue todander (cat) (dog) → L23.81
  • Dermatitis (eczematous)contact (occupational)allergicdue tohair (cat) (dog) → L23.81
  • Dermatitis (eczematous)contact (occupational)allergicdue tospecified agent NEC → L23.89

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

Hierarchy