DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

L66 Cicatricial alopecia [scarring hair loss]

  • Header · not billable

L66 is not billable. The category heads 11 billable codes in FY2027, grouped under 7 subdivisions.

Index → code

  • Pseudopelade → L66.0
  • FFA (frontal fibrosing alopecia) → L66.12
  • CCCA (central centrifugal cicatricial alopecia) → L66.81

Where it sits

  1. Chapter 12 Diseases of the skin and subcutaneous tissue (L00-L99)
  2. L60-L75 Disorders of skin appendages (L60-L75)
  3. L66 Cicatricial alopecia [scarring hair loss]
Billable codes
11
Subdivisions
7
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
21

Codes in L66

  1. L66.0
    Pseudopelade
    Billable
  2. L66.1
    Lichen planopilaris
    Header
  3. L66.10
    Lichen planopilaris, unspecified
    Billable
  4. L66.11
    Classic lichen planopilaris
    Billable
    Inclusion terms 1

    Inclusion terms

    • Follicular lichen planus
  5. L66.12
    Frontal fibrosing alopecia
    Billable
    Inclusion terms 1

    Inclusion terms

    • FFA
  6. L66.19
    Other lichen planopilaris
    Billable
    Inclusion terms 1

    Inclusion terms

    • Lassueur Graham-Little Piccardi syndrome
  7. L66.2
    Folliculitis decalvans
    Billable
  8. L66.3
    Perifolliculitis capitis abscedens
    Billable
  9. L66.4
    Folliculitis ulerythematosa reticulata
    Billable
  10. L66.8
    Other cicatricial alopecia
    Header
  11. L66.81
    Central centrifugal cicatricial alopecia
    Billable
    Inclusion terms 1

    Inclusion terms

    • CCCA
  12. L66.89
    Other cicatricial alopecia
    Billable
  13. L66.9
    Cicatricial alopecia, unspecified
    Billable

Sources of each column.

Instructions

Notes that also apply

Block L60-L75 instructions (Excludes1 1): printed on the block page.

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

Index entries

  • Pseudopelade → L66.0
  • FFA (frontal fibrosing alopecia) → L66.12
  • CCCA (central centrifugal cicatricial alopecia) → L66.81
  • Lichenplanopilaris → L66.10
  • Alopecia (hereditaria) (seborrheica)frontal fibrosing → L66.12
  • SyndromeLassueur Graham-Little Piccardi → L66.19
  • Acnedecalvans → L66.2
  • Folliculitis (superficial)decalvans → L66.2
  • Folliculitis (superficial)abscedens et suffodiens → L66.3
  • Perifolliculitisabscedens, caput, scalp → L66.3
  • Perifolliculitiscapitis, abscedens (et suffodiens) → L66.3
  • Atrophoderma, atrophodermia (of)reticulatum symmetricum faciei → L66.4
  • Atrophoderma, atrophodermia (of)vermiculata (cheeks) → L66.4
  • Folliculitis (superficial)ulerythematosa reticulata → L66.4
  • Alopecia (hereditaria) (seborrheica)cicatricial → L66.9
  • Lichenplanopilarisclassic → L66.11
  • Lichenplanopilarisfollicular → L66.11
  • Lichenplanus (chronicus)follicular → L66.11
  • Lichenplanopilarisspecified NEC → L66.19
  • Alopecia (hereditaria) (seborrheica)cicatricialcentral centrifugal → L66.81
  • Alopecia (hereditaria) (seborrheica)cicatricialspecified NEC → L66.89

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

Hierarchy