L66
Non-billableCicatricial alopecia [scarring hair loss]
Cicatricial alopecia [scarring hair loss]
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Status
Non-billable / Header
Block
L60-L75
Child Codes
7
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- congenital malformations of integument (Q84.-)
Excludes 2
Conditions not included here, but the patient may have both
- 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.-)
Child Codes (7)
Also Known As / Clinical Terms
Frequently Asked Questions
What is ICD-10 code L66?
ICD-10-CM code L66 represents "Cicatricial alopecia [scarring hair loss]". It is a non-billable header code — use a more specific child code for billing purposes.
Is L66 a billable code?
No, L66 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 7 child codes under L66.
What chapter is L66 in?
L66 is in Chapter 12: Diseases of the Skin and Subcutaneous Tissue (codes L00-L99).
What codes cannot be used with L66?
L66 has Excludes1 notes indicating codes that cannot be used together with it, including: congenital malformations of integument (Q84.-).
What are the subcategories under L66?
L66 has 7 child codes, including: L66.0 (Pseudopelade), L66.1 (Lichen planopilaris), L66.2 (Folliculitis decalvans), L66.3 (Perifolliculitis capitis abscedens), and 3 more.
What are the UMLS CUIs for L66?
L66 is linked to 1 UMLS Concept Unique Identifier: C2936846. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.