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ICD10BillableValid for clinical use

ICD-10 Code L66.11: Classic lichen planopilaris

L66.11 is a billable ICD-10 diagnosis code used to classify Classic lichen planopilaris in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the skin and subcutaneous tissue (L00-L99).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the skin and subcutaneous tissue (L00-L99).

When is it used?

  • May be used when a clinician documents classic lichen planopilaris in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
12Diseases of the skin and subcutaneous tissue (L00-L99)
block
L60-L75Disorders of skin appendages
category
L66Cicatricial alopecia [scarring hair loss]
category
L66.1Lichen planopilaris
currentL66.1

Official coding notes

Inclusion terms
  • Follicular lichen planus

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Dermatologist

Coverage-related procedures and services

CPT 17340high
CRYOTHERAPY (CO2 SLUSH, LIQUID N2) FOR ACNE
Source: CMS coverage guidance
CPT 17111high
DESTRUCTION (EG, LASER SURGERY, ELECTROSURGERY, CRYOSURGERY, CHEMOSURGERY, SURGICAL CURETTEMENT), OF BENIGN LESIONS OTHER THAN SKIN TAGS OR CUTANEOUS VASCULAR PROLIFERATIVE LESIONS; 15 OR MORE LESIONS
Source: CMS coverage guidance
CPT 17110high
DESTRUCTION (EG, LASER SURGERY, ELECTROSURGERY, CRYOSURGERY, CHEMOSURGERY, SURGICAL CURETTEMENT), OF BENIGN LESIONS OTHER THAN SKIN TAGS OR CUTANEOUS VASCULAR PROLIFERATIVE LESIONS; UP TO 14 LESIONS
Source: CMS coverage guidance
CPT 17004high
DESTRUCTION (EG, LASER SURGERY, ELECTROSURGERY, CRYOSURGERY, CHEMOSURGERY, SURGICAL CURETTEMENT), PREMALIGNANT LESIONS (EG, ACTINIC KERATOSES), 15 OR MORE LESIONS
Source: CMS coverage guidance
CPT 17000high
DESTRUCTION (EG, LASER SURGERY, ELECTROSURGERY, CRYOSURGERY, CHEMOSURGERY, SURGICAL CURETTEMENT), PREMALIGNANT LESIONS (EG, ACTINIC KERATOSES); FIRST LESION
Source: CMS coverage guidance
CPT 17003high
DESTRUCTION (EG, LASER SURGERY, ELECTROSURGERY, CRYOSURGERY, CHEMOSURGERY, SURGICAL CURETTEMENT), PREMALIGNANT LESIONS (EG, ACTINIC KERATOSES); SECOND THROUGH 14 LESIONS, EACH (LIST SEPARATELY IN ADDITION TO CODE FOR FIRST LESION)
Source: CMS coverage guidance

Coding guidelines

Common synonyms

Classic lichen planopilaris

Frequently asked questions

Code details

CodeL66.11
SystemICD10
Display nameClassic lichen planopilaris
ChapterDiseases of the skin and subcutaneous tissue (L00-L99)
BlockDisorders of skin appendages

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
LichenLichenLichen

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.