ICD-10 Diagnosis Code L66.9

Cicatricial alopecia, unspecified

Diagnosis Code L66.9

ICD-10: L66.9
Short Description: Cicatricial alopecia, unspecified
Long Description: Cicatricial alopecia, unspecified
This is the 2017 version of the ICD-10-CM diagnosis code L66.9

Code Classification
  • Diseases of the skin and subcutaneous tissue
    • Disorders of skin appendages (L60-L75)
      • Cicatricial alopecia [scarring hair loss] (L66)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code L66.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Cicatricial alopecia caused by ionizing radiation
  • Radiation alopecia
  • Scarring alopecia

Information for Patients

Hair Loss

Also called: Alopecia

You lose up to 100 hairs from your scalp every day. That's normal, and in most people, those hairs grow back. But many men -- and some women -- lose hair as they grow older. You can also lose your hair if you have certain diseases, such as thyroid problems, diabetes, or lupus. If you take certain medicines or have chemotherapy for cancer, you may also lose your hair. Other causes are stress, a low protein diet, a family history, or poor nutrition.

Treatment for hair loss depends on the cause. In some cases, treating the underlying cause will correct the problem. Other treatments include medicines and hair restoration.

  • Alopecia areata
  • Coping with cancer -- hair loss
  • Female pattern baldness
  • Hair loss
  • Hair transplant
  • Male pattern baldness
  • Trichotillomania

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