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ICD-10 Guide
DiagnosesAndrogenetic Alopecia

Androgenetic Alopecia

ICD-10 Coding for Androgenetic Alopecia(L64.9, L64.0)

PRIMARY SPECIALTYDermatology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Androgenetic Alopecia?
Essential facts and insights about Androgenetic Alopecia

Key Clinical Considerations:

  • Presence of progressive hair thinning and loss, typically in a patterned distribution.
  • Laboratory findings may include hormonal assays to evaluate androgen levels, though not routinely required for diagnosis.
  • Physical examination findings include miniaturization of hair follicles and a decrease in hair density, particularly in the frontal and vertex regions.
  • Imaging or procedural findings are generally not applicable; however, scalp biopsies may be performed in atypical cases.
  • Severity criteria may include the Norwood-Hamilton scale for men and the Ludwig scale for women to assess the extent of hair loss.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must document the patient's history of hair loss, including onset, duration, and family history.
  • Specific terminology such as 'androgenetic alopecia' or 'pattern hair loss' must be used in documentation.
  • Examples include noting the pattern of hair loss and any associated symptoms like itching or scalp irritation.
  • Medical necessity documentation should justify the need for treatment based on the severity of hair loss and impact on quality of life.
  • Quality measures may include tracking patient-reported outcomes related to hair loss and treatment satisfaction.

Coding Guidelines

Usage Guidelines & Examples

  • Use L64.9 for unspecified androgenetic alopecia when the type is not specified; use L64.0 for male pattern baldness.
  • Do not use these codes for hair loss due to other causes such as alopecia areata or telogen effluvium.
  • Related codes include L65 (other nonscarring hair loss) and L66 (scarring hair loss), which should not be confused with androgenetic alopecia.
  • Common coding errors include misclassifying the type of alopecia; ensure the clinical presentation aligns with the selected code.
  • In complex cases, consider the patient's age and gender, as these factors influence the diagnosis and appropriate code selection.

Code Exclusions

Important Exclusions

  • Excluded conditions include alopecia areata, telogen effluvium, and scarring alopecia.
  • Alternative codes for excluded conditions include L63 for alopecia areata and L66 for scarring hair loss.
  • Conditions are excluded due to differing etiologies and treatment approaches.
  • Common exclusion mistakes include misdiagnosing alopecia areata as androgenetic alopecia; ensure proper clinical evaluation.
  • Related but distinct conditions include traction alopecia and drug-induced hair loss, which require different coding.

Related ICD-10 Codes

Primary Codes
L64.9
Unspecified androgenetic alopecia
L64.0
Male pattern baldness
Ancillary Codes
T38.4X5A
L64.0
to specify the drug causing hair loss.
Differential Codes
L63.9
L65.0

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Dermatology

Specialty Applications

  • This diagnosis applies to individuals experiencing hereditary hair loss, typically in adults.
  • Patient populations include both men and women, with varying prevalence rates based on age and genetic factors.
  • Clinical settings include outpatient dermatology clinics and primary care offices.
  • Specialty-specific applications are relevant in dermatology, endocrinology, and cosmetic surgery.
  • Treatment contexts include medical management with topical minoxidil or oral finasteride, as well as surgical options like hair transplantation.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Patient diagnosed with androgenetic alopecia based on clinical findings of progressive hair loss.'

Template 2

Template: 'Clinical presentation consistent with androgenetic alopecia including thinning of hair in a patterned distribution.'

Template 3

Template: 'Diagnostic criteria for androgenetic alopecia met as evidenced by family history and physical examination findings.'

Template 4

Template: 'Treatment plan initiated for androgenetic alopecia with topical minoxidil and follow-up in 3 months.'

Template 5

Template: 'Follow-up care for androgenetic alopecia including monitoring hair density and patient-reported outcomes.'

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this diagnosis?

Documentation should include patient history, clinical findings, and any relevant lab results.

How does this differ from similar diagnoses?

Androgenetic alopecia is characterized by a specific pattern of hair loss, unlike alopecia areata which presents as patchy loss.

What are common billing considerations?

Ensure that the diagnosis is clearly documented to support medical necessity for treatments.

What procedures are typically associated?

CPT codes for treatments may include 11981 for hair transplant procedures and 96401 for injections.

Are there any quality reporting implications?

Quality measures may include tracking treatment outcomes and patient satisfaction related to hair restoration.