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ICD-10 Guide
ICD-10 CodesL74.510

L74.510

Billable

Primary focal hyperhidrosis, axilla

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/06/2025

Code Description

ICD-10 L74.510 is a billable code used to indicate a diagnosis of primary focal hyperhidrosis, axilla.

Key Diagnostic Point:

Primary focal hyperhidrosis of the axilla is a condition characterized by excessive sweating localized to the underarm area, which can significantly impact the quality of life for affected individuals. The condition typically presents in adolescence or early adulthood and is thought to be due to overactivity of the sympathetic nervous system. Patients may experience episodes of sweating that are disproportionate to the heat or exertion, often leading to social embarrassment and anxiety. The axillary region is anatomically rich in sweat glands, and the hyperhidrosis can lead to skin irritation, maceration, and secondary infections if left untreated. Disease progression can vary; while some patients may experience persistent symptoms, others may find that the severity diminishes over time. Diagnosis is primarily clinical, based on patient history and physical examination, with the use of diagnostic tests such as the starch-iodine test to confirm excessive sweating. Treatment options include topical antiperspirants, iontophoresis, botulinum toxin injections, and in severe cases, surgical intervention. Accurate diagnosis and management are crucial to alleviate symptoms and improve patients' quality of life.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity
  • Treatment complexity
  • Documentation requirements
  • Coding specificity

Audit Risk Factors

  • Common coding errors
  • Documentation gaps
  • Billing challenges

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Primary Care

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Related ICD-10 Codes

Related CPT Codes

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

Primary focal hyperhidrosis, particularly in the axillary region, can significantly affect patients' social interactions and mental health, leading to increased healthcare utilization for management. Understanding the epidemiology of this condition is crucial, as it affects a notable percentage of the population, particularly adolescents and young adults. Quality measures may include patient-reported outcomes related to the effectiveness of treatments and overall satisfaction with care.

ICD-9 vs ICD-10

Primary focal hyperhidrosis, particularly in the axillary region, can significantly affect patients' social interactions and mental health, leading to increased healthcare utilization for management. Understanding the epidemiology of this condition is crucial, as it affects a notable percentage of the population, particularly adolescents and young adults. Quality measures may include patient-reported outcomes related to the effectiveness of treatments and overall satisfaction with care.

Reimbursement & Billing Impact

impact on their quality of life. Reimbursement considerations include the necessity of treatments such as botulinum toxin injections or iontophoresis, which may require prior authorization. Common denials can occur if documentation does not clearly demonstrate the medical necessity of the procedure or if the diagnosis does not align with the treatment provided. Best practices include maintaining thorough records of patient interactions, treatment plans, and responses to therapy.

Resources

Clinical References

  • •
    ICD-10 Official Guidelines for L00-L99
  • •
    Clinical Documentation Requirements

Coding & Billing References

  • •
    ICD-10 Official Guidelines for L00-L99
  • •
    Clinical Documentation Requirements

Frequently Asked Questions

What specific conditions are covered by L74.510?

L74.510 specifically covers primary focal hyperhidrosis localized to the axillary region. It does not include secondary causes of hyperhidrosis, which may be due to underlying medical conditions or medications.

When should L74.510 be used instead of related codes?

L74.510 should be used when the patient presents with excessive sweating specifically in the axillary area without any identifiable secondary cause. If hyperhidrosis is generalized or due to another condition, other codes should be considered.

What documentation supports L74.510?

Documentation should include a detailed patient history, physical examination findings, and any diagnostic tests performed. Evidence of the impact of hyperhidrosis on the patient's daily life and any previous treatments attempted should also be included.