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ICD-10 Guide
ICD-10 CodesL74.519

L74.519

Billable

Primary focal hyperhidrosis, unspecified

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

Code Description

ICD-10 L74.519 is a billable code used to indicate a diagnosis of primary focal hyperhidrosis, unspecified.

Key Diagnostic Point:

Primary focal hyperhidrosis is a condition characterized by excessive sweating in specific areas of the body, most commonly the palms, soles, underarms, and face. This condition is not due to any underlying medical disorder and is often localized, affecting only certain body parts. The excessive sweating can lead to significant discomfort, social anxiety, and impairment in daily activities. The exact pathophysiology is not fully understood, but it is believed to involve overactivity of the sympathetic nervous system. Diagnosis is primarily clinical, based on patient history and physical examination, often supplemented by the use of the Minor's starch-iodine test to confirm hyperhidrosis. Disease progression can vary; while some patients may experience symptoms throughout their lives, others may find that symptoms diminish with age. It is important to differentiate primary focal hyperhidrosis from secondary causes of sweating, which may be associated with systemic conditions such as hyperthyroidism or diabetes. Treatment options include topical antiperspirants, iontophoresis, botulinum toxin injections, and in severe cases, surgical interventions. Accurate diagnosis and coding are essential for appropriate management and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires thorough clinical evaluation and exclusion of secondary causes.
  • Treatment complexity: Multiple treatment modalities available, each with varying efficacy and side effects.
  • Documentation requirements: Detailed patient history and treatment response documentation needed.
  • Coding specificity: Requires precise coding to differentiate from secondary hyperhidrosis.

Audit Risk Factors

  • Common coding errors: Misclassification of primary vs. secondary hyperhidrosis.
  • Documentation gaps: Incomplete patient history or lack of treatment response documentation.
  • Billing challenges: Potential denials if the condition is not well-documented or if treatment options are not clearly outlined.

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 can significantly affect quality of life, leading to social withdrawal and psychological distress. It is estimated to affect 1-3% of the population, making it a relevant public health concern. Understanding this condition can improve healthcare utilization patterns, as effective management can reduce the burden on healthcare systems and enhance patient outcomes. Quality measures may include patient-reported outcomes and treatment satisfaction.

ICD-9 vs ICD-10

Primary focal hyperhidrosis can significantly affect quality of life, leading to social withdrawal and psychological distress. It is estimated to affect 1-3% of the population, making it a relevant public health concern. Understanding this condition can improve healthcare utilization patterns, as effective management can reduce the burden on healthcare systems and enhance patient outcomes. Quality measures may include patient-reported outcomes and treatment satisfaction.

Reimbursement & Billing Impact

impact on daily life, and the treatments attempted. Reimbursement may vary based on the treatment modality used, with some procedures like botulinum toxin injections often requiring prior authorization. Common denials may arise from insufficient documentation or failure to demonstrate medical necessity. Coders should ensure that all relevant information is included in the medical record to support the diagnosis and treatment provided.

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 L74.519?

L74.519 covers primary focal hyperhidrosis that is not specified to a particular body area. It is used when excessive sweating occurs in localized regions without an identifiable secondary cause.

When should L74.519 be used instead of related codes?

L74.519 should be used when the hyperhidrosis is focal and primary, and when the specific area of sweating is not documented. If the sweating is localized to a specific area, such as the axillae or palms, more specific codes should be used.

What documentation supports L74.519?

Documentation should include a detailed patient history, physical examination findings, results from any diagnostic tests performed (like the starch-iodine test), and a record of treatment options tried and their outcomes.