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v1.0.0
ICD-10 Guide
ICD-10 CodesE72.02

E72.02

Billable

Hartnup's disease

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 E72.02 is a billable code used to indicate a diagnosis of hartnup's disease.

Key Diagnostic Point:

Hartnup's disease is a rare genetic metabolic disorder characterized by the impaired absorption of certain amino acids, particularly neutral amino acids such as tryptophan, due to a defect in the SLC6A19 gene. This condition leads to a deficiency in the transport of these amino acids in the intestines and kidneys, resulting in their excessive excretion in urine. Clinically, patients may present with symptoms such as skin rashes, neurological manifestations, and psychiatric symptoms, particularly during periods of stress or illness. The disease is often associated with a deficiency of niacin (vitamin B3), which can lead to pellagra-like symptoms. Diagnosis is typically confirmed through urine amino acid analysis, which shows elevated levels of neutral amino acids. Management includes dietary modifications to ensure adequate intake of essential amino acids and, in some cases, supplementation with niacin. Early recognition and intervention are crucial to prevent complications and improve quality of life.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Genetic testing may be required for definitive diagnosis.
  • Symptoms can overlap with other metabolic disorders.
  • Requires understanding of amino acid metabolism.
  • Documentation of dietary intake and response to treatment is essential.

Audit Risk Factors

  • Inadequate documentation of genetic testing results.
  • Failure to document dietary interventions.
  • Misclassification of symptoms as unrelated conditions.
  • Lack of follow-up documentation on patient progress.

Specialty Focus

Medical Specialties

Genetics

Documentation Requirements

Genetic test results, family history, and clinical findings.

Common Clinical Scenarios

Patients presenting with unexplained neurological symptoms or skin rashes.

Billing Considerations

Ensure that genetic counseling is documented.

Nutrition

Documentation Requirements

Dietary assessments and nutritional interventions.

Common Clinical Scenarios

Management of dietary intake in patients with Hartnup's disease.

Billing Considerations

Document any changes in dietary plans and patient adherence.

Coding Guidelines

Inclusion Criteria

Use E72.02 When
  • Follow ICD
  • CM guidelines for coding genetic disorders
  • Ensure that all relevant clinical findings and diagnostic tests are documented
  • Include any related conditions that may affect treatment

Exclusion Criteria

Do NOT use E72.02 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

81240CPT Code

Genetic testing for SLC6A19 mutations

Clinical Scenario

Used when confirming diagnosis of Hartnup's disease.

Documentation Requirements

Document the reason for testing and results.

Specialty Considerations

Genetic counseling should be included in the documentation.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of genetic metabolic disorders, improving the accuracy of diagnoses and treatment tracking for conditions like Hartnup's disease.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of genetic metabolic disorders, improving the accuracy of diagnoses and treatment tracking for conditions like Hartnup's disease.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of genetic metabolic disorders, improving the accuracy of diagnoses and treatment tracking for conditions like Hartnup's disease.

Resources

Clinical References

  • •
    National Organization for Rare Disorders (NORD)

Coding & Billing References

  • •
    National Organization for Rare Disorders (NORD)

Frequently Asked Questions

What are the common symptoms of Hartnup's disease?

Common symptoms include skin rashes, neurological issues, and psychiatric symptoms, particularly during stress or illness.