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v1.0.0
ICD-10 Guide
ICD-10 CodesQ85.1

Q85.1

Billable

Tuberous sclerosis

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 Q85.1 is a billable code used to indicate a diagnosis of tuberous sclerosis.

Key Diagnostic Point:

Tuberous sclerosis is a genetic disorder characterized by the growth of benign tumors in multiple organs, including the brain, skin, kidneys, and heart. It is caused by mutations in either the TSC1 or TSC2 genes, leading to the formation of hamartomas. Clinically, patients may present with a variety of symptoms, including seizures, developmental delays, skin lesions such as angiofibromas, and renal complications. The condition is often diagnosed in childhood, and its manifestations can vary widely among individuals. In addition to the tumors, patients may also exhibit other congenital malformations, such as cardiac rhabdomyomas and pulmonary lymphangioleiomyomatosis. Early diagnosis and management are crucial to address the potential complications associated with the disorder, including neurological and renal issues. Genetic counseling is recommended for affected families to understand the inheritance patterns and risks for future pregnancies.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation among patients
  • Need for genetic testing and interpretation of results
  • Potential for co-occurring congenital malformations
  • Documentation of multiple organ involvement

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to report associated congenital anomalies
  • Misinterpretation of genetic testing results
  • Inconsistent coding of related conditions

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Detailed records of developmental milestones, neurological assessments, and any surgical interventions.

Common Clinical Scenarios

Pediatric patients presenting with seizures, skin lesions, or developmental delays requiring multidisciplinary management.

Billing Considerations

Attention to the age of onset and progression of symptoms, as well as family history of similar conditions.

Genetics

Documentation Requirements

Genetic test results, family history, and counseling notes regarding inheritance patterns.

Common Clinical Scenarios

Patients undergoing genetic testing for suspected tuberous sclerosis or related syndromes.

Billing Considerations

Understanding the implications of genetic findings for family planning and management of the condition.

Coding Guidelines

Inclusion Criteria

Use Q85.1 When
  • Follow the official ICD
  • CM guidelines for coding congenital conditions, ensuring accurate documentation of all manifestations and associated conditions
  • Use additional codes to capture specific complications or related congenital anomalies

Exclusion Criteria

Do NOT use Q85.1 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

81229CPT Code

Genetic testing for TSC1 and TSC2 mutations

Clinical Scenario

Used when confirming a diagnosis of tuberous sclerosis through genetic testing.

Documentation Requirements

Documentation of clinical indications for testing and results.

Specialty Considerations

Genetic counseling notes should accompany the testing documentation.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of tuberous sclerosis and its associated conditions, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of tuberous sclerosis and its associated conditions, improving the accuracy of data collection and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    Tuberous Sclerosis Alliance

Coding & Billing References

  • •
    Tuberous Sclerosis Alliance

Frequently Asked Questions

What are the common manifestations of tuberous sclerosis?

Common manifestations include skin lesions such as angiofibromas, seizures, developmental delays, and renal tumors. Each patient may present with a unique combination of these symptoms.