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ICD-10 Guide
ICD-10 CodesE72.11

E72.11

Billable

Homocystinuria

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

Code Description

ICD-10 E72.11 is a billable code used to indicate a diagnosis of homocystinuria.

Key Diagnostic Point:

Homocystinuria is a rare inherited metabolic disorder characterized by the accumulation of homocysteine in the body due to a deficiency in one of the enzymes involved in its metabolism, primarily cystathionine beta-synthase (CBS). This condition is classified as an amino acid disorder and is often associated with a deficiency in vitamin B6, vitamin B12, or folate. Patients with homocystinuria may present with a variety of symptoms, including developmental delays, intellectual disability, skeletal abnormalities, and an increased risk of thromboembolic events. The disorder can lead to serious complications such as cardiovascular disease, osteoporosis, and lens dislocation. Diagnosis is typically confirmed through biochemical testing that measures homocysteine levels in the blood and urine, alongside genetic testing to identify mutations in the CBS gene. Management of homocystinuria often involves dietary modifications to restrict methionine intake, supplementation with vitamins, and in some cases, the use of medications such as betaine to lower homocysteine levels. Early diagnosis and intervention are crucial to prevent long-term complications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of metabolic pathways and enzyme deficiencies.
  • Involves genetic testing and interpretation of results.
  • Management may include dietary restrictions and supplementation.
  • Differentiation from other amino acid disorders is necessary.

Audit Risk Factors

  • Inadequate documentation of biochemical test results.
  • Failure to document genetic testing and its results.
  • Lack of clarity in dietary management plans.
  • Misclassification of the severity of the condition.

Specialty Focus

Medical Specialties

Genetics

Documentation Requirements

Detailed family history and genetic test results must be documented.

Common Clinical Scenarios

Genetic counseling for families with a history of homocystinuria.

Billing Considerations

Ensure accurate coding based on genetic findings and family history.

Nutrition

Documentation Requirements

Dietary plans and nutritional assessments must be clearly outlined.

Common Clinical Scenarios

Management of dietary restrictions for patients with homocystinuria.

Billing Considerations

Document specific dietary modifications and patient compliance.

Coding Guidelines

Inclusion Criteria

Use E72.11 When
  • Follow the official ICD
  • CM coding guidelines for metabolic disorders
  • Ensure that documentation supports the diagnosis, including biochemical and genetic testing results

Exclusion Criteria

Do NOT use E72.11 When
  • Exclude other similar conditions based on clinical findings

Related ICD-10 Codes

Related CPT Codes

81220CPT Code

Cystathionine beta-synthase (CBS) gene analysis

Clinical Scenario

Used to confirm diagnosis of homocystinuria.

Documentation Requirements

Document the reason for testing and results.

Specialty Considerations

Genetic counseling may be necessary for family members.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of metabolic disorders like homocystinuria, improving the accuracy of diagnosis and treatment tracking. This specificity aids in better management and research of the condition.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of metabolic disorders like homocystinuria, improving the accuracy of diagnosis and treatment tracking. This specificity aids in better management and research of the condition.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of metabolic disorders like homocystinuria, improving the accuracy of diagnosis and treatment tracking. This specificity aids in better management and research of the condition.

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 homocystinuria?

Common symptoms include developmental delays, intellectual disability, skeletal abnormalities, and an increased risk of thromboembolic events.

How is homocystinuria diagnosed?

Diagnosis is confirmed through biochemical testing that measures homocysteine levels in the blood and urine, alongside genetic testing.

What is the management for homocystinuria?

Management typically involves dietary modifications to restrict methionine intake, vitamin supplementation, and possibly medications to lower homocysteine levels.