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ICD-10 Guide
ICD-10 CodesE71.31

E71.31

Billable

Disorders of fatty-acid oxidation

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

Code Description

ICD-10 E71.31 is a billable code used to indicate a diagnosis of disorders of fatty-acid oxidation.

Key Diagnostic Point:

Disorders of fatty-acid oxidation are a group of inherited metabolic conditions characterized by the body's inability to properly oxidize fatty acids due to enzyme deficiencies. These disorders can lead to the accumulation of fatty acids and their metabolites, resulting in a variety of clinical manifestations. The most common types include Medium-Chain Acyl-CoA Dehydrogenase Deficiency (MCADD), Long-Chain 3-Hydroxyacyl-CoA Dehydrogenase Deficiency (LCHADD), and Very Long-Chain Acyl-CoA Dehydrogenase Deficiency (VLCADD). Symptoms may range from mild to severe and can include hypoglycemia, muscle weakness, cardiomyopathy, and liver dysfunction. Diagnosis typically involves newborn screening, biochemical analysis of acylcarnitines, and genetic testing to identify specific enzyme deficiencies. Management often includes dietary modifications, avoidance of fasting, and supplementation with medium-chain triglycerides (MCTs) to provide an alternative energy source. Early diagnosis and intervention are crucial to prevent serious complications and improve outcomes.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Variety of enzyme deficiencies leading to different clinical presentations
  • Need for biochemical testing and genetic confirmation for accurate diagnosis
  • Potential for overlapping symptoms with other metabolic disorders
  • Variability in treatment protocols based on specific fatty-acid oxidation disorder

Audit Risk Factors

  • Inadequate documentation of enzyme testing results
  • Failure to document dietary management plans
  • Misclassification of the specific fatty-acid oxidation disorder
  • Lack of clear clinical indicators for diagnosis

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Detailed history of symptoms, family history of metabolic disorders, results of newborn screening tests.

Common Clinical Scenarios

Newborn presenting with hypoglycemia, child with recurrent vomiting and lethargy.

Billing Considerations

Ensure documentation reflects the urgency of metabolic crises and interventions taken.

Genetics

Documentation Requirements

Genetic testing results, family pedigree, and detailed clinical evaluations.

Common Clinical Scenarios

Family history of metabolic disorders, patient undergoing genetic counseling.

Billing Considerations

Accurate coding requires clear documentation of genetic findings and their implications.

Coding Guidelines

Inclusion Criteria

Use E71.31 When
  • Follow the official ICD
  • CM coding guidelines for metabolic disorders
  • Ensure that documentation supports the diagnosis, including clinical symptoms, laboratory findings, and any genetic testing results
  • existing

Exclusion Criteria

Do NOT use E71.31 When
  • Exclude codes for other metabolic disorders unless co

Related ICD-10 Codes

Related CPT Codes

81200CPT Code

Genetic testing for fatty-acid oxidation disorders

Clinical Scenario

Used when confirming a diagnosis of a specific fatty-acid oxidation disorder.

Documentation Requirements

Documentation of clinical indications for testing and results.

Specialty Considerations

Genetic counseling may be necessary for families.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of fatty-acid oxidation disorders, improving the ability to capture the nuances of these conditions and their management. This specificity aids in better tracking of patient outcomes and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of fatty-acid oxidation disorders, improving the ability to capture the nuances of these conditions and their management. This specificity aids in better tracking of patient outcomes and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of fatty-acid oxidation disorders, improving the ability to capture the nuances of these conditions and their management. This specificity aids in better tracking of patient outcomes and resource allocation.

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 fatty-acid oxidation disorders?

Common symptoms include hypoglycemia, muscle weakness, cardiomyopathy, and liver dysfunction. Symptoms can vary widely based on the specific enzyme deficiency.