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ICD-10 Guide
ICD-10 CodesE72.8

E72.8

Billable

Other specified disorders of amino-acid metabolism

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

Code Description

ICD-10 E72.8 is a billable code used to indicate a diagnosis of other specified disorders of amino-acid metabolism.

Key Diagnostic Point:

E72.8 encompasses a variety of metabolic disorders that affect the metabolism of amino acids, which are the building blocks of proteins. These disorders can arise from genetic enzyme deficiencies that disrupt normal metabolic pathways, leading to the accumulation of toxic metabolites or the deficiency of essential amino acids. Conditions included under this code may involve disorders such as cystathioninuria, hyperprolinemia, and other rare amino acid metabolic disorders that do not fall under more specific classifications. Symptoms can vary widely, ranging from mild to severe, and may include neurological deficits, developmental delays, and metabolic crises. Diagnosis typically involves biochemical testing to measure amino acid levels in blood and urine, alongside genetic testing to identify specific enzyme deficiencies. Management often requires dietary modifications, supplementation, and in some cases, enzyme replacement therapy. Given the complexity of these disorders, a multidisciplinary approach is often necessary for effective treatment and management.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Variety of underlying genetic conditions
  • Need for biochemical testing for accurate diagnosis
  • Potential for overlapping symptoms with other metabolic disorders
  • Variability in clinical presentation and severity

Audit Risk Factors

  • Inadequate documentation of biochemical test results
  • Failure to specify the exact amino acid disorder
  • Lack of clarity in the clinical rationale for the diagnosis
  • Misclassification of the disorder under more specific codes

Specialty Focus

Medical Specialties

Genetics

Documentation Requirements

Detailed family history and genetic testing results must be documented.

Common Clinical Scenarios

Patients presenting with unexplained developmental delays or metabolic crises.

Billing Considerations

Genetic counseling may be necessary for families, and documentation should reflect the multidisciplinary approach.

Pediatrics

Documentation Requirements

Growth charts, developmental assessments, and dietary history are crucial.

Common Clinical Scenarios

Infants or children with failure to thrive or unusual metabolic symptoms.

Billing Considerations

Close monitoring of dietary intake and metabolic status is essential for pediatric patients.

Coding Guidelines

Inclusion Criteria

Use E72.8 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation
  • Include any relevant laboratory results and genetic testing outcomes

Exclusion Criteria

Do NOT use E72.8 When
  • Exclude conditions that are more specifically classified under other codes

Related ICD-10 Codes

Related CPT Codes

83088CPT Code

Amino acid analysis

Clinical Scenario

Used to confirm the diagnosis of an amino acid metabolism disorder.

Documentation Requirements

Document the reason for the test and the specific amino acids being analyzed.

Specialty Considerations

Geneticists and metabolic specialists should ensure comprehensive documentation of test results.

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, including E72.8, which captures a broader range of amino acid metabolism disorders that were previously grouped under less specific codes in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of metabolic disorders, including E72.8, which captures a broader range of amino acid metabolism disorders that were previously grouped under less specific codes in ICD-9.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of metabolic disorders, including E72.8, which captures a broader range of amino acid metabolism disorders that were previously grouped under less specific codes in ICD-9.

Resources

Clinical References

  • •
    Amino Acid Metabolism Disorders Overview

Coding & Billing References

  • •
    Amino Acid Metabolism Disorders Overview

Frequently Asked Questions

What types of conditions are included under E72.8?

E72.8 includes various unspecified disorders of amino acid metabolism, such as cystathioninuria and hyperprolinemia, which do not have their own specific codes.