E72.00

HCC Category Mapping

What This Code Means

A group of inherited disorders affecting the body's ability to transport amino acids (building blocks of proteins) across cell membranes, with unspecified type.

Coding Tips

• •This is an unspecified code; use only when the specific amino-acid transport disorder cannot be determined from documentation
• •If a specific disorder is identified (cystinuria, Hartnup's disease, etc.), use the more specific code instead

Clinical Significance

Unspecified amino acid transport disorder indicates a condition where amino acids cannot be properly moved across cell membranes in the kidneys, intestines, or other tissues, but the specific type has not been determined. These disorders can result in amino acid wasting, nutritional deficiencies, and organ-specific complications depending on which amino acids are affected. Definitive diagnosis requires specialized urine and plasma amino acid testing.

Documentation Requirements

• ✓Document clinical findings suggesting an amino acid transport defect, urine and plasma amino acid analyses, renal function assessment, and reason the specific type has not been determined.
• ✓Record any complications such as nephrolithiasis or nutritional deficiencies.

Commonly Confused Codes