ALT (Alanine Aminotransferase)

CPT: 84460
Liver

What This Test Measures

Most liver-specific enzyme; elevated in hepatitis, NAFLD, and drug-induced liver injury.

Preparation

No fasting required
No fasting required. Avoid strenuous exercise 24–48 hours before — ALT and AST can be elevated by muscle breakdown after exercise.

General guidelines only. Requirements vary by lab and individual. Confirm with your provider before adjusting any medications.

Turnaround Time

Varies by lab

Clinical Notes

More liver-specific than AST; primary liver damage marker

ICD-10 Codes

Common diagnosis codes associated with this test. Codes are assigned by your provider.

B18.2Chronic viral hepatitis C
K70.10Alcoholic hepatitis without ascites
K76.0Fatty (change of) liver, not elsewhere classified

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Lab Codes

Proprietary codes used by each lab for this test.

ARUP Laboratories
0020008(order_code)
BioReference Laboratories
0147-9(order_code)
LabCorp
001545(order_code)
Quest Diagnostics
823(order_code)

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For informational purposes only

This page is for educational and research purposes only and does not constitute medical advice, diagnosis, or treatment recommendations. ICD-10 and CPT codes are assigned by your healthcare provider. Always consult a qualified healthcare provider before ordering any lab test or making decisions about your health.