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HelpTest Code ALT Alanine Aminotransferase (ALT) (GPT), Serum
Reporting Name
Alanine Aminotransferase (ALT), SUseful For
Diagnosis and monitoring of liver disease associated with hepatic necrosis
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
SerumNecessary Information
Patient's age and sex are required.
Specimen Required
Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Specimen Volume: 0.5 mL
Collection Instructions:
1. Serum gel tubes should be centrifuged within 2 hours of collection.
2. Red-top tubes should be centrifuged and aliquoted within 2 hours of collection.
Specimen Minimum Volume
0.25 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 7 days | |
| Frozen | 7 days |
Reference Values
Males
≥1 year: 7-55 U/L
Reference values have not been established for patients who are <12 months of age.
Females
≥1 year: 7-45 U/L
Reference values have not been established for patients who are <12 months of age.
Day(s) Performed
Monday through Sunday
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
84460
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| ALT | Alanine Aminotransferase (ALT), S | 1743-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| ALT | Alanine Aminotransferase (ALT), S | 1743-4 |
Report Available
Same day/1 to 2 daysReject Due To
| Gross hemolysis | Reject |
Method Name
Photometric Rate, L-Alanine with Pyridoxal-5-Phosphate