Aspartate Aminotransferase (AST/SGOT), Plasma or Serum

Test Code

AST - NOCO

CPT Codes
84450

Includes

Note: This test is included in CMPGFR - Comprehensive Metabolic Panel and HFP - Hepatic Function Panel

Preferred Specimen

1 mL Plasma Green top (Lithium Heparin)

Minimum Volume

0.5 mL
Note: For neonate requirements see Neonate Minimum Blood Volumes

Other Acceptable Specimens

1 mL serum from SST or Red Top

Specimen Stability

Specimen Type	Temperature	Time
Plasma Li Hep	Ambient	4 days
Plasma Li Hep	Refrigerated	5 days
Plasma Li Hep	Frozen	3 months
Serum SST	Ambient	4 days
Serum SST	Refrigerated	5 days
Serum SST	Frozen	3 months
Red Top – Separated*	Ambient	4 days
Red Top – Separated*	Refrigerated	5 days
Red Top – Separated*	Frozen	3 months

*Centrifuge and aliquot into a plastic vial.

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis
For NCMC only: Gross lipemia if plasma - Serum specimen needed if Grossly Lipemic

Methodology
Ultraviolet Without P5P

Setup Schedule

Monday through Sunday; Continuously

Report Available

Same day

Reference Range

Summit View
15 - 37 U/L
Critical value (automatic call-back) Labor & Delivery only: >100 U/

McKee, BFCMC & NCMC
Males
            0-1 year: 21 – 73 IU/L
1-6 years: 20 – 51 IU/L
6-150 years: 12 – 47 IU/L
Females
            0-1 year: 21 – 73 IU/L
1-3 years: 22 – 55 IU/L
            3-6 years: 20 – 45 IU/L
            6-9 years: 16 – 43 IU/L
            9-150 years: 11 – 40 IU/L

Courtesy call for OB > 100 IU/L

Performing Laboratory
Banner Fort Collins Medical Center Laboratory
Mckee Medical Center Laboratory
North Colorado Medical Center Laboratory
Summit View Laboratory

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.