ALBUMIN / GLOBULIN RATIO

Test Code

A/GR

CPT Codes
82040; 84155

Includes

Total protein, Albumin, Globulin, and A/G Ratio

Preferred Specimen

1 Gold tube (gel separator)

Minimum Volume

1 mL serum or plasma

Other Acceptable Specimens

or 1 Green tube (Lithium Heparin)

Instructions

Centrifuge for complete separation of plasma or serum and red cells. Separate and refrigerate until tested.

Transport Temperature

Refrigerate

Specimen Stability

2-8°C up to 3 days

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

Prolonged application of a tourniquet during blood collection can result in a falsely elevated total protein

Methodology
Colorimetric

Setup Schedule

M, T, W, Th, F, Sa, Sun

Reference Range

See individual test components

Clinical Significance

Total protein and albumin tests may be ordered to help diagnose disease, to monitor changes in health status, and as a screen that may indicate the need for various follow-up tests.

Total protein measurements can reflect nutritional status and may be used to screen and help diagnose kidney or liver disease. If total protein is abnormal, further testing must be performed to identify which specific protein is low or high. Follow-up testing may include SPE (serum protein electrophoresis) or IGG, IGM, IGA.

The A/G ratio is calculated from measured total protein, measured albumin, and calculated globulin (total protein - albumin).

Performed By
Alverno Laboratories

Performing Laboratory
Alverno Central Lab
NCHB1 (Chemistry, Beckman AU)

Last Updated: April 25, 2023

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.