Sodium, Plasma, Serum, or Urine

Test Code

1089

CPT Codes
84295-Plasma or serum (if appropriate); 84300-Urine (if appropriate)

Preferred Specimen

Submit only 1 of the following specimens:

Plasma
Container/Tube: Green-top (heparin) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate plasma. 2. Label specimen appropriately (plasma).

Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of serum
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate serum. 2. Label specimen appropriately (serum).

Urine, 24-Hour
Collection Container/Tube: Plastic urine container(s)
Specimen Volume: 25 mL from a 24-hour urine collection
Collection Instructions: No preservative.
Note: 1. 24-Hour volume is required. 2. Follow instructions in Urine Collection in Special Instructions. 3. Indicate urine. 4. Label specimen appropriately (urine).

Urine, Random
Collection Container/Tube: Plastic urine container(s)
Specimen Volume: 25 mL from a random urine collection
Collection Instructions: No preservative.
Note: 1. Indicate urine. 2. Label specimen appropriately (urine).

Minimum Volume

Pediatric volume: 0.2 mL

Instructions

Urine Collection

Transport Temperature

Refrigerate

Methodology
Ion-Selective Electrode (ISE)

Setup Schedule

Monday through Sunday

Reference Range

PLASMA OR SERUM
136-145 mEq/L
Critical values (automatic call-back):
Neonates: <125 mEq/L or >150 mEq/L
Adults: <120 mEq/L or >150 mEq/L

URINE
40-220 mEq/24 hours

Performed By
CoxHealth

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.