PHOSPHORUS, SERUM

Test Code

PO4

Alias/See Also

Phosphate

CPT Codes
84100

Preferred Specimen

Gold Tube (SST)

Patient Preparation
None

Minimum Volume

1 mL

Other Acceptable Specimens

Red Tube

Transport Container

GOLD Tube

Transport Temperature

Room temperature

Specimen Stability

15-30°C up to 8 hours (serum)
2-8°C up to 7 days

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

Hemolyzed

Methodology
Phosphomolybdate-UV

Setup Schedule

DAILY, as received

Report Available

STAT: <60 minutes
Routine: <4 hours

Reference Range

Female Ages >=0 Days - <1 Day: Normal Range: 3.5-8.6 mg/dL Female Ages >=1 Day - <2 Days: Normal Range: 5.5-9.5 mg/dL Female Ages >=2 Days - <1 Year: Normal Range: 4.5-6.5 mg/dL Female Ages >=1 Year - <12 Years: Normal Range: 4.5-5.5 mg/dL Female Ages >=12 Years - <60 Years: Normal Range: 2.5-5.0 mg/dL Female Ages >=60 Years: Normal Range: 2.8-4.1 mg/dL Male Ages >=0 Days - <1 Day: Normal Range: 3.5-8.6 mg/dL Male Ages >=1 Day - <2 Days: Normal Range: 5.5-9.5 mg/dL Male Ages >=2 Days - <1 Year: Normal Range: 4.5-6.5 mg/dL Male Ages >=1 Year - <12 Years: Normal Range: 4.5-5.5 mg/dL Male Ages >=12 Years - <60 Years: Normal Range: 2.5-5.0 mg/dL Male Ages >=60 Years: Normal Range: 2.3-3.7 mg/dL
Reference ranges may vary based on performing lab. Use lab reports when interpreting patient results.

Clinical Significance

This test is used to evaluate phsophorus metabolism and calcium/phsophorus balance. In addition, this test is useful in the diagnosis and treatment of parathyroid gland and kidney disease along with Vitamin D imbalance.

Performing Laboratory
Mount Sinai Hospital
Holy Cross Hospital

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.