hCG with Gestational Table [19485X]

Test Code
19485

CPT Codes
84702

Preferred Specimen
1 mL serum

Minimum Volume
0.3 mL

Transport Container
Plastic screw-cap vial

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days

Methodology
Immunoassay (IA)

Setup Schedule
Set up: Daily a.m. nights; Report available: Next day

Reference Range

Gestational Age
Expected hCG Values
(mIU/mL)
<1 Week 5-50
1-2 Weeks 50-500
2-3 Weeks 100-5000
3-4 Weeks 500-10000
4-5 Weeks 1000-50000
5-6 Weeks 10000-100000
6-8 Weeks 15000-200000
2-3 Months 10000-100000

The table above provides only a very rough estimate of gestational age and should be used only in conjunction with other methods for establishing gestational age. Much more reliable and accurate estimations of gestational age may be obtained by using LMP or ultrasound.

Clinical Significance
hCG may reach detectable limits within 7-10 days of conception. hCG is produced by the placenta and reaches a peak between the 7th and 10th week of gestation. hCG is a glycoprotein hormone produced by the syncytiotrophoblast of the placenta and secreted during normal pregnancy and with pathologic conditions such as hydatidiform mole, choriocarcinoma and testicular neoplasm. Order hCG, Total, Qualitative, Urine if hCG serum result is inconsistent with clinical presentation.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153




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.