hCG with Gestational Table

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: Mon-Sat; Report available: 1-2 days

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.