Free Progesterone Profile

Test Code

CPT Codes
84144 (x2)<br /> **This test is not available for New York patient testing.**

Preferred Specimen
3 mL serum collected in a red-top tube (no gel)

Patient Preparation
Patient should not be on any Corticosteroid, ACTH, Estrogen, or Gonadotropin medication, if possible, for at least 48 hours prior to collection of specimen.

Minimum Volume
1 mL

Other Acceptable Specimens
Plasma collected in an EDTA (lavender-top) tube

Transport Temperature

Specimen Stability
Room temperature: 24 hours
Refrigerated: 7 days
Frozen: 90 days

"Free" Progesterone is measured by radioimmunoassay following ultrafiltration of specimens

Setup Schedule
Set up: Mon-Fri; Report available: 6-8 business days

Reference Range
See Laboratory Report

Clinical Significance
Progesterone is a Progestin produced primarily from enzymatic metabolism of Pregnenolone. It is enzymatically converted to 17-Hydroxy Progesterone and 11-Deoxycorticosterone. It is secreted by both the gonads and the adrenal glands. It is mostly bound to Cortisol Binding Globulin and Albumin, but a small percentage is present in the "Free" form. This "Free" Progesterone is the bioactive moiety. It is excreted into the urine primarily as "Free" unconjugated Progesterone and as Pregnanediol. Progesterone is responsible for cellular changes in the cervix, vagina, and uterus. Levels are lowest in the follicular phase and increase rapidly following the luteal surge. Increased Progesterone inhibits ovulation. "Free" Progesterone increases greatly during pregnancy reaching about 20% of the total Progesterone concentration at delivery. Measurement of Progesterone can be useful to monitor fertility, corpus luteum function, endometrial development, and be helpful in in-vitro fertilization patients.

Performing Laboratory
Inter Science Institute
944 W Hyde Park Blvd
Inglewood, CA 90302

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.