Skip Ribbon Commands
Skip to main content
Sign In
Navigate Up

25298 Pregnenolone, Serum (PREGN)

Pregnenolone, Serum (PREGN)
Test Code: PREGNSO
Useful For

​- An ancillary test for congenital adrenal hyperplasia, particularly in situations in which a diagnosis of 21-hydrolase and 11-hydrolase deficiency have been ruled out. 

- Confirming a diagnosis of 3-beta-hydroxy dehydrogenase deficiency.

Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
​No ​Serum ​Red Top Tube (RTT) ​Serum Separatory Tube (SST) ​1.0 mL ​0.5 mL ​
Specimen Stability Information
Specimen Type Temperature Time
​Serum ​ Frozen ​14 days
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Mayo Medical Laboratories ​Monday, Tuesday, Thursday ​2 days ​LC-MS/MS
Reference Lab
Mayo Clinic Laboratories
Reference Range Information
Performing Location Reference Range
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
​84140 ​ ​1 ​ ​
Ordering Applications
Ordering Application Description
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
​No ​Serum ​Red Top Tube (RTT) ​Serum Separatory Tube (SST) ​1.0 mL ​0.5 mL ​
Specimen Stability Information
Specimen Type Temperature Time
​Serum ​ Frozen ​14 days
Useful For

​- An ancillary test for congenital adrenal hyperplasia, particularly in situations in which a diagnosis of 21-hydrolase and 11-hydrolase deficiency have been ruled out. 

- Confirming a diagnosis of 3-beta-hydroxy dehydrogenase deficiency.

Reference Range Information
Performing Location Reference Range
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Mayo Medical Laboratories ​Monday, Tuesday, Thursday ​2 days ​LC-MS/MS
Reference Lab
Mayo Clinic Laboratories
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
​84140 ​ ​1 ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.