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Lab Test Dictionary

Cortisol, Saliva (SALCT) (Back-Up Only)


Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)


Nighttime Salivary Cortisol; Salivary Cortisol; Salivary Cushings; Salivary Hydrocortisone

Specimen Type

See Collection Instructions

Performing Lab

Mayo Medical Lab

Epic ID

Other Reference Test

Lab Test Days

Monday, Wednesday, Friday; 4 P.M.

Standard TAT

2-4 Days

Collection Information

Specimen Required

0.6-1.5 Saliva collected in a SARSTEDT Salivette Collection Kit

Container Type

See Below

Collection Instructions

Call lab for SARSTEDT Salivette Collection Kit located in the send out cupboard. Patient Preparation: 1. Do not brush teeth before collecting specimen. 2. Do not eat or drink for 15 minutes prior to specimen collection. Collection Instructions: 1. Collect specimen between 11 p.m. and midnight, and record collection time. 2. To use the Salivette: a. Remove top cap of container to expose swab. b. Place swab directly into mouth by tipping container so swab falls into mouth. Do not touch swab with fingers. c. Keep swab in mouth for approximately 2 minutes. Roll swab in mouth, do not chew swab. d. Place swab back into its container without touching, and replace the cap. 3. Record collection time, and send appropriately labeled Salivette to laboratory.

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp: 7 Days; Refrigerated: 7 Days (Preferred); Frozen: 60 Days

Test Volume Required

1.5 mL Saliva

Minimum Test Volume

0.6 mL Saliva

Processing Instructions

Order in Mayolink and send with Mayo courier Monday-Friday.


Reference values are also available for 8 A.M. (7 A.M.-9 A.M.) and 4 P.M. (3 P.M.-5 P.M.) collections, however, 11 P.M. to midnight collection is preferred.

CPT Codes