Chlamydia trachomatis / Neisseria gonorrhoeae NAAT

This test is used to screen for and diagnose the sexually transmitted infections Chlamydia trachomatis and Neisseria gonorrhoeae.

Portal Ordering Code: CTNG
CPT Code(s): 87491, 87591

Fee Schedule

Storage and Transport Criteria: Specimen Storage Specimen Transport

Acceptable Specimens

Minimum Volume

Frozen Range
-70°C - 0°C

Refrigerated Range
0.1°C - 8°C

Room Temperature Range
8.1°C - 30°C

Stability at
4°C - 25°C

Urine (unprocessed) 7 mLs Reject Acceptable for both M/F at 4°C up to 8 days Acceptable RT up to 24 hours for F, Acceptable RT up to 72 hours for M 8 hours

Urine (in Cepheid Xpert Urine Transport Reagent) 7 mLs Reject Acceptable at 2°C – 15°C up to 45 days Acceptable at 2°C – 30°C up to 72 hours for F, 2°C – 30°C up to 45 days for M 8 hours

Vaginal/endocervical swab in Xpert Swab Transport Reagent 2 mLs Reject Acceptable at 2°C – 30°C up to 60 days Acceptable at 2°C – 30°C up to 60 days 8 hours
Includes: Chlamydia trachomatis NAA and Neisseria gonorrhoeae NAA
Methodology: NAAT
Assay Category: FDA Approved
Reference Range: See laboratory report
Alternative Names: CT/GC

CT/NG

CT/NG Xpert

Chlamydia

Gonorrhea

STI

STD
Preferred Specimen(s): Urine (unprocessed)

Urine (in Cepheid Xpert Urine Transport Reagent)

Vaginal/endocervical swab in Xpert Swab Transport Reagent
Alternative Specimen(s): N/A
Minimum Volume: Urine (unprocessed) - 7 mLs

Urine (in Cepheid Xpert Urine Transport Reagent) - 7 mLs

Vaginal/endocervical swab in Xpert Swab Transport Reagent - 2 mLs
Special Instructions: Urine (in Cepheid Xpert Urine Transport Reagent)

Collect using Xpert Urine Specimen Collection Kit

Vaginal/endocervical swab in Xpert Swab Transport Reagent

Collect using Xpert Vaginal/Endocervical Specimen Collection Kit per manufacturer's recommendation
Reject Criteria: Inadequately labeled specimens

Leaking specimens

QNS (quantities not sufficient)

Specimens not meeting the Storage & Transport criteria upon receipt at laboratory
Setup Schedule: Testing is performed on an as-needed basis.
Turn around time (TAT): 2 business days from arrival at the lab

Acceptable Specimens	Minimum Volume	Frozen Range -70°C - 0°C	Refrigerated Range 0.1°C - 8°C	Room Temperature Range 8.1°C - 30°C	Stability at 4°C - 25°C
		Specimen Storage			Specimen Transport
Urine (unprocessed)	7 mLs	Reject	Acceptable for both M/F at 4°C up to 8 days	Acceptable RT up to 24 hours for F, Acceptable RT up to 72 hours for M	8 hours
Urine (in Cepheid Xpert Urine Transport Reagent)	7 mLs	Reject	Acceptable at 2°C – 15°C up to 45 days	Acceptable at 2°C – 30°C up to 72 hours for F, 2°C – 30°C up to 45 days for M	8 hours
Vaginal/endocervical swab in Xpert Swab Transport Reagent	2 mLs	Reject	Acceptable at 2°C – 30°C up to 60 days	Acceptable at 2°C – 30°C up to 60 days	8 hours