Smith-Magenis, Cytogenetics FISH Study

Tube Type

Test ID		LAB5505A
CPT Code(s)		88271x2, 88273, 88230 (if performed), 88291
Group/Individual Test		Individual
Laboratory		Cytogenetics
Tube Station		30 (Core Laboratory)
Specimen	Routine:	5 mL whole blood/Green Sodium Heparin Tube; See Comments for additional specimen information
	Micro:	2-5 mL whole blood Pediatric: Sodium Heparin/Green Top Tube If additional testing is requested, a larger sample may be requested
Availability	Routine:	24 Hours/7 Days
	Rush:	RUSH STATUS AVAILABLE 24 hours/7days in lieu of STAT
Turnaround Time	Routine:	<28 days
	Rush:	Preliminary 3 working days with Final within 14 days
Reference Range	Normal:	N/A
Comments		Deliver sample to the Core Laboratory. If post-mortem, obtain by cardiac puncture within 1 hour. Keep at room temperature. Call the Cytogenetics Lab at 984-974-1790. A peripheral blood karyotype must have already been performed or ordered in conjunction with this test.

Reviewed by J. Carr on January 14, 2026

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514