XY, Blood — FISH Analysis

CPT Code(s): 88230, 88273, 88271 (x per probe)

Ordering Recommendation: Detection of patient gender in dividing or non-dividing cells. No additional specimen required in conjunction with chromosome study.

Synonyms: XX male, XX sex reversal

Methodology: Fluorescence in situ hybridization (FISH) analysis.

Performed: Monday through Friday

Reported: 5-7 days

Collect: Whole blood in dark green-top sodium heparin tube.

Specimen Volume: Infants: 2-4 mL; Adults: 7-10 mL

Storage/Transport: Room temperature. Do not freeze or expose to extreme temperatures.

Unacceptable Conditions: Frozen specimens. Clotted specimens.

Stability: Ambient: 48 hours; Frozen: Unacceptable.