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Vanderbilt Pathology Laboratory Services

Test Directory



GRAM STAIN (GS)

Department: Microbiology
Test Synonym(s): GS, Gram Stain Urine, Gram Stain Stool, WBC Stool
CPT Codes: 87205
Methodology: Gram stain
Tube Type: Sterile container
Specimen: Specify source: urine or stool
Volume: Urine: 1 mL Stool: 1 g
Minimum Volume: Urine: 1 mL Stool: 1 g
Temperature: Room temperature
Stability: Send to lab immediately
Reasons for Rejection: Non sterile or leaking container. Delay in transport.
Days Performed: Daily
Times Performed: Continuous
TAT: 2-4 hours
Special Instructions: For stool or urine only. Stool specimens are examined for WBC's only. Urine specimens are examined for WBC's and bacteria. Gram stain is included in the culture order for other specimens when appropriate and should not be ordered separately.

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