Laboratory Test Detail

Last Updated: September 25, 2023 @ 9:13 am


Glucose Tolerance, 2 Hr [ADA]

  • One Gray Top (2HR)
  • One Gray Top (FAST)

Also Acceptable:
  • One SST (2HR)
  • One SST (FAST)
  • Two 4 mL (Min:1 mL) Whole blood in Gray Top. Submit Refrigerated.

Also Acceptable:
  • Two 1 mL (Min:0.5 mL) Plasma . Submit Refrigerated. Submit in a Standard Transport Tube.
  • Two 1 mL (Min:0.5 mL) Serum in SST. Submit Refrigerated.
Special Handling:
  • Draw fasting specimen, then give 75gm glucola. At 2 hours draw "2 HR" post sample. Label tubes "Fasting" and 2 HR".

    Other alternative samples:
    Green Top (Li Hep), Lavender EDTA, Pink EDTA, Red Top.
    If using alternative serum or plasma separate from cells ASAP.
    Serum or plasma stability: Ambient 8 hrs, RF 3 days, FZ 1 month
Rejection Criteria:
  • Hemolyzed specimens
  • Microbially Contaminated
  • Unlabled Specimens
Stability:Ambient: 1 Day(s); Refrigerated: 3 Day(s); Frozen: Unacceptable; Incubated: Unacceptable
  • Colorimetric
  • Kinetic
Reported:1-3 Day(s)
CPT Codes:
  • 82947
  • 82950
Interpretive Data:Please see report for interpretive data.
Note: Gestational Diabetes Screen and Glucose, Fasting reference range changes as of 2/18/2020
  • 10201 - GLUCOSE, FASTING
  • 10202 - GLUCOSE, 2HR
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