GLUCOSE TOLERANCE NON-GESTATIONAL 2H POST 75G DOSE (FASTING, 2 HR)

Additional Codes

Software	Test Code
SoftID	GTTC2
EPIC	LAB11363

Performing Laboratory

NorDx Laboratories

Useful For

Diagnosing diabetes mellitus (non-gestational)

Method Name

Photometric/Hexokinase

Reference Values

Normal:

Fasting: 70-99 mg/dL

2 hours: 70-139 mg/dL

Prediabetes:

Fasting: 100-125 mg/dL

2 hour: 140-199 mg/dL

Diabetes:

Fasting: > = 126 mg/dL

2 hour: > = 200 mg/dL

Days and Times Test Performed

Monday through Sunday

Report Available

1 Day

Profile Information

Individual Test Description
GLUCOSE, 2 HOURS POST 75G CHALLENGE
GLUCOSE, BASELINE (PRE- CHALLENGE)

Specimen Type

Serum

Preferred Container

Serum Separator Tube (SST)

Preferred Volume

Serum: 1 mL (Serum Separator Tube (SST))

Minimum Volume

Serum: 0.3 mL (Serum Separator Tube (SST))

Specimen Collection and Handling

1. Draw a fasting specimen in either a plain red-top tube or serum gel tube. A gray sodium fluoride tube may be substituted if the specimen cannot be spun and separated within two hours of collection (send refrigerated).

2. Label with required patient identification and collection information, and include “fasting” on the label.

3. After Glucola has been administered draw a specimen at the 2 hour time interval using the specimen collection criteria noted above.

To Process:

Spin specimen, separate from clot within 2 hours and send refrigerated.

Specimen Stability Information

Specimen Type: Serum

Refrigerated: 3 Days

Must be spun/separated within: 2 Hours

Add On Capable

Not Permitted

Advance Beneficiary Notice Requirements

This test, when ordered on Medicare patients, is subject to the National Coverage Determination (NCD) policies. Please verify that the diagnosis code (ICD code) you have chosen demonstrates medical necessity for the test as documented in the physician’s patient record. The CMS web site is available to assist you with this verification. A properly executed Advance Beneficiary Notice (ABN) must be submitted with the specimen if medical necessity is not demonstrated by the ICD code chosen.

CPT Code Information

CPT Code	CPT Description	CPT Disclaimer
82947	Glucose, Quantitative, Blood (Except Reagent Strip)
82950	Glucose, Quantitative, Post Glucose Dose (Includes Glucose)

Keywords

GLUCOSE

GTT

Performing Laboratory Location