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FBS
GLUCOSE, FASTING, SERUM

Test Code FBS 
Test GLUCOSE, FASTING, SERUM 
Methodology Spectrophotometric (SP) 
Description Useful for the evaluation of carbohydrate metabolism, acidosis and ketoacidosis, dehydration, diabetes mellitus, or hypoglycemia.

Note: This test, when ordered on Medicare patients, is subject to the National Coverage Determination (NCD) policy “Blood Glucose Testing.” Please verify that the diagnosis code (ICD-9) you have chosen demonstrates medical necessity for the test as documented in the physician’s patient record. The CMS web site or NorDx Limited Coverage Documentation Guide 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-9 code chosen. 

Specimen Draw blood in a plain, red-top tube(s) or a serum gel tube(s). (Hemolyzed specimen is not acceptable.) Spin down, separate serum from clot within 2 hours of draw, and send 1.0 mL (minimum volume: 0.3 mL) of serum refrigerated. 
Reference Values 70 - 99 mg/dL
Critical values (automatic call-back):<= 40 mg/dL or >= 500 mg/dL 
Analytic Time 1 Day 
Day(s) Test Set Up Monday through Sunday 
CPT Code(s) 82947