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Specimen Collection Manual and Test Catalog

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GLUCOSE

Geisinger Epic Procedure Code:  LAB2359    Geisinger Epic ID:  14349

SPECIMEN COLLECTION
Specimen type: 

Plasma or serum


Preferred collection container: 
Specimen required: 

2 mL of serum or plasma; minimum 0.5 mL


Special notes: 

Outreach clients: Specimen may also be collected in grey-top tubes. Place specimen on ice, or centrifuge and separate plasma from cells.


Patient preparation: 

Fasting specimen is not required. For fasting glucose, please order Fasting Plasma Glucose (GLUFP).



SPECIMEN PROCESSING
Processing instructions: 

Allow serum to clot. Centrifuge to separate serum or plasma within 2 hours of collection.


Transport temperature: 

Refrigerated (preferred) or room temperature.


Specimen stability: 

Spun SST: Room temperature 8 hours; refrigerated 3 days. 
Spun PST: Room temperature 4 hours; refrigerated 8 hours. 
Grey-top: 3 days (spun and unspun).


Rejection criteria: 

For specimens collected in anything other than grey-top tubes, specimen is not acceptable for glucose testing if not centrifuged within 2 hours of collection.



TEST DETAILS
Reference interval: 

0-31 days: 45-90 mg/dL 
>= 32 days: 70-120 mg/dL


Critical values/courtesy alerts: 
Below 45, above 500 mg/dL
CPT code(s):  82947
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Test includes: 

Glucose.


Methodology: 
Spectrophotometric (Colorimetric)
Synonyms: 

Blood sugar, FBS, GLU


Clinical significance: 

Glucose levels are used in the diagnosis and treatment of carbohydrate metabolic disorders including diabetes mellitus, idiopathic hypoglycemia, and pancreatic islet cell neoplasm.


Doctoral Director(s): 
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC
Review Date:  12/27/2024

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