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22654 Gastrin

Gastrin
Test Code: GAST
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
Yes​ Serum​ Red Top Tube(RTT)​ ​ 1.0 mL​ 0.5 mL​ 0.4 mL​
Collection Processing Instructions

Patient must be fasting a minimum of ten hours for fasting level.

Proton-pump inhibiting medications (omeprazole) should be discontinued 5 days before blood draw

High doses of exogenous biotin (also termed Vitamin B7, Vitamin H or Coenzyme R) may interfere with this assay. It is recommended that patients refrain from consuming any multivitamin or supplement containing biotin for at least 72 hours prior to collection of a blood sample.

Separate serum from cells within 2 hours of collection.

Specimen Stability Information
Specimen Type Temperature Time
Serum​ Refrigerated​ 12 hours​
Frozen​ 30 days​
Rejection Criteria
Grossly Hemolyzed
Grossly lipemic
Heat treated
Contaminated with microbes​
Interference
​High doses of exogenous biotin (also termed Vitamin B7, Vitamin H or Coenzyme R) may interfere with this assay.
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday and Thursday 1 day​ Automated Chemiluminescent Immunometric Assay​
Test Information

The drug asfotase alfa (STRENSIQ), a recombinant form of alkaline phosphatase, is expected to interfere with in vitro diagnostic assays utilizing an alkaline phosphatase detection system. Test samples from patients taking asfotase alfa with a non-alkaline phosphatase methodology.​

Reference Range Information
Performing Location Reference Range
Marshfield​ 0-100 pg/mL (fasting)​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82941   ​ ​ ​ ​ ​
Ordering Applications
Ordering Application Description
​Cerner
​​Gastrin Level

If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
Yes​ Serum​ Red Top Tube(RTT)​ ​ 1.0 mL​ 0.5 mL​ 0.4 mL​
Collection Processing

Patient must be fasting a minimum of ten hours for fasting level.

Proton-pump inhibiting medications (omeprazole) should be discontinued 5 days before blood draw

High doses of exogenous biotin (also termed Vitamin B7, Vitamin H or Coenzyme R) may interfere with this assay. It is recommended that patients refrain from consuming any multivitamin or supplement containing biotin for at least 72 hours prior to collection of a blood sample.

Separate serum from cells within 2 hours of collection.

Specimen Stability Information
Specimen Type Temperature Time
Serum​ Refrigerated​ 12 hours​
Frozen​ 30 days​
Rejection Criteria
Grossly Hemolyzed
Grossly lipemic
Heat treated
Contaminated with microbes​
Interference
​High doses of exogenous biotin (also termed Vitamin B7, Vitamin H or Coenzyme R) may interfere with this assay.
Reference Range Information
Performing Location Reference Range
Marshfield​ 0-100 pg/mL (fasting)​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday and Thursday 1 day​ Automated Chemiluminescent Immunometric Assay​
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82941   ​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.