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22960 Porphobilinogen, Qualitative, Random Urine

Porphobilinogen, Qualitative, Random Urine
Test Code: PBG-QL
Synonyms/Keywords
PBG Qual​
Useful For
This test is useful for screening for defects and abnormalities in the chain of reactions involved in heme synthesis which may occur either in the bone marrow or in hepatic sites of synthesis. Abnormalities are accompanied by increased urinary and fecal excretion of various porphyrins, their precursors, or both. Increased porphobilinogen (PBG) values are found in acute intermittent porphyria.​
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)
No​ Urine​ Sage Cup​ Plastic tube​ 10 mL​ 5 mL​ 2 mL​
Collection Processing Instructions
Protect specimen from light immediately.​
Specimen Stability Information
Specimen Type Temperature Time
Urine​ Refrigerate​ 4 hours​
Frozen 1 month​
Rejection Criteria
Specimens not protected from light
Specimens that are not frozen (if not in lab within 4 hours)​
Interference
Concentrated urine samples and urines containing pyridium may form an orange color with Ehrlich's reagent, which may mask the pink PBG color​
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Friday​ 6-8 hours​ Ehrlich's
Test Information
This test was developed and its performance characteristics determined by Marshfield Labs.  It has not been cleared or approved by the US Food and Drug Administration.  This test is used for clinical purposes.  It should not be regarded as investigational or for research.
Reference Range Information
Performing Location Reference Range
Marshfield​ Negative​
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
84106​
Classification
This test was developed and its performance characteristics determined by Marshfield Labs.  It has not been cleared or approved by the US Food and Drug Administration.  This test is used for clinical purposes.  It should not be regarded as investigational or for research.
Synonyms/Keywords
PBG Qual​
Ordering Applications
Ordering Application Description
​Centricity ​Porphobilinogen, Qual
​Cerner ​Porphobilinogen Qualitative Urine
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)
No​ Urine​ Sage Cup​ Plastic tube​ 10 mL​ 5 mL​ 2 mL​
Collection Processing
Protect specimen from light immediately.​
Specimen Stability Information
Specimen Type Temperature Time
Urine​ Refrigerate​ 4 hours​
Frozen 1 month​
Rejection Criteria
Specimens not protected from light
Specimens that are not frozen (if not in lab within 4 hours)​
Interference
Concentrated urine samples and urines containing pyridium may form an orange color with Ehrlich's reagent, which may mask the pink PBG color​
Useful For
This test is useful for screening for defects and abnormalities in the chain of reactions involved in heme synthesis which may occur either in the bone marrow or in hepatic sites of synthesis. Abnormalities are accompanied by increased urinary and fecal excretion of various porphyrins, their precursors, or both. Increased porphobilinogen (PBG) values are found in acute intermittent porphyria.​
Reference Range Information
Performing Location Reference Range
Marshfield​ Negative​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Friday​ 6-8 hours​ Ehrlich's
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
84106​
Classification
This test was developed and its performance characteristics determined by Marshfield Labs.  It has not been cleared or approved by the US Food and Drug Administration.  This test is used for clinical purposes.  It should not be regarded as investigational or for research.
For most current information refer to the Marshfield Laboratory online reference manual.