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Labcorp Oklahoma, Inc.
Test Directory


Index:

Osmolality Fecal

Order Name OSMO FEC
Test Number: 3502020
Revision Date 12/12/2022
Test Name Methodology LOINC Code
Osmolality Fecal
Freezing Point Depression 2693-0 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 15 mL Stool, Random Stool specimen container Frozen
Instructions Specimen Type: Small plastic container; do NOT use large paint can.
Specimen Storage: FREEZE
Specimen Collection: Stool sample must be collected without addition of water. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Specimen Stability: Ambient: Not Available, Refrigerated : Not Available, Frozen: Not Available
GENERAL INFORMATION
Expected TAT 2 - 4 days  
Clinical Use Useful for diagnosis of factitious diarrhea (where patient adds water to stool to simulate diarrhea). A stool osmo is used in conjunction with a serum osmo to calculate an osmotic gap. 
Performing Labcorp Test Code 120071 
Notes Labcorp Test Code: 120071
CPT Code(s) 84999
Lab Section Reference Lab