Osmolality, Fecal 
Mnemonic FEC OSMO
CPT 84999
Test Code 1001085
Synonyms  
Test Includes  
Specimen Liquid stool
Volume 5.0 mL
Container Unpreserved (white) stool vial
Special Instructions CRITICAL FROZEN; freeze after collection.
Specimen Prep  
Storage Frozen
Transport Temp Frozen
Stability Rm Temp Unacceptable
Stability Refrig Unacceptable
Stability Frozen 1 Month
Methodology Quantitative Freezing Point
Rejection Criteria Formed stool. Specimens in media or preservatives. 
Reference Value 0-16 years: 271-296 mOsm/kg 17 years and older: 280-303 mOsm/kg 
Performed/TAT Monday - Sunday   Within 24 hours    
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