Ordering Recommendation

Measurement of fecal fats can be useful for establishing a diagnosis of pancreatic disease. Testing requires the submission of an entire 72-hour stool collection. For random stool collections, order Fat, Fecal Qualitative (0020385). For testing of an aliquot from a 24-, 48-, or 72-hour stool collection, order Fat, Fecal Quantitative, Homogenized Aliquot (2002350). For complete 24-hour stool collections, order Fat, Fecal Quantitative, 24-Hour Collection (Includes Homogenization) (2002354). For complete 48-hour stool collections, order Fat, Fecal Quantitative, 48-Hour Collection (Includes Homogenization) (2002355).

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

The patient should be on a diet consisting of 50 to 150 g of fat per day for 3 days prior to the study. Non-absorbable fat substitutes, such as olestra, should be avoided prior to collection.


72-hour stool. Refrigerate during collection. Provide patient a Timed Stool Collection Kit (ARUP supply #44192) available online through eSupply using ARUP Connect™ or contact ARUP Client Services at (800) 522-2787.

Specimen Preparation

Refer to instructions in Stool Collection-Timed Specimens (24, 48, 72 Hours) under Specimen Handling at https://www.aruplab.com. Submit entire 72-hour stool collection in an ARUP approved transport container(s) provided in kit using additional containers as needed for the full collection (available separately, ARUP supply #28077). (Min: 4 g)

Storage/Transport Temperature


Unacceptable Conditions

Random collections. Specimens containing barium or charcoal. Specimens in media or preservatives. Containers larger than 500 mL (500 g), such as paint cans, will be rejected and discarded.


Ambient: 1 hour; Refrigerated: 4 days; Frozen: 2 weeks


Nuclear Magnetic Resonance Spectroscopy




2-3 days

Reference Interval

0-5 years: 0.0-2.0 g/24h
6 years and older: 0.0-6.0 g/24h

Interpretive Data

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.

Compliance Category

Laboratory Developed Test (LDT)


Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
0020377 Fecal Total Weight 30078-0
0060772 Fat, Fecal Quantitative 72-Hour 2271-5
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


  • Fecal fat 72 hour and homogenization
Fat, Fecal Quantitative 72-Hour Collection (Includes Homogenization)