Ordering Recommendation

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Stool: Entire 24-, 48-, or 72-hour stool collection. 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.
AND Serum: Serum separator tube (SST) or Plasma: Plasma separation tube (PST). Also acceptable: Lavender (EDTA) or pink (K2EDTA).

Specimen Preparation

Stool: Refer to instructions in Stool Collection-Timed Specimens (24, 48, 72 Hours) under Specimen Handling at https://www.aruplab.com. Submit entire 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: 5 g)
Serum or Plasma: Collect blood during the stool collection time interval. Allow serum to clot completely at room temperature. Separate from cells ASAP or within 2 hours of collection. Transfer 0.5 mL to an ARUP Standard Transport Tube. (Min: 0.2 mL)

Storage/Transport Temperature


Unacceptable Conditions

Stool: Specimens in media or preservatives. Serum or Plasma: Hemolyzed.


Stool: Ambient: 24 hours; Refrigerated: 7 days; Frozen: 3 months
Serum or Plasma: Ambient: 1 week; Refrigerated: 3 months; Frozen: 3 months (avoid freeze/thaw cycles)


Enzyme-Linked Immunosorbent Assay/Quantitative Immunoturbidimetry


Mon, Wed, Fri


1-3 days

Reference Interval

Test Number
Reference Interval
  Alpha-1-Antitrypsin 90-200 mg/dL
  Alpha-1-Antitrypsin Stool, ELISA 0.00-0.50 mg/g
  Alpha-1-Antitrypsin Stool-Clearance 1 - 49 mL/day

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)


If serum or plasma specimen is not submitted in conjunction with a timed stool collection, order Alpha-1-Antitrypsin, Quantitative by ELISA, Random Stool (ARUP test code 2011041).

Hotline History


CPT Codes

82103 x2


Component Test Code* Component Chart Name LOINC
0050001 Alpha-1-Antitrypsin 1825-9
2011042 Alpha-1-Antitrypsin Stool, ELISA 25303-9
2011044 Alpha-1-Antitrypsin Stool, ELISA-Time 13363-7
2011045 Alpha-1-Antitrypsin Stool, ELISA-Weight 30078-0
2011047 Alpha-1-Antitrypsin Stool-Clearance 18271-7
* 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.


Alpha-1-Antitrypsin Clearance, Quantitative by ELISA, Timed Stool