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Test ID BLOD1230 Alpha-1-Antitrypsin Proteotype S/Z by LC-MS/MS, Serum

Useful For

Determining the specific proteotype for prognosis and genetic counseling for patients with alpha-1-antitrypsin deficiency

Profile Information

Test ID Reporting Name Available Separately Always Performed
A1ASZ A1AT Proteotype S/Z, LC-MS/MS No Yes
AATP Alpha-1-Antitrypsin, S Yes, (order AAT) Yes

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
A1APR Alpha-1-Antitrypsin Phenotype, S Yes, (order A1APP) No

Testing Algorithm

If the mass spectrometry proteotype and quantitative serum level are discordant, then phenotyping will be added and performed at an additional charge.


See Alpha-1-Antitrypsin-A Comprehensive Testing Algorithm in Special Instructions.

Reporting Name

A1AT Proteotype S/Z, LC-MS/MS, S

Specimen Type


Specimen Required


Preferred: Red top

Acceptable: Serum gel

Specimen Volume: 1.25 mL

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 28 days
  Ambient  28 days
  Frozen  28 days

Reject Due To


Mild OK; Gross OK


Mild OK; Gross reject


Mild OK; Gross OK



Reference Values


100-190 mg/dL



Negative for S and Z phenotype (Non S Non Z)

Day(s) and Time(s) Performed

Monday, Thursday; 10 a.m.

Analytic Time

7 days

Performing Laboratory

Mayo Medical Laboratories in Rochester

CPT Code Information


82542-A1AT proteotype S/Z, LC-MS/MS

82104-Alpha-1-antitrypsin phenotype (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
A1ALC A1AT Proteotype S/Z, LC-MS/MS, S In Process


Result ID Test Result Name Result LOINC Value
AATP Alpha-1-Antitrypsin, S 6771-0
34855 A1AT Proteotype S/Z, LC-MS/MS 49244-7

Method Name

A1ASZ: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

AATP: Nephelometry

A1APR: Isoelectric Focusing

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.


If not ordering electronically, complete, print, and send a Gastroenterology and Hepatology Test Request Form (T728) with the specimen (