Alpha-1 antitrypsin (AAT) testing uses a sample of blood or a cheek swab to diagnose a condition called alpha-1 antitrypsin deficiency (AAT deficiency). This condition is sometimes known as "alpha-." or AATD. If you have AAT deficiency, your body doesn't make enough AAT.
Source: MedlinePlus, U.S. National Library of Medicine
Normal range
- Normal
- 90–200 mg/dL (varies by lab) ARUP 90–200 · Mayo 100–190 mg/dL
These labs do not agree: the published adult ranges differ by up to 11%, so the same result can read as normal at one lab and be flagged at another — ARUP 90–200 · Mayo 100–190 mg/dL. Both are real published values, shown as each lab states them.
Ranges from ARUP Laboratories Test Directory, Mayo Clinic Laboratories (Pediatric Test Catalog).
All 5 source ranges
What an abnormal result can be associated with
- A high result
- Decreased circulating alpha-1-antitrypsin concentration
- A low result
- Decreased circulating alpha-1-antitrypsin concentration
Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis — only a clinician can interpret your result in context.
Details
- Sample
- Serum or plasma · LOINC
- Listed under
- Alpha-1 Antitrypsin Deficiency · COPD · Emphysema
- Code
- LOINC 1825-9 · mg/dL
- Also known as
- Genetics, Heritable, A1A, AAT, A1AT