| Name | Section | Code | Countries | |
|---|---|---|---|---|
| 1 hour Glucose, 1 hour after 75 g · mmol/L Clinical chemistry · 51597-3 | Clinical chemistry | 51597-3 | All | |
| 2 hours Glucose, 2 hours after 75 g · mmol/L Clinical chemistry · 14995-5 | Clinical chemistry | 14995-5 | All | |
| AAT Alpha-1 antitrypsin · mg/dL Clinical chemistry · 1825-9 | Clinical chemistry | 1825-9 | All | |
| Abacavir susceptibility (genotypic) Abacavir susceptibility (genotypic) Molecular · 30287-7 | Molecular | 30287-7 | All | |
| ACTH ACTH · pg/mL Endocrinology · 2141-0 | Endocrinology | 2141-0 | All | |
| ADA Adenosine deaminase · U/L Clinical chemistry · 35704-6 | Clinical chemistry | 35704-6 | All | |
| Adequacy Specimen adequacy Cytology · 19764-0 | Cytology | 19764-0 | All | |
| AFB Acid-fast bacilli Microbiology · 11545-1 | Microbiology | 11545-1 | All | |
| AFP AFP · ng/mL Endocrinology · 1834-1 | Endocrinology | 1834-1 | All | |
| Alb Albumin · g/L Clinical chemistry · 1751-7 | Clinical chemistry | 1751-7 | All | |
| Allergy panel Allergen-specific IgE panel Serology and immunology | Serology and immunology | — | All | |
| ALP Alkaline phosphatase (ALP) · U/L Clinical chemistry · 6768-6 | Clinical chemistry | 6768-6 | All | |
| ALT Alanine aminotransferase (ALT) · U/L Clinical chemistry · 1742-6 | Clinical chemistry | 1742-6 | All | |
| AMH Anti-Müllerian hormone · ng/mL Endocrinology · 38476-8 | Endocrinology | 38476-8 | All | |
| Amikacin Amikacin susceptibility Microbiology · 18860-7 | Microbiology | 18860-7 | All | |
| AMK Amikacin resistance Molecular · 72864-2 | Molecular | 72864-2 | All | |
| Amoxicillin-clavulanate Amoxicillin-clavulanate susceptibility Microbiology · 18862-3 | Microbiology | 18862-3 | All | |
| Amphetamine, urine screen Amphetamine, urine screen Clinical chemistry · 19343-3 | Clinical chemistry | 19343-3 | All | |
| Ampicillin Ampicillin susceptibility Microbiology · 18864-9 | Microbiology | 18864-9 | All | |
| Ampicillin-sulbactam Ampicillin-sulbactam susceptibility Microbiology · 18865-6 | Microbiology | 18865-6 | All | |
| Amylase Amylase · U/L Clinical chemistry · 1798-8 | Clinical chemistry | 1798-8 | All | |
| Anti-CCP Anti-cyclic citrullinated peptide antibodies · U/mL Serology and immunology · 53027-9 | Serology and immunology | 53027-9 | All | |
| Anti-dsDNA Anti-double-stranded DNA antibodies · [IU]/mL Serology and immunology · 5130-0 | Serology and immunology | 5130-0 | All | |
| Anti-HBc total Hepatitis B core antibody, total Serology and immunology · 16933-4 | Serology and immunology | 16933-4 | All | |
| Anti-HBs Hepatitis B surface antibody Serology and immunology · 22322-2 | Serology and immunology | 22322-2 | All |