| Symbols and Numbers |
| ψ | Psychiatry or psychology |
| μg | Micrograms |
| 5-HT | Serotonin |
| A | |
| ABC | Airway, breathing, and circulation |
| ABGs | Arterial blood gases |
| ABO | Antibody screen |
| ac | Antes comer or before meals |
| ACTH | Adrenocorticotropic hormone |
| AD | Alzheimer's disease |
| ADD | Attention deficit disorder |
| ADH | Antidiuretic hormone |
| ADHD | Attention deficit-hyperactivity disorder |
| ADR | Adverse drug reaction |
| AIDS | Acquired immunodeficiency syndrome |
| ALT | Alanine aminotransferase |
| AMBU | Air-shields manual breathing unit |
| AML | Acute myelogenous leukemia; acute myeloid leukemia |
| ANS | Autonomic nervous system |
| AP view | Anteroposterior view; Towne's view |
| AS | Ankylosing spondylitis |
| A.S.A.P. | As soon as possible |
| ASD | Autism spectrum disorder |
| AST | Aspartate aminotransferase |
| ATA | Anterograde amnesia |
| AV | Atrioventricular |
| B | |
| BaFPE | Bay area functional performance evaluation |
| BCG | Bacille Calmette-Guérin (tuberculosis vaccine) |
| BGT | Blood glucose level |
| BMD | Becker's muscular dystrophy |
| BP | Blood pressure |
| BPD | Bipolar disorder |
| BPD | Bronchopulmonary dyplasia |
| BPH | Benign prostatic hyperplasia |
| BPMD | Benign pseudohypertrophic muscular dystrophy |
| BR | Bed rest |
| BS | Breath sounds |
| BSA | Body surface area |
| BSW | Bachelor of social work (degree) |
| BUN | Blood urea nitrogen |
| C | |
| Ca | Cancer |
| Ca | Chemical symbol for calcium |
| CA | Cancer |
| CA | Cancer antigen |
| CA | Cardiac arrest |
| CA | Chronological age |
| CA | Cytosine arabinoside |
| CAD | Coronary artery disease |
| CAM | Cognitive assessment of Minnesota |
| CAT | Computed axial tomography |
| CBC | Complete blood count |
| CEA | Carcinoembryonic antigen |
| CF | Cold formula |
| Cl | Chloride |
| CIS | Cancer in situ |
| CK | Symbol for creatinine |
| CK | Total creatinine kinase |
| CML | Chronic myelogenous leukemia; chronic myeloid leukemia |
| CNA | Certified nursing assistant |
| CNS | Central nervous system |
| CO2 | Carbon dioxide |
| COPD | Chronic obstructive pulmonary disease |
| COTNAB | Chessington occupational therapy neurological assessment battery |
| CPAP | Continuous positive airway pressure |
| CPK | Creatinine phosphokinase |
| CPK-MD | Creatinine kinase |
| CPU | Central processing unit |
| CRT | Certified respiratory technician |
| CSF | Cerebrospinal fluid |
| CT | Computer axial tomography |
| CV | Cardiovascular |
| CVA | Cerebrovascular accident |
| D | |
| DAI | Diffuse axonal injury |
| DAT | Dementia of the Alzheimer's type |
| DDM | Doctor of dental medicine |
| DDS | Doctor of dental surgery |
| DDST-II | Denver developmental screening test II |
| DI | Diagnostic imaging |
| DIAL3 | Developmental indicators for the assessment of learning |
| DID | Dissociative identity disorder |
| dL | Deciliter |
| DM | Dextromethorphan |
| DM | Diabetes mellitus |
| DNA | Deoxyribonucleic acid |
| E | |
| E. coli | Escherichia coli |
| ECG | Electrocardiogram |
| ED | Erectile dysfunction |
| ED | Emergency department |
| EDH | Epidural hematoma |
| EEG | Electroencephalogram |
| EMD | Emergency medical dispatcher |
| EMT | Emergency medical technician |
| ER | Emergency room |
| ER | Extended release |
| ESI-R | Early screening inventory-revised |
| ETA | Estimated time of arrival |
| ETOH abuse | Alcoholism |
| F | |
| FASIAR | Follicle aspiration, sperm injection, and assisted follicular rupture |
| FBS | Fasting blood sugar (test) |
| FHM | Fetal heart monitor |
| FHR | Fetal heart rate |
| FIM | Functional independence measure |
| FNA | Fine-needle aspiration biopsy |
| FNAC | Fine-needle aspiration cytology |
| FSH | Follicle-stimulating hormone |
| G | |
| GAD | Generalized anxiety disorder |
| GAF | Global assessment of functioning |
| GARS | Gait assessment rating score |
| GCS | Glasgow Coma Scale |
| GHRF | Growth hormone-releasing factor |
| GIFT | Gamete intrafallopian tube transfer |
| gm | gram |
| GRGH | Growth-releasing growth hormone |
| GRH | Gonadotropin-releasing hormone |
| GYN | Gynecology |
| H | |
| H2O | Water |
| HBV | Hepatitis B virus |
| hCG | Human chorionic gonadotropin |
| HCL | Hydrochloride |
| HCT | Hematocrit |
| HCT | Hydrochlorothiazide |
| HELP | Hawaii early learning profile | ...