| Abbreviation | Meaning |
|---|---|
| c | (c with a bar over it) with (from Latin cum) |
| C | cytosine cervical vertebrae |
| C1 | atlas – first cervical vertebra of the spine |
| C2 | axis – second cervical vertebra of the spine |
| C-section | cesarean section |
| CA | carcinoma cancer |
| Ca | calcium carcinoma cancer |
| CABG | coronary artery bypass graft surgery (pronounced "cabbage") |
| CABP | coronary artery bypass procedure |
| CAD | coronary artery disease |
| CADASIL | cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy |
| CAG | coronary artery graft coronary angiography |
| CAGS | coronary artery graft surgery |
| cAMP | cyclic adenosine monophosphate |
| CAH | chronic active hepatitis congenital adrenal hyperplasia |
| CALLA | common acute lymphocytic leukemia antigen |
| CAP | community acquired pneumonia |
| CAPD | continuous ambulatory peritoneal dialysis |
| CAO | conscious alert and oriented |
| CaOx | calcium oxalate |
| Caps | capsule |
| CAT / CT | computed axial tomography / computed tomography |
| Cath | catheter |
| CBC | complete blood count |
| CBC/DIFF | complete blood count/differential |
| CBD | common bile duct |
| CBE | clinical breast exam |
| CBS | chronic brain syndrome |
| CC cc |
cubic centimeter (use mL instead—see the do-not-use list) chief complaint cardiac catheter carbon copy |
| CCCU | critical coronary care unit |
| CCE C/C/E |
clubbing, cyanosis, and edema (general signs of cardiovascular disease) |
| CCF | congestive cardiac failure |
| CCK | cholecystokinin |
| CCK-PZ | cholecystokinin-pancreozymin |
| CCNS | Cell Cycle Non-Specific Drug. A type of medication used in chemotherapy. |
| CCP | cyclic citrullinated peptide |
| CCR | cardiocerebral resuscitation |
| CCU | coronary care unit critical care unit |
| CD | Crohn's disease |
| CDH | congenital dislocated hip |
| CDI | central diabetes insipidus |
| CDI | Clostridium difficile infection |
| CDMR | cesarean delivery on maternal request |
| CDP | cytosine diphosphate |
| CEA | carcinoembryonic antigen carotid endarterectomy cost-effectiveness analysis |
| CEIOL | Cataract extraction with intraocular lens placement |
| CF | cystic fibrosis |
| CFA | colonization factor antigen |
| CFIDS | chronic fatigue immune dysfunction syndrome |
| CFR | case fatality rate |
| CFS | chronic fatigue syndrome |
| CFTR | cystic fibrosis transmembrane conductance regulator |
| CFU | colony forming unit |
| CGD | chronic granulomatous disease |
| cGMP | cyclic guanosine monophosphate |
| CGN | chronic glomerulonephritis |
| CH | congenital hypothyroidism |
| CHD | chronic heart disease congenital heart disease coronary heart disease |
| ChE | cholinesterase |
| CHEM-7 | a group of blood tests, commonly called a basic metabolic panel (blood urea nitrogen, carbon dioxide, creatinine, glucose, serum chloride, serum potassium, serum sodium) |
| CHEM-20 | a group of blood tests (albumin, alkaline phosphatase, alanine transaminase, aspartate aminotransferase, blood urea nitrogen, calcium – serum, serum chloride, carbon dioxide, creatinine, direct bilirubin, gamma-glutamyl transpeptidase, glucose test, lactate dehydrogenase, phosphorus – serum, potassium test, serum sodium, total bilirubin, total cholesterol, total protein, uric acid) |
| CHE | cholinesterase |
| CHF | congestive heart failure |
| CHO | carbohydrate |
| CHOP | cyclophosphamide, doxorubicin (a.k.a. hydroxydaunorubicin), vincristine(a.k.a. Oncovin), prednisone (chemotherapy regimen) |
| Chol | cholesterol |
| CHS | cannulated hip screw |
| CHT | congenital hypothyroidism |
| CI | confidence interval cardiac index |
| CIB | cibus (food) |
| CICU | cardiac intensive care unit |
| CIDP | chronic inflammatory demyelinating polyneuropathy |
| CIN | cervical intraepithelial neoplasia |
| Circ | circumcision circulation |
| CIS | carcinoma in situ |
| CJD | Creutzfeldt-Jakob disease |
| CK | creatine kinase creatinine phosphokinase (formerly CPK) |
| CKD | chronic kidney disease |
| CKMB | MB isoenzyme of creatine kinase |
| CLARE | contact lens acute red eye |
| CLL | chronic lymphocytic leukemia |
| CM | Chirurgiae Magister, Master of Surgery (British and Commonwealth countries medical degree) |
| CM | Caucasian male |
| CMD | cystic medial degeneration |
| CME | continuing medical education |
| CML | chronic myelogenous leukemia, also called chronic myeloid leukaemia |
| CMML | chronic myelomonocytic leukemia |
| CMP | complete metabolic profile cytosine monophosphate |
| CMS | chronic mountain sickness |
| CMT | cervical motion tenderness |
| CMV | cytomegalovirus |
| CN | cranial nerves |
| CNS | central nervous system Crigler-Najjar syndrome |
| C/O | complains of... |
| CO | cardiac output carbon monoxide complains of... |
| COAD | chronic obstructive airways disease |
| COCP | combined oral contraceptive pill |
| COH | controlled ovarian hyperstimulation |
| COLD | chronic obstructive lung disease |
| Comp | compound |
| Conj | conjunctiva |
| COP | cryptogenic organizing pneumonitis |
| COPD | chronic obstructive pulmonary disease |
| CO2 | carbon dioxide |
| COX-1 | cyclooxygenase 1 |
| COX-2 | cyclooxygenase 2 |
| COX-3 | cyclooxygenase 3 |
| CP | cerebral palsy chest pain |
| CPAP | continuous positive airway pressure |
| CPC | clinical pathological conference |
| CPD | cephalopelvic disproportion |
| CPE | Clostridium perfringens enterotoxin |
| CPK | creatine phosphokinase |
| CPKMB | creatine phosphokinase heart |
| CPP | cerebral perfusion pressure |
| CPPD | calcium pyrophosphate |
| CPR | cardiopulmonary resuscitation |
| CPT | Current Procedural Terminology |
| CR | complete remission |
| Cr | creatinine |
| CrCl | creatinine clearance (Note: Looks similar to, but does not mean, the chromium chlorides—CrCl2, CrCl3, CrCl4) |
| Creat | creatinine |
| CREST | calcinosis, Raynaud esophagus, sclerosis, teleangiectasiae |
| CRF | chronic renal failure corticotropin-releasing factor |
| CrGN | crescentic glomerulonephritis |
| CRH | corticotropin-releasing hormone |
| CRI | chronic renal insufficiency |
| Crit | hematocrit |
| CRL | crown to rump length |
| CRP | C-reactive protein |
| CRS | congenital rubella syndrome |
| CRT | cardiac resynchronization therapy (artificial pacemaker) |
| CS | Caesarean section culture sensitivity Churg-Strauss syndrome |
| C/S | Caesarean section |
| C&S | culture and sensitivity (antibiogram) |
| C-spine | cervical spine |
| CsA | cyclosporin A |
| CSF | cerebrospinal fluid colony stimulating factor |
| CST | contraction stress test |
| CT | computed tomography cervico thoracic |
| CTA | clear to auscultation computed tomography angiography |
| CTAP | CT during arterial portography |
| CTO | chronic total occlusion |
| CTP | cytosine triphosphate cytidine triphosphate Child-Turcotte-Pugh score |
| CTPE | CT scan for pulmonary embolii |
| CTS | computed tomography scan Carpal Tunnel Syndrome |
| CTU | cancer treatment unit |
| CTX | ceftriaxone (a third-generation cephalosporin antibiotic) contractions |
| CUC | chronic ulcerative colitis |
| CV | cardiovascular |
| CVA | cerebrovascular accident costovertebral angle |
| CVAT | costovertebral angle tenderness |
| CVC | central venous catheter chronic venous congestion |
| CVD | cardiovascular disease |
| CVI | cerebrovascular incident |
| CVP | central venous pressure |
| CVS | chorionic villus sampling cardiovascular system |
| CVID | common variable immunodeficiency |
| c/w | consistent with |
| CWP | coal worker's pneumoconiosis |
| Cx | microbiological culture |
| Cx | cervix |
| CXR | chest x-ray |
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