2026 data ClinicalTrials.gov official source

Conditions: C

Compiled by PlainTrial, Clinical Trial Intelligence Editorial Process · January 1, 2026

Every condition beginning with C that has a registered US clinical trial, with how many studies cover each.

2,954 conditions starting with "C"

Showing 2,251–2,300 of 2,954

Condition	Trials	Recruiting
Complicated Urinary Tract Infection (cUTI)	1	-
Complicated Urinary Tract Infections	1	-
Complication	3	1
Complication of Anesthesia	1	-
Complication of Catheter	1	-
Complication of Diagnostic Procedure	1	-
Complication of Hemodialysis	1	-
Complication of Personal Oral Hygiene	1	-
Complication of Renal Dialysis	1	-
Complication of Surgical Procedure	1	-
Complication of Transplant	1	-
Complication of Urinary Catheter	1	-
Complications	1	-
Complications of Bariatric Procedures	1	-
Complications of Bone Marrow Transplant	1	-
Complications of Medical Care	1	-
Complications of Organ Transplant Stem Cells	1	-
Complications, Postoperative	1	1
Complications; Arthroplasty	3	1
Complications; Arthroplasty, Infection or Inflammation	1	-
Complications; Arthroplasty, Mechanical	1	1
Complications; Cesarean Section	2	-
Complications; Contraceptive	1	-
Complications; Device, Cardiac	1	1
Composite Lymphoma	1	-
Comprehension	2	1
Comprehensive Care	1	1
Compression	1	-
Compression Fracture	1	1
Compression Fracture of Vertebral Body	1	-
Compression of Spinal Nerve Root	1	-
Compulsive Behavior	2	-
Compulsive Hoarding	1	-
Compulsive Personality Disorder	1	1
Computational Modeling of Individual Metabolic Pathways	1	-
Computed Tomography	3	3
Computer + Fluency	1	-
Computer Aided Diagnosis	1	-
Computer Only	1	-
Computer-assisted, Evidence-based Psychosocial Intervention	1	-
COMT Gene Polymorphism	1	-
Concentration	1	1
Concentration Ability Impaired	1	1
Concentric Hypertrophy	1	1
Concept Mapping Versus Interviews	1	-
Conception	1	-
Concomitant VWD and Hemophilia	1	1
Concordance Between Colonoscopy Follow up Interval Noted in Patient Letters vs. Electronic Health Record Chart	1	-
Concussion	10	3
Concussion (Diagnosis)	1	-

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Data sourced from official public datasets. See our methodology for details.

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