2026 data ClinicalTrials.gov official source

Conditions: C

Compiled by PlainTrial · January 1, 2026

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

2,928 conditions starting with "C"

Showing 2,201–2,250 of 2,928

Condition	Trials	Recruiting
Complement-mediated Kidney Disease	1	1
Complementary Therapies	1	1
Complete DiGeorge Anomaly	2	1
Complete DiGeorge Syndrome	2	1
Complete Heart Block	1	-
Complete Response	2	-
Complex Abdominal Aortic Aneurysm	2	2
Complex Aneuploidy	1	1
Complex Aortic Aneurysms	2	2
Complex Atypical Endometrial Hyperplasia	1	1
Complex Cardiovascular Surgery With Cardiopulmonary Bypass	1	1
Complex Care	1	-
Complex Congenital Heart Defect	4	1
Complex Congenital Heart Disease	1	1
Complex Cryptoglandular Fistula	1	-
Complex Medical Patients	1	1
Complex Obstetric Surgery	1	1
Complex Partial Seizure	1	-
Complex Perianal Fistula	2	-
Complex Posttraumatic Stress Disorder	2	1
Complex Regional Pain Syndrome	4	2
Complex Regional Pain Syndrome (CRPS)	3	-
Complex Regional Pain Syndromes	8	7
Compliance	1	1
Compliance, Medication	1	1
Compliance, Patient	3	1
Complicated Diverticulitis	1	-
Complicated Intra-abdominal Infection	1	-
Complicated Intra-abdominal Infections	1	-
Complicated Intra-abdominal Infections (cIAI)	1	1
Complicated Urinary Tract Infection	2	1
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

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

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