Clinical Trials of Texas, Inc.

Center Information

Lele Simmons
Business Development Manager
Clinical Trials of Texas, Inc.
7940 Floyd Curl Dr. Suite 700
San Antonio, TX 78229

Currently Enrolling Trials

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Therapeutic Areas

Family Medicine
Healthy Volunteers
Infections and Infectious Diseases
Internal Medicine
Nutrition and Weight Loss
Obstetrics/Gynecology (Women’s Health)

Performance Metrics

Number of Studies Conducted: 700+
Number of Active Patients in the Database: 35000
EDC Capabilities: Yes

Staff Certifications
Number of Certified CRCs: 10
Number of Certified PIs: 1

ACRP Certifications
Number of ACRP Certified CRCs: 10


Clinical Trials of Texas, Inc. ( is one of the fastest-growing in the U.S. As a Phase I-IV, multi-therapeutic site, CTT is able to partner with pharmaceutical, device and biotech companies – as well as CROS – to provide high-quality data and provide exceptional enrollment results. CTT utilizes its strategically located central site in the San Antonio medical area -- in addition to its alignment with more than 25 local doctors – to provide site solutions for sponsors.

Some of the features of the CTT site include:

  • Early Phase Unit
  • Protocol and operations consultancy
  • Regulatory compliance
  • Patient recruitment and retention
  • Professionally managed call center
  • Archiving/maintenance of study documents
  • In-house Quality Assurance Manager


Clinical Trials of Texas, Inc. (, founded in 2001 by Kay Scroggins, RN, CCRC, has experience conducting Phase 1-IV inpatient and outpatient trials across multiple therapeutic areas.

CTT’s primary therapeutic areas include the following:

  • Diabetes
  • Women’s Health
  • Dermatology
  • Large Cohort Healthy Populations Including Vaccines and Assays
  • CNS

CTT has partnered with pharmaceutical, device and biotech companies of all sizes, from major pharma to smaller biotech firms.


CTT has more than 24,000 sq. feet of inpatient and outpatient facilities in the heart of the medical area. We work with more than 25 local physicians. CTT is unique in that it has QA-CAPA and dedicated regulatory, recruitment, business development and marketing departments.


Dr. Douglas Denham

Dr. Harry Croft

Dr. Douglas Denham, Medical Director of CTT, has conducted more than 500 trials over the past years and specializes in diabetes, metabolic disorders and fatty liver.

Dr. Harry Croft, Chief of CNS Research, has more than 30 years of research experience, and is a nationally renowned expert on PTSD.


CEO/President, Kay Scroggins, RN, CCRC - 20+ years

Site Director, Leisel Koerber, BBA, CCRC - 10+ years

Sr. Vice President of Early Phase Services and Strategic Development, Clayton Dehn - 10+ years


Clinical Trials of Texas, Inc. ( coordinates recruitment through a variety of channels, including its own robust database which is professionally managed by a CTMS, investigator patient bases, advertising, social media, community and media outreach.

Contact Center

If you are interested in contacting this center to discuss clinical trials, please complete and send the email form below. A representative from the research center will then follow up with you.