Our Team
Investigators
Dr. Tarcisio Diaz, MD
Medical Director at NHRD
30+ Total Studies Completed from 2015 - present
Internist specializing in Endocrinology and Metabolism for 30+ years
Experienced Principal Investigator for 10+years
Robust practice with database of patients
Multiple hospital affiliations
Vast referral network
Nayna Paryani, NP
Nurse Practitioner for 23 years
Allergy, Asthma, and Endocrinology-experience
Industry-research experience as Sub-Investigator for 3+ years
Dr. Shankar Lakshman, MD
20+ clinical trials completed
Board-certified plastic and hand surgeon
Advanced training in burn and trauma surgery
Microvascular and reconstructive surgery specialist
Established Pasadena surgical practice
Research Team
Evelyn Cosca
Director of Operations
Don Cosca
Business Administrator
Princess Uy
Nurse Manager
Our study team has the following qualifications:
35+ years clinical research experience
Phase 1 to 4 studies
Dedicated resources for Business Development, Recruitment, and Regulatory = Accelerated Start-up!
Vendor Partners: Advarra IRB, CMB Laboratory
Investigators and study team have a solid track record of delivering complex studies
Local and Central IRB submissions, expedited start-up and closeout
Electronic Data Capture (EDC)
FDA-aligned protocols, thoroughly trained staff, and a disciplined operational approach ensure high-quality data and consistent execution across every study.
Quality You Can Trust
Participants feel informed, respected, and cared for which leads to stronger engagement, higher retention, and reliable outcomes for every trial.
Patient-First Retention
Operational Excellence
From screening to close-out, NHRD runs efficient, well-managed studies that sponsors can rely on.
Get Started
Advancing research starts with the right people and the right partners.
Whether you’re interested in participating in a study or looking for a reliable research site, connect with NHRD to take the next step.