Meet Our Staff

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Vishweshwar Rao Ranga,
MD, Internal Medicine

Principle Investigator

Vishweshwar Rao Ranga, MD, is an accomplished medical professional who has amassed extensive clinical trial experience at Sierra Clinical Research. As Principal/Sub Investigator, he has played an integral role in numerous pivotal studies ...
across diverse therapeutic areas, including asthma, heart failure, liver diseases, and pulmonary conditions. Dr. Ranga has demonstrated his dedication to advancing medical knowledge through his involvement in Phase II and III trials, showcasing expertise in evaluating the efficacy and safety of various treatments. With a profound understanding of research protocols and a commitment to patient care, he continues to contribute significantly to the field of clinical research.

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Naresh Pratap Singh,
MD, Pulmonology

Principle Investigator

Dr. Naresh Pratap Singh, MD, stands as an accomplished medical professional with a remarkable career at Sierra Clinical Research and beyond. As Principal/Sub Investigator at Sierra Clinical Research, he has played a vital role in ...
advancing medical knowledge through his participation in a range of clinical trials, demonstrating expertise across diverse therapeutic areas. His commitment to research is matched by his extensive clinical experience, including his senior partnership at Pulmonary Associates, Inc., where he has contributed his medical acumen since 1991. Dr. Singh's notable contributions extend further as Medical Director at Kindred Hospital and Pulmonary Services at Health South Rehabilitation Hospital, showcasing his dedication to optimizing patient care in various capacities. With a proven track record as an educator and leader, his roles as Adjunct Assistant Professor at Touro University Nevada and Clinical Instructor at the University of Nevada School of Medicine highlight his commitment to shaping the next generation of medical professionals. Dr. Singh's comprehensive experience, combined with his academic and research contributions, make him a respected figure in the medical community.

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Vishvinder Sharma,
MD, Gastroenterology

Principle Investigator

Dr. Vishvinder Sharma, MD, is an esteemed medical professional whose contributions span both clinical practice and academic excellence. Serving as Principal Investigator at Sierra Clinical Research, Dr. Sharma has played a pivotal role in advancing ...
medical knowledge through his involvement in a diverse range of clinical trials. In addition to his research endeavors, he holds the position of Adjunct Clinical Assistant Professor of Medicine at UNLV Medical School, further demonstrating his dedication to education and shaping the next generation of medical practitioners. Dr. Sharma's expertise in gastroenterology is exemplified by his roles as a Gastroenterologist at Digest Associates LLP and as the Program Director for the Gastroenterology Fellowship at Valley Hospital and Medical Center. His commitment to academic and professional growth is evident through his adjunct faculty positions at Touro University Nevada and UNLV Medical School, where he imparts his knowledge to aspiring medical professionals. With a strong background in education, research, and clinical practice, Dr. Sharma's multidimensional contributions have made him a respected figure in the field of gastroenterology.

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Brian James Carlson,
MD, Gastroenterology

Principle Investigator

Dr. Brian James Carlson, MD, is a distinguished medical professional with a wealth of expertise in the field of gastroenterology. Serving as a Principal Investigator at Sierra Clinical Research, Dr. Carlson is dedicated to advancing medical knowledge through his involvement in... a diverse range of clinical trials. His commitment to education is evidenced by his role as the Associate Director of the Gastroenterology Fellowship Program at Valley Hospital Medical Center. As a Gastroenterologist at Digestive Associates, LLP, he contributes significantly to patient care and is esteemed for his role as GI Service Line Director at Sonora Regional Medical Center in California. Dr. Carlson's impressive educational background, including his Fellowship in Gastroenterology at U.C.I. Medical Center, and his extensive clinical experience highlight his passion for delivering exceptional medical care and contributing to the advancement of gastroenterological research.

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Dhiresh Joshi,
MD, Infectious Disease.

Principle Investigator

Director of Infectious Diseases for the Internal Medicine Residency Program at Valley Hospital. Dr. Joshi's commitment to education is further exemplified by his positions as a Clinical Assistant Professor at the University of Nevada School of Medicine and ...
Michigan State University School of Medicine. He has demonstrated leadership in various medical institutions, including his roles as Director of Infectious Disease at Kindred Hospital, Orthopedic Specialty Hospital of Nevada, Encompass Rehab Hospital, Horizon Specialty Hospital, and Clinic of Infectious Disease Specialist in Las Vegas. With a comprehensive educational background, board certifications, and numerous leadership positions, Dr. Joshi continues to make significant contributions to the field of infectious diseases and healthcare leadership.

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Maya Pudi,
MBS, CRC, Site Director

Site Director

Maya Pudi, MBS, CCRC, is an experienced professional in the field of clinical research site management. With a solid track record in managing research operations, Maya serves as the Site Director and Research Coordinator at Sierra Clinical Research in Las Vegas, Nevada. Her extensive ...
experience also includes leadership roles at Sherman Clinical Research in Texas as Site Director and lead clinical research coordinator. Maya previously was Site Director at Anderson Medical Research in South Carolina. Maya's early dedication to advancing medical knowledge is evident through her contributions as a Summer Research Assistant at Greenville Health System and a Research Assistant at Emory University Hospital Midtown. Maya also worked as a research assistant at Upstate Pharmaceutical Research in Greenville, South Carolina. Maya holds a Master's degree in Biomedical Science from The Commonwealth Medical College and a Bachelor's degree from New York University with a major in Biology and minors in Chemistry and Psychology. Maya has contributed to medical literature with publications such as a review on pain management for pancreatic head adenocarcinoma and a study on catheter-based renal arterial denervation. As a Certified Clinical Research Coordinator, she plays a pivotal role in facilitating clinical research and furthering scientific understanding.