Who We Are

Nashville Leadership Team

Danielle Christian Gibson, M.D., MBA – Laboratory Medical Director
Dr. Gibson is the laboratory medical director for Covenant Pathology Services in Nashville. Dr. Gibson received her medical degree from South Alabama College of Medicine, where she was inducted as a member of Alpha Omega Alpha medical honor society. She completed her residency at the University of Arkansas for Medical Sciences in anatomic and clinical pathology (AP/CP) where she was Chief Resident of her program. She moved to Nashville for a Surgical Pathology fellowship with a Breast Pathology emphasis at Vanderbilt University Medical Center.


Roderic Bryson – Manager, Laboratory Services
Roderic was brought into the Covenant family in 2012 to assist the Vice President of Laboratory Services in developing and designing an Anatomic Pathology laboratory focusing on gastrointestinal pathology. Roderic has previously worked with well known organizations such as, Ameripath, PathGroup, and LabCorp as a Histology Technician and Immunohistochemistry Manager.


Robin Samanie-Dean – Field Service Representative
Robin Samanie-Dean - Field Service Representative Covenant PathologyRobin Samanie-Dean joined the Covenant team in October of 2015 as Field Service Representative. Robin graduated from Lafayette General School of Allied Heath Sciences Practical Nursing program in 1993. Since then she has been active in many aspects of health care including but not limited to clinical nursing, education, training, EMR and QM. Robin has vast experience with implementation and customer service.



South San Francisco Leadership Team

Maria Mercedes Patino, M.D., Ph.D. – Medical Director
A native of Medellin, Colombia, Dr. Patino received her Medical Degree at the Universidad Pontificia Bolivariana (UPB) continuing on to complete her Pathology residency at Stanford University Medical Center. Dr. Patino has been an instructor and invited lecturer at universities, such as, Universidad de Antioquia and UPB, Corporacion para Investigaciones Biologicas, and Colegio Mayor de Antioquia in Medellin, Colombia and the University of Illinois at Chicago. She is a Fellow member of the South Bay Society of Pathologist and American Society for Clinical Pathology.


Brigitte Robert – Manager, Laboratory Operations
Brigitte joined Covenant Pathology Services in 2013 as the Laboratory Operations Manager. She was one of the first employees hired for the laboratory in South San Francisco to build this laboratory from the ground up by overseeing the construction project, recruiting and training the new team members, installing and validating all new instruments to running the daily operations. Brigitte has a degree in Medical Technology. She worked as a bench tech and has extensive experience in laboratory management and process improvement. She has worked for organizations like Ameripath and Sutter Health prior to Covenant. She is also a member of ASCP, NSH and CSH.


Dan Phan, M.D., Ph.D 
Dr. Phan completed his Bachelor of Arts in Biology at the University of Texas at Austin. He then completed his medical degree from the University of Arkansas for Medical Sciences with honors in Clinical Research and fulfilled a doctorate degree specializing in Neurobiology and Developmental Sciences. Dr. Phan completed his residency in Anatomic and Clinical Pathology at the University of Arkansas for Medical Sciences as Chief Resident and continued to hone his skills with additional fellowship training in Surgical Pathology with an emphasis on Gastrointestinal Pathology at Cedars-Sinai Medical Center. While at Cedars-Sinai, he served as Chief Administrative Fellow. Dr. Phan has published multiple articles in peer-reviewed journals and has earned numerous honors, awards and grants.


Gazal Alsaati, M.D. 
After earning her medical degree from King Saud University in Saudi Arabia, Dr. Alsaati moved to the Unites States to join the anatomic and clinical pathology residency program at Georgetown University Hospital where she served as the chief resident. Dr. Alsaati then pursued a fellowship in  cytopathology at Georgetown University Hospital followed by a breast and gastrointestinal pathology fellowship at George Washington University Hospital. During her academic career, she published numerous papers in gastrointestinal pathology and cytopathology. Dr. Alsaati is a member of the American Medical Association, the United States and Canadian Academy of Pathology, and the American Society of Cytopathology.


Briana Gleason, M.D. 
Dr. Gleason graduated summa cum laude from Northwestern University as part of the Honors Program in Medical Education and earned her medical degree from Northwestern University School of Medicine, where she was inducted into the Alpha Omega Alpha honor society. She completed her anatomic pathology residency at Brigham and Women’s Hospital in 2007, followed by fellowship at the University of Arkansas for Medical Sciences. Prior to entering private practice, she was a staff pathologist at Massachusetts General Hospital. Dr. Gleason has published numerous peer-reviewed articles and co-authored a book chapter in a soft tissue pathology textbook.


Michele Collingham – Field Services Representative
Michele joined Covenant Pathology Services in July 2015 as the Field Service Representative. She has worked for over 20 years with several large healthcare groups established Nationwide. Her experience includes Clinical, Laboratory, Quality and Education. She specializes in system’s implementation, physician relations and customer care. She has studied at PCC and CCC in Oregon.