Internal Medicine

Dr. Rodriguez, a Puerto Rican native, graduated from the College of Human Medicine, Michigan State University in 1991. She moved to San Antonio Texas to finish her Internal Medicine Residency at the University of Texas Health Science Center in 1994, and remained as Instructor of Medicine and still works as Clinical Assistant Professor for UTHCSA since 1996. She joined MacGregor Medical Association, and then went on to help found MacGregor Medical Center of San Antonio in 2000. She loves teaching medical students at different years in their training, and is a member of the Texas Medical Association, Bexar County Medical Society and the American College of Physicians. Her hobbies include gardening, traveling and running.

Family Practice

Dr. Vizcarra joined MacGregor in 2019 and we are so glad to have her!  Originally from Mexico, she attended medical school at the Universidad Autonoma of Coahuila in Torreon, Coahuila, Mexico, then completed her medical training in Philadelphia, Pennsylvania.  A residency in Family Medicine at Drexel University was followed by a fellowship in Geriatrics at Thomas Jefferson University.Dr. Vizcarra’s interest in education landed her a position with Texas Tech University Health Science Center Permian Basin Campus in Odessa, Texas. She started as an Assistant Professor, and directed a Family Medicine Residency program as well as a Geriatrics program, leading to an Associate Professor status before moving to San Antonio. In San Antonio, she began a solo practice and later joined a Palliative Medicine Program.Dr. Vizcarra loves primary and preventative care, with a passion for Geriatrics and addressing health disparities.  She is an active member of the Texas Association of Family Medicine, The Texas Medical Association, and the American Geriatrics Society, and is a Fellow of the American Association of Family Medicine.Her favorite hobbies are reading, traveling, and running.  She loves family gatherings and spending time with family and friends.

Internal Medicine

Dr. Rodriguez graduated in 1994 from Ponce School of Medicine where he was inducted into the Alpha Omega Alpha Honor Medical Society. He completed a residency in Internal Medicine at Washington University Medical Center in St. Louis, Missouri, and later became Board Certified in Internal Medicine. He moved to San Antonio in 1994 and became part of the MacGregor Medical family. He and his wife, a dentist, have three lovely children.He has special interests managing diabetic, obese and hypertensive patients as well as patients with allergic rhinitis.Dr. Rodriguez is fluent in Spanish and speaks some French and Italian. Dr. Rodriguez has been recognized as one of the best internists yearly in the San Antonio Magazine “Best Doctors”.

Internal Medicine

After graduating from Columbia University College of Physicians and Surgeons in New York, Dr. Oliver trained at a Columbia affiliate, St. Lukes-Roosevelt Hospital in Internal Medicine. He worked as a supervisory physician for Montefiore Medical Center in New York before and after voluntary service with the U.S. Air Force, and spent a great deal of time caring for patients with AIDS. His military career included a tour at Hellenikon Air Base in Athens, Greece. He moved to San Antonio in 1994 to practice with MacGregor Medical Association. He is board-certified by the American Board of Internal Medicine.

Family Practice

The University of Antioquia Medical School in Medellin, Colombia granted an M.D. degree to Dr. Roldan. He spent a year in an Infectious Disease research fellowship, then completed a residency at Baylor College of Medicine in Houston, including a stint as a Chief Resident. He followed with a fellowship in Palliative Care at the University of Texas Health Science Center – San Antonio. He is board certified by the American Board of Family Practice, and practices family medicine as well as palliative care.

Internal Medicine

Dr. Sanchez graduated from Central del Caribe University School of Medicine in Puerto Rico. He completed a residency in Internal Medicine at the University of Texas Health Science Center here in San Antonio prior to joining MacGregor Medical Association in 1994. He played a leading role in the establishment of MacGregor Medical Center of San Antonio in 2000, and became its first President. He is board certified by the National Board of Physicians and Surgeons. Married with two lovely daughters, he is fluent in Spanish as well as English.

Internal Medicine

Dr. Senger was born and raised in St. Louis (which will be evident on your first visit.) He met his wife at Baylor University. He went to medical school at St. Louis University School of Medicine, then quickly returned to Texas for his residency in Internal Medicine at the University of Texas Health Science Center at San Antonio. He was appointed to a year as Chief Resident. In 2005 he received an appoinment as a Clinical Associate Professor at the Health Science Center.

Texas Monthly recognized Dr. Senger as a “Super Doctor” and San Antonio Magazine has acknowledged him among San Antonio’s “Best Doctors” on an annual basis.

Family Practice

Dr. Smith was born and raised in northwest Houston. Dr. Smith attended the University of Houston from 1976 to 1980, when he graduated summa cum laude with a BS in biology. During his undergraduate studies he researched and published a paper on intestinal hormones as part of his senior honors thesis. Mark attended the University of Texas Health Science Center at San Antonio Medical School from 1980 to 1984, and completed his Family Medicine Residency in 1987 at the University Hospital System in San Antonio. After residency, Dr. Smith went into private practice in north-central San Antonio from 1987 to 1995. He expanded into a group practice on the northeast side of San Antonio from 1996 to 2000, and in January of 2000 joined nine other physicians to found MacGregor Medical Center – San Antonio. Dr. Smith is board certified by the American Board of Family Medicine. He has two children – Jordan and Jeremy. Mark enjoys basketball, soccer, hockey and spending time with his family.