Meet our Staff
At Hamilton Vein Center, we truly believe in the teamwork approach. Through the course of your treatment, you will be seen by our doctors and our mid-level providers to ensure that you receive the best possible care. Our physicians and mid-levels truly work as a team and communicate extensively. They work closely with each other to discuss cases, diagnoses and treatments though your treatment is always supervised by the doctor. Our physician assistants are trained personally and thoroughly by Dr. Hamilton and our team of interventional radiologists.
Carlos R. Hamilton III – MD
Founder and Medical Director
Dr. Hamilton graduated Magna Cum Laude and Alpha Omega Alpha from the University of Texas Medical Branch in Galveston in 1994. Here, Dr. Hamilton was chief resident during his diagnostic radiology residency. He completed his Fellowship at University of Texas Southwestern Medical Center in Dallas, and then returned to Houston to practice in his hometown. Dr. Hamilton has been servicing the Houston community as both a diagnostic and interventional radiologist since 1999. He opened the Hamilton Institute, now Hamilton Vein Center, in Sugar Land in 2010.
Michael Di Iorio – MD, RPVI, RPhS
Dr. Di Iorio graduated from Rutgers University Robert Wood Johnson Medical School. After completing an internship in general surgery and a residency in radiology he went on to complete a fellowship in vascular & interventional radiology at Brown University. He is board certified by the American Board of Radiology and holds a Certificate of Added Qualification in Vascular & Interventional Radiology. Dr. Di Iorio achieved added certification in vein disease treatment becoming a Diplomate of the American Board of Venous & Lymphatic Medicine. An active member of the American College of Phlebology, Dr. Di Iorio is the Chair of the CME Education Development Committee and the co-creator of the college’s Case of the Month series. He was selected as a member of the inaugural class of the American College of Phlebology’s Leadership Academy. A father of three daughters, he enjoys spending time with his family, exercising and cooking.
William C. Fox – MD
A native Houstonian, Dr. Fox graduated from the University of Texas Medical Branch in Galveston in 2004. He completed his internship, residency and fellowship in Vascular and Interventional Radiology at the Medical College of Virginia in Richmond. Dr. Fox practiced for three years in Virginia with an appointment as Assistant Professor in the department of Interventional Radiology at the Medical College of Virginia where he served as IR Director of Resident and Fellow education. He has extensive experience in treating venous disease in Virginia through work with VCU Vein Care as well as being a cofounder of The Baird Vascular Institute.
Stefan Franciosa – DO, MBA
Before joining Hamilton Vein, Dr. Franciosa was Division Head of Interventional Radiology at Cooper University Hospital, a Level 1 Trauma Center. He received a Certificate of Added Qualification in Interventional Radiology in 2013 and completed his fellowship in Interventional Radiology at Thomas Jefferson University. Dr. Franciosa received his Masters in Business Administration from St. Joseph’s University as part of a dual degree program (DO/MBA), attending medical school during the day and business school at night. He is retired from the Air Force Reserves after achieving the rank of Major. In his free time, Dr. Franciosa enjoys golfing with his three sons and spending time with his family. Dr. Franciosa is excited to be part of a dedicated team and will lead the Austin clinic.
Eric Hardee – MD
Born and raised in southern Louisiana, Dr. Hardee graduated from Baylor College of Medicine. He completed his internship and radiology residency at Naval Medical Center in San Diego and spent nine years as a naval ofﬁcer. His fellowship was in Vascular and Interventional Radiology at Dotter Interventional Institute at Oregon Health Sciences University. Dr. Hardee has practiced interventional radiology in the Houston area for 11 years. He enjoys LSU and Saints football, spending time with family, cooking, ﬁtness/running, and skiing.
AJ Valenson – MD
Dr. Valenson, a Clear Lake native, graduated from Yale Medical School in New Haven, Connecticut, and completed a two-year internship in surgical training in Chicago before returning to Yale for a residency in radiology. Prior to this, he received his bachelor’s degree from the University of Houston. He is a native Spanish speaker and is happy to be returning to his hometown to practice medicine. His interests and activities include sports, the outdoors, and reading.
Tina – PA-C
Tina graduated with her bachelor’s of science degree from St. John’s University, New York in 2000. She earned her Physician Assistant certification through St. Vincent’s Catholic Medical Center, NY. She has worked in the fields of Gyn and infertility, general, vascular and breast surgery. Most recently, Tina spent five years at West Houston Medical Center as the quality manager for performance improvement. She joined the Hamilton Vein team in January 2014. Tina is fluent in Malayalam, an Indian language spoken primarily in Kerala. Our patients are always happy to see Tina.
Sarah – PA-C
Sarah graduated with a bachelor’s of science degree from Texas A&M University and earned a master’s degree in physician assistant studies from the Baylor College of Medicine. Sarah has been working at the Hamilton Vein Center since May 2012. Prior to that she worked at an internal medicine practice in Phoenix, Arizona.
Ellen – PA-C
Ellen graduated from the University of Texas at Austin with a bachelor’s of science degree in nutrition and went on to obtain her master’s degree in physician assistant studies at Baylor College of Medicine. Before joining Hamilton Vein Center, she worked in gastrointestinal oncology.
Meagan – PA-C
Meagan graduated from Oklahoma State University with a bachelor’s of science degree in nutrition and then went on to obtain her master’s degree in physician assistant studies at Baylor College of Medicine. Meagan worked in Surgical Oncology before joining Hamilton Vein Center.
Rachel – PA-C
Rachel graduated with a bachelor’s of science degree from the University of Florida and earned a master’s degree in physician assistant studies from the Medical University of South Carolina. Rachel has been working at Hamilton Vein Center since April 2013. Prior to joining HVC, she worked in plastic surgery.
Heather – RPA
Heather is a Radiologist Practitioner Assistant. She completed her undergraduate degree at the University of Texas. Upon graduation, Heather completed her Radiologist Practitioner Assistant training at Weber State University. With extensive experience in vein treatment, Heather was a welcome addition to the Hamilton Vein Center team in November of 2011.
Kristin – RA
Kristin is a Radiologist Assistant. Kristin completed her undergraduate education at Oregon Tech University and relocated to Houston in 1998. In 2007, she completed her Radiologist Practitioner Assistant training at Midwestern State University. Her positive attitude and attention to detail make her a wonderful addition to the Hamilton Vein Center team!
Lauren – PA-C
Lauren graduated with a Bachelors of Science in kinesiology and exercise science from Georgia Southern University. She earned her Master’s degree in surgical physician assistant studies from The University of Alabama at Birmingham. Upon graduating she worked in cardiothoracic and vascular surgery in Austin for six years before joining the Hamilton Vein team. Lauren works at Hamilton Vein Center Round Rock.
Jennifer practiced as an critical care RN for 9 years prior to becoming a PA and received her BS in Physician Assistant Studies from the University of Oklahoma in 1995. She has practiced the last 18 years in Cardiovascular Surgery both in Texas and Massachusetts. Jennifer works at Hamilton Vein Center Round Rock.
Chris – PA-C
Chris graduated with a bachelor of science in Nursing from Bradley University in Peoria, IL and practiced as a Critical Care RN for 10 years prior to becoming a PA. She went on to earn her BS in PA studies from Midwestern University, and her Master’s degree in Business Administration from Keller Graduate School in Chicago. For the last 16 years, Chris has practiced as a PA in Cardiovascular and Thoracic Surgery, and Neurointerventional Radiology. Chris joined the Hamilton Vein team in January 2014.
Laura – PA-C
Laura received her Bachelors of Science degree from James Madison University in 1997 and Masters of Science in Physician Assistant Studies from Seton Hall University in 2000. Prior to joining Hamilton Vein Center, Laura practiced in cardiothoracic and vascular surgery in Austin for 9 years. Before that, she practiced as a surgical physician assistant in the Washington, DC area. Laura is part of the Hamilton Vein Center Austin team.
Tawanna – RN
As a registered nurse, Tawanna brings 10 years of nursing experience to Hamilton Vein Center. Her calm personality combined with her experience help make patients feel relaxed during procedures.
Zohra – Lead Ultrasound Technologist
Zohra graduated from Virginia College of Austin-Associates of Applied Science in Diagnostic Medical Sonography, and worked in San Antonio for Peripheral Vascular Associates/Baptist Health System as well as 1960 Digital Imaging. She has been an ultrasound tech since 2007 and has been an integral part of the Hamilton Vein Center team since May 2012.
Huy – RVT
Huy graduated from Rush University in Chicago, Illinois with a bachelor’s of science degree in vascular ultrasound. Huy brings many years of experience in ultrasound. Before joining Hamilton Vein Center, he worked at another vein center and also at UTMB Galveston vascular lab.