
The Medical Vein Clinic Story
We want our patients to feel relaxed and cared for.
People tell us that our clinic seems more like a spa than a medical clinic. That is by design. We want our patients to feel relaxed and cared for. Our medical team has some of the most experienced vein specialists in the country. We have invested in the latest technology and equipment to treat vein disease. And, our clinic’s support staff is friendly, knowledgeable and treats every patient like family.


In the News
Understanding vein and lymphatic diseases and the risk factors associated with them
Vein and lymphatic diseas can lead to many issues in the body

Our Doctors
Founder, Medical Vein Clinic | Board-Certified Radiologist
John Hogg, MD, DABR, DABVLM, RPVI, RPhS, RVT, RVS
Dr. Hogg was inspired to open Medical Vein Clinic when he saw so many people with leg pain, swelling, and vein disease that too often went undiagnosed. Visiting a major hospital one day, the hospital’s administrator asked his opinion on what could be preventing a skin ulcer on her leg from healing. It was the size of an avocado and previous treatments had failed. The administrator had already consulted a cardiologist, an internist, and every department head at the hospital, yet they were unable to pinpoint the cause. Dr. Hogg immediately recognized the wound was caused by the lack of oxygen to her legs due to varicose veins. When the head of a hospital couldn’t get a proper diagnosis and treatment, he realized that ‘his calling’ was in opening Medical Vein Clinic to help thousands of others suffering needlessly.
He took a winding road to becoming a doctor. His first undergraduate degree was in accounting and finance (he passed the CPA exam) from Baylor University. Graduating, he worked in an accounting firm in Dallas, but noticed his friends in medical school had much more interesting jobs. He started volunteering in a surgical ICU unit at Parkland Hospital in there and loved it so much that he returned to college for his premed course at SMU with much determination and focus. Dr. Hogg received his medical degree from Baylor College of Medicine in Houston and did his residency in diagnostic radiology at Emory University in Atlanta.
This small-town Texas native made a name for himself in Gilmer (two hours east of Dallas), as the tall, skinny guy who ate more sweet potato pie, faster, than others twice his size at the annual Yamboree’s contest. Dr. Hogg has loved helping people since he was a young man, attaining the highest rank in Boy Scouts, Eagle Scout, and volunteering throughout college and beyond.
When he’s not in the clinic, you can find Dr. Hogg with his hands in the dirt in his garden, nurturing palm trees and orchids which he brings to the clinic to share with patients and staff. You might spot him driving around town with his three Vizsla's (red Hungarian Hunting dogs), joyfully hanging out of his truck’s windows.
Board-Certified Radiologist
Josue Medina, MD, DABR, DABVLM, RPVI, RVT
This El Paso native, decorated Navy veteran, and vein health specialist has been at Medical Vein Clinic since it opened in 2017. He loves working with patients to give them the freedom to walk pain-free, feel good, and participate more in life. Unlike other areas of medicine where physicians are often only able to manage symptoms, the clinic’s vein treatments and tools help patients experience a greater quality of life which is very rewarding for Dr. Medina.
His path to being a physician started when he was a Navy hospital corpsman (medic). It was then he realized he wanted to be a doctor and, thanks to the GI Bill, after 5.5 years of Naval service, he started his medical career journey. Dr. Medina received his bachelor’s degree in biochemistry from Texas A&M, and his medical degree was from Texas Tech Health Science Center School of Medicine in Lubbock. He completed his internship in El Paso followed by four years as a diagnostic radiology resident at the University of Tennessee.
Dr. Medina is happily married to his first girlfriend---they met when they were both serving in the military. When he left the Navy for college, they parted. But 14 years and many life chapters later, they reconnected on Facebook and married in 2011. Outside of the clinic, Dr. Medina enjoys learning about nutrition, working out, and playing video games. He’s also a big Formula 1 fan---Belgian-Dutch F1 Red Bull driver Max Verstappen is his favorite. On his bucket list? He dreams of hanging out in the F1 Paddock Club’s pit lanes one day.
Certified Vascular Surgeon
Thomas J. Gianis, II, MD, RPVI
Dr. Gianis is a Board-Certified Vascular Surgeon at Medical Vein Clinic who brings great experience, professional recognition, and research to this role. He received his undergraduate degree from Vanderbilt University and his medical degree from Ross University School of Medicine. Dr. Gianis’s surgical training includes a general surgery internship at Vanderbilt University, a surgical residency at Memorial University Medical Center in Savannah, Georgia, and a fellowship in vascular and endovascular surgery at the University of Virginia Medical School.
At Medical Vein Clinic, he thrives on evaluating, treating patients, and improving their vein and leg health. This New Jersey native is happy to make San Antonio home now, noting the people, weather, and Southern hospitality. When he’s not at work, he enjoys spending time with his wife and four young kids, golfing, fishing, skiing, and reading historical fiction. He’s also a die-hard University of Alabama and NY Jets football fan who doesn’t miss a game. Dr. Gianis’s golden retriever, Cooper, is a testament to his fandom level, named after Alabama wide receiver and now NFL standout, Amari Cooper.
Doctor of Physical Therapy, Lymphedema Specialist and
Registered Vascular Technologist
Joshua Trock, DPT, RVT, CLT-LANA
Dr. Trock complements the clinic’s varicose vein treatment experts, extending their services to care for patients suffering from lymphatic disease. Edema (swelling) caused by varicose veins or venous insufficiency is the leading cause of lymphedema. In addition to being LANA certified in Lymphedema Therapy as a Doctor of Physical Therapy, Dr. Trock is also a Registered Vascular Technologist (RVT). He is dedicated to evaluating and educating patients along with developing home treatment plans to resolve vein pain and swelling associated with vein disease. He also provides specialty counseling and treatment for those suffering from lymphedema. Dr. Trock received his bachelors and doctorate degrees in physical therapy from UT Health San Antonio and has applied his lymphatic disease knowledge to patient care for more than a decade. He is a subject matter expert and speaks nationally on the topics of lymphatic disease and lymphedema.
Nurse Practitioner
Jonathan Sidle, DNP, APRN, FNP-C
DNP Sidle is a member of MVC’s leadership team, brings more than a decade of treating patients for vascular disease and other chronic conditions. Successful vein disease management can positively impact many aspects of a patient’s health and this mission aligns with DNP Sidle’s passion for preventative medicine. At the clinic, DNP Jonathan evaluates patients, develops treatment plans and follows their progress back to health.
“In my previous years as a RN in hospitals and then as a DNP in primary care, I saw a lot of people with leg pain, ulcers, and swelling. But often they, as well as their health care practitioners, didn’t seem to understand what was going on. What drew me to MVC is the opportunity to improve someone’s quality of life. We have these sophisticated ultrasound machines and the expertise to diagnose and provide solutions.”
DNP Jonathan earned both his Doctor of Nursing and RN-BSN degrees from UIW. Originally from Ohio, he and his wife enjoy raising their three kids in San Antonio and attending church. Fun fact: He’s also an expert coffee roaster and has favorite methods for brewing a great cup. This java connoisseur’s go-to bean? Ethiopian, straight up.
Nurse Practitioner
Mary Jane Avila, MSN, APRN, FNP-C
Mary Jane Avila has joined the leadership team at Medical Vein Clinic as a Nurse Practitioner. She brings more than two decades of clinical experience to this role where she evaluates, diagnoses, and monitors patients before and after treatments. Avila was drawn to Medical Vein Clinic for their passion and dedication to educating and treating clients. “When patients understand their diagnoses, it increases their compliance and they have better health results,” she shared.
Growing up, Mary Jane wanted to be a physician but pursuing that was very expensive in her native Philippines. So, she altered her goals. She received a nursing degree and a Master of Health Professions in Education from the University of Santo Tomas in the Philippines. And, in 2024, she became an accredited Family Nurse Practitioner, earning her Master of Science in Nursing from Walden University in Minneapolis, MN.
Mary Jane is happily married and has two girls who, she will proudly tell you, are in the gifted and talented programs at their school. When she is not in the clinic, she gets joy from simple hikes in the mountains and as the go-to party decorator for friends and families. “I love it when guests are stunned. I like being of service in that way.”













TIP
Is your sleep disrupted by restless legs?
It could be Restless Leg Syndrome (RLS)! Recognize the signs: irresistible leg urges, tingling sensations, leg twitching, worsening issues at night, restlessness, and fatigue. Don't ignore—RLS might signal an underlying vein disease.

TIP
Did you know that varicose veins affect more women than men?
Studies show that about 55% of women and 45% of men suffer from varicose veins which can lead to deep vein thrombosis, blood clots, edemas and more. It's not just about appearance – varicose veins can lead to discomfort. If you're looking for relief, we’re here to help!
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Give us a call today to book your appointment.


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Our Offices
18831 Meisner Drive
San Antonio, Texas 78258
5742 W. Loop 1604 N.
San Antonio, TX 78251
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Office Hours
Monday - Thursday
8 am to 5 pm
Friday 8 am to 12 pm
Friday
8 am to 12 pm