Houston Executive Team

Guillermo Sanchez, M.D

Our physicals physician is Guillermo Sanchez, M.D. He is OGUK certified. He also does DOD, pre-employment, pre-deployment, expat, yearly, Executive, Norwegian offshore and Saudi Arabian physicals. Actually, almost any physical your company asks for can be done at Passport Health.
He comes to Passport Health Houston after a very long and successful practice in Smithville, Texas (located just east of Austin). Having completed medical school at the University of Mexico in Mexico City, Dr. Sanchez moved to Canada where he trained and completed his residency. He met his wife in Canada, and then proceeded to Texas to start both his family and his practice.
He is a very thorough and compassionate physician and we feel very lucky to have him here at Passport Health. You will too!

Deborah Medellin– Executive Director

Debbie Medellin started Passport Health in July of 2001.
Debbie started her medical career in East Texas as the Director of the Special Procedures and Cardiac Catheterization lab at St. Mary’s in Pt. Arthur, Texas. She then became the Director of Lymphangiography at M.D. Anderson Hospital Cancer Center in Houston, where she performed the surgical procedure of lymphangiography for many years. From 1978 to 2001, she had her own practice performing the procedure at many local hospitals. When the opportunity to participate in the Passport Health family came along, she enthusiastically jumped on board, recognizing the high quality of how pre-travel medicine is practiced within the Passport Health system. That Passport Health offers the latest and most up to date information, and the best client service is Debbie’s primary goal. Mrs. Medellin is a member of The International Society of Travel Medicine and holds a Certificate of Knowledge from the ISTM.

Ann Self Cegelski– Nurse Manager

Ann has been on board from day one with the Medellins to help start Passport Health. She has a long history of practice management. Training in Baltimore in the specialized field of pre-travel medicine, Ann quickly became a huge asset for Passport Health Houston. As Nurse Manager she is very much involved in maintaining the excellence for which Passport Health is well known. Ann was directly responsible for running the Anthrax clinic here in Houston for the CDC post 9-11 and was given the highest recommendation for her professionalism and compassion in dealing with the participants. Ann continues to exhibit excellence and knowledge in the field of pre-travel medicine. She is also a member of the International Society of Travel.

Stephanie Cinek – Travel Health Specialist

Stephanie has been with PPH Houston since 2009. She loves her job and you will be the happy recipient of that love if you are seen by her. Her patients sing her praises frequently! Very knowledgeable and full of information, she will get you ready for travel anywhere! You will meet Stephanie at the Sugar Land office and occasionally at the main office.

Kim Niemuth – Travel Health Specialist

Kim has been with us since 2010. A lovely and knowledgeable lady, she works usually at the main and North Beltway offices, but could pop up anywhere. She has lived overseas with her family while her husband worked in Papua New Guinea. She knows very well what’s involved in an overseas transfer for families with children.

Mary Power – Travel Health Specialist

Mary is a very welcome new addition to the PPH Houston family. She comes to us with 24 years of experience in Pre-Travel medicine. We are really happy to have found her! This lady can be found at the Greenway Plaza and main offices.

Dawn Donaldson – Travel Health Specialist

If you have an appointment at our Woodlands office, then Dawn will be getting you ready for your trip. Dawn started with Passport Health in 2001, and worked for many years until she took a break to spend more time with her very busy daughters. She is very active in The Girl Scouts and is a Board Member of the Emerald Circle committee and is very involved with the Alumni Committee. Dawn’s dream vacation is an African Safari! Who doesn’t want to do that? Thankfully she has returned, and now takes care of our Woodlands/Spring and other north Houston area clients. We’re glad to have her back, and you will be too!

Lisa Rogers – Travel Health Specialist

Lisa has been with PPH Houston since 2010. This sweet lady does a lot of mission traveling with recent missions in West Africa and South America. Lisa is our wild card, and you could find her at almost any of the offices. Lisa is very thorough and definitely will educate you well and have you ready to go for your next trip.

Veronica Potter – Certified Medical Assistant and Phlebotomist

Veronica came to PPH Houston in 2010 and quickly became indispensable! Wearing many hats, she keeps it all together, and keeps all of us in line. Veronica does boosters, helps the nurses at times with injections of the vaccine, and assists Dr. Sanchez with the physicals. If you come to the main office for blood work, she will be the one who very gently draws that blood.

Joyce Connor – Accounts Manager

Joyce started with PPH Houston in the first year of our existence. She keeps it all together in the back office, and is very wonderful to work with. Since everyone picks up the phone if the front office is on the line already, you may have this very lovely and cheerful lady answering your call. She’s been with us since 2003, and she knows a lot and can answer almost any question.