Skip to main content

Language(s) Spoken

English; Spanish

Joined Kelsey-Seybold

December 1997

Accepting New Patients?


​​​​​​Professional Background

Dr. Castillo graduated from Meharry Medical College in Nashville in 1981. He completed his residency at Oakwood Hospital in Dearborn, Michigan before completing a Master’s degree in Public Health and his residency in General Preventive Medicine at Loma Linda University in California. Dr. Castillo completed fellowship training in Occupational Medicine at West Virginia University, Morgantown.

Professional Organizations

Dr. Castillo is a member of the American College of Occupational and Environmental Medicine, American College of Preventive Medicine, American College of Lifestyle Medicine, Harris County Medical Society and the Texas Medical Association.

Hobbies and Interests

When he’s not caring for patients at Kelsey-Seybold Clinic, Dr. Castillo enjoys spending time with his wife and playing racquetball and baseball with his two sons.​​

​I would like every patient to have a positive, educational and motivational experience so that each person feels good about making positive lifestyle changes. Prevention and a healthy lifestyle are the two most important elements to health care.

Available Appointments with Xavier Castillo, MD

Visit Type :


​​​​​​​​​​Virtual Health

For the safety and protection of our patients and healthcare provider team, Virtual Visit options are available to all new and current patients.

Learn More​


Use your secure patient portal to book appointments online.
What is MyKelseyOnline?​

Log In

​​​​​​​​​​​​By Phone

Our Contact Center is here to serve you, 24 hours a day, 7 days a week.


Awards & Recognitions

​Appointments and Ce​​rtifications

Dr. Castillo has been certified by the United Kingdom Offshore Operators Association and is a certified Oil & Gas UK (OGUK) medical examiner.
He is also certified by the Association of Diving Contractors International and is a U.S. Department of Transportation (DOT) certified medical examiner for the Federal Motor Carrier Safety Administration (FMCSA).