Our Providers


Scott Freeman, M.D.

Scott grew up in Tucson, Arizona and attended The University of Arizona. “My interest in medicine began while working and living in West Africa where I witnessed the extraordinary need of the people there,” Scott explains. He chose The University of Arizona College of Medicine for medical school because it was in his hometown. Scott completed his residency at Mercy Family Practice Residency in Denver, Colorado because it was a small community hospital program in a great city.

Dr. Freeman’s special interests in medicine include sports medicine, diabetes and the prevention of cardiovascular disease. “I truly believe each patient has the power to influence their own health and with a partnership with their health car provider, they can optimize their own health,” Scott stated. Scott and his wife, Kelly, have a daughter, Kayla. He enjoys spending time with his friends and family, fine dining, cooking, running and spending time outdoors.


David Slater, MD, DABFP

David developed an interest in medicine because of an experience he had in college at Texas A&M. I really learned what kind of difference the right doctor can make for a patient, how he can help them to live a happier, healthier life.

David survived a skydiving accident and even had to learn to walk again, attending physical therapy for a couple of years. He then regained his full health and completed his degree in finance, but later returned to The University of Texas Southwestern at Dallas for his M.D. David has a special interest in men’s health, preventive medicine, and obesity and performs minor procedures in the office. He enjoys working with all patients, especially those who are interested in getting more out of life.

He is also an invited speaker at both the University of Texas Southwestern at Dallas and The University of Texas at Houston medical schools. David lives in the Las Colinas area and is married. He enjoys scuba diving, golf, rock climbing,and enjoys traveling to new countries.


Daniel Canchola, MD

Daniel  is a recent addition to the medical staff at TienaHealth. Dr. Canchola specializes in diabetes care, helping patients understand the disease and the value of diligence beyond medicine, including education, diet and exercise. He also specializes in minor outpatient surgical procedures.

Dr. Canchola graduated from the University of Texas Health Sciences Center at San Antonio School of Medicine and went on to complete his medical training at the John Peter Smith Family Practice Residency Program in Ft. Worth, Texas. Prior to joining TienaHealth, he worked at other clinics in the area, including the Las Colinas location of Diabetes America.

With a focus on disease prevention and preventive care, Dr. Canchola believes patient education is paramount. He emphasizes diet, exercise, goal setting and lifestyle management for all his patients. He recognizes the importance of developing an open and friendly relationship and chooses to talk with patients “person-to-person”, rather than doctor-to-patient. His practical philosophy complements TienaHealth’s mission to empower patients to take control of their health.

In his spare time, Dr. Canchola enjoys time with his wife and twin boys, weightlifting, and playing rhythm guitar in a rock band.


Michael Sullivan, MPAS, PA-C

Michael attended The University of Texas Southwestern Medical Center and additionally received his Master of Physician Assistant Studies. He joined TienaHealth because of the warm and compassionate people who share his philosophy of patient care. His philosophy includes patient-oriented care and interactive approaches. “Your body has wisdom, and if we listen to it, problems become obvious,” Michael stated.

Michael’s special interests in medicine include endocrinology, disease of the thyroid, and male and female hormone management. Michael explains his favorite experience as a provider as “sharing life experiences with many of my patients and their families, from birth through death. It means a lot to me to be allowed into my patients’ lives and to share the good and bad times.”

Michael’s special interests outside of medicine include doing home projects and playing the flute semi-professionally.


Tearani Williams, MD

Tearani Williams, MD joined TienaHealth because she believes a partnership between the physician and the patient is important for achieving optimum health and that prevention is the best way to add ‘years to your life and life to your years’. While many health problems can be identified early, most people do not seek treatment until the symptoms have become severe. This is why Dr. Williams has designed a practice focused on early detection and meticulous disease management.

Dr. Williams comes to TienaHealth from Pine Bluff, Arkansas, where she served as the Assistant Professor for Residency at the University of Arkansas for Medical Sciences and had a private practice. She is excited to be part of TienaHealth, and to being closer to her family.

With cardiovascular disease as the number one killer of women, Dr. Williams is focused on women’s health. She also believes good health starts early so she developed a unique approach for treating obese children in her family practice. Dr. Williams helps children control disease by empowering the entire family to live a healthy life together.


Jackie Decker, PA-C

Jackie Decker grew up first in Miami, FL and then a small town outside of Clinton, SC before attending Clemson University, where she received her bachelor’s degree in Language and International Trade/Spanish. From there she attended the Medical University of South Carolina in Charleston, where she earned her degree in Physician Assistant studies.

Jackie joined the TienaHealth family in November 2010 and is looking forward to providing excellent care to the folks in the Las Colinas area and beyond. Jackie has a passion for general preventative care, women’s health, and patient education. She feels that patient education truly empowers the patient to make necessary lifestyle changes to better their health.

She is recently married to her wonderful husband, Guy, and she enjoys spending time with family and friends, running, hiking, golf, and traveling.