Our Providers

Lacy Patterson, D.M.D.

Family Dentist

Dr. Patterson grew up in Waco, Texas. She received her undergraduate degree in Biomedical Science at Texas A&M University. She then went on to complete her dental degree at Arizona School of Dentistry and Oral Health. After completing dental school, she returned to Texas to complete a residency in advanced education in general dentistry at Baylor College of Dentistry. She is a member of the American Dental Association (ADA), Texas Dental Association (TDA), and North Texas Dental Society. Dr. Patterson is certified for child-friendly First Dental Home.

Dr. Patterson is a proud mom to Lucky Boone, her golden retriever, and a proud aunt to Duckie and Henry, her fur niece and nephew. She enjoys morning coffee, running, baking, fishing, being outdoors, and spending time with her loved ones. She is actively involved with the Golden Retriever Rescue of North Texas.

Dr. Patterson is excited to continue her work with community health centers and to improve the oral health of the McKinney community.

Kristi Karrington, D.M.D.

Family Dentist

Dr. Karrington received her bachelor’s degree from Texas A&M University and went on to complete her dental degree at Arizona School of Dentistry & Oral Health. She returned home to Texas where she completed an advanced education in General Dentistry residency at Baylor College of Dentistry. She is a member of the American Dental Association (ADA), Texas Dental Association (TDA), and North Texas Dental Society. Dr. Karrington is certified for child-friendly First Dental Home.

Dr. Karrington is actively involved with the Golden Retriever Rescue of North Texas. She and her husband have two tots together – Henry a twelve year old Bichon and Duckie a Boykin Spaniel bird dog. She enjoys traveling, running, fishing, and being outdoors with her husband.

Brock Pierce, M.D.

OB/GYN Physician

Brock Pierce, M.D. graduated with his Bachelor of Art from Southwestern University in Georgetown, Texas where he graduated Cum Laude. He earned his Medical Doctorate from the University of Texas Medical School in San Antonio, Texas, and is now pursuing a Masters of Counseling from Southern Methodist University in Plano, Texas.  Dr. Pierce has over 15 years of experience as an OB/GYN Physician. He has experience in evaluating, managing and delivering infants of high-risk obstetric patients. He has earned awards including Physician Electronic Health Record Champion and Outstanding Resident and Teaching Award.

Larry Pierce, M.D.

OB/GYN Physician

Bruce Rajala, D.O.

OB/GYN Physician

Bruce Rajala, D.O., an OB/GYN Physician at Women’s Health Center of McKinney, followed his father’s dream of being a Physician. After graduating with honors from Lake Forest College he continued his medical studies at the Prestigious Chicago College of Osteopathic Medicine. Upon graduation he was named Outstanding Graduate in the fields of Obstetrics and Gynecology.

 Dr. Rajala entered the U.S. Army immediately to begin a four-year internship and residency in his chosen fields of Obstetrics and Gynecology. His assignment to Brooke Army Medical Center at Fort Sam Houston led him to Texas.

 During his career Dr. Rajala has written, published and presented information in professional journals and meetings.

 Dr. Rajala is a Board-Certified Physician by the American Board of Obstetrics and Gynecology. He is also a Fellow of the American College of Obstetrics and Gynecologist.

Megan Thibodeaux, M.D.

OB/GYN Physician

Born in Lafayette, LA and raised in Baton Rouge, LA Dr. Thibodeaux graduated from Louisiana State University with an undergraduate degree in Nutritional Sciences and minor in Biology. She then pursued her medical degree from Louisiana State University School of Medicine in New Orleans, LA. Dr. Thibodeaux returned home to Baton Rouge to complete her residency training with Louisiana State University School of Medicine where she served as Administrative Chief Resident in her final year. At graduation, she received The Golden Award for recognition as an Outstanding Resident. She chose the field of Obstetrics and Gynecology because of her passion for women’s health. Dr. Thibodeaux believes that strong, healthy women lead to healthy families which are important for our community. She enjoys the continuity of care she is able to deliver throughout a womans life. She understands her role as a counselor and educator in the intimate relationship between a female and her OBGYN. She always strives for excellence in the care given to each patient. In her free time, Dr. Thibodeaux enjoys spending time with her fiancé and sons Carter, Noah and Grant. She is from South Louisiana, and loves her Creole/Cajun culture. 

Akosua Norgbey, F.N.P.-C.

Board Certified Family Nurse Practitioner

Akosua Norgbey, FNP-C, a family nurse practitioner, received her Bachelor of Science in Nursing with honors from the University of Akron in Ohio.  She went on to complete her Master of Science in Nursing from the University of Cincinnati. She is a member of Sigma Theta Tau International Honors Society of Nursing. As a board-certified Family Nurse Practitioner, Akosua Norgbey is experienced in caring for all ages across the lifespan from newborn to the elderly. Akosua provides patient-centered healthcare services, including well child pediatric and adult visits, sick visits, management of chronic illnesses and women’s health. In her leisure time, Akosua Norgbey loves to cook and enjoys traveling with her family.

Bryana Lange, CPNP-PC

Pediatric Nurse Practitioner

Bryana Lange is a CPNP-PC who grew up in Wichita Falls, TX. She graduated with her Bachelor of Science in Nursing from Midwestern State University in 2015 and completed her Master of Science in Nursing from the University of Texas at Arlington in August of 2020. She has 9 years of Emergency Room experience as an RN and has 3 years of NP experience as a Pediatric Nurse Practitioner. In her free time, she enjoys spending time with her family or friends, going hiking or traveling to different parts of the world.

Greg Smith, CPNP-PC

Pediatric Nurse Practitioner

Greg graduated with his MSN-Pediatrics from Maryville University of St. Louis in 2018 and graduated with his BSN from Texas Tech University Health Science Center in 2014. He is passionate about promoting health and wellness of children in our community.

Greg is married and has a loving son and daughters. In his free time, he enjoys spending time with family.

Keyla Sanchez-Mederos, PA-C

Physician Assistant

Keyla is a bilingual healthcare provider. She earned her bachelor’s degree in Neuroscience, graduating Magna Cum Laude from the University of Nebraska at Omaha. Following her passion for patient care, she completed her master’s degree in physician assistant studies from the renowned University of Nebraska Medical Center.

Originally from Venezuela, she values and appreciates diversity, allowing her to connect with patients from various backgrounds. Being fluent in both English and Spanish enables her to provide comprehensive care to a wide range of individuals.

Outside of work, her family is her priority. She loves spending quality time with her two kids, her supportive husband, and their lovable goldendoodle. She enjoys hiking, being outdoors, and traveling which brings her a sense of fulfillment and joy.

Alisha McCullough, D.N.P., C.N.M., A.P.R.N.

Nurse Midwife