Medical Providers

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Charles Childers, DO

Chief Medical Officer
1100 W. Reynosa Ave., De Leon, TX.

Elizabeth Vallejo, FNP

2100 Crockett Dr., Brownwood, TX.

Michael J. Cloy, PA

2100 Crockett Dr., Brownwood, TX.

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McKenna Caldera, FNP
135 River North Blvd., Stephenville, TX.
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Whitney Garland, MPAS, PAC
135 River North Blvd, Stephenville, TX.
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Tiffany Torres, FNP
1100 W. Reynosa Ave., De Leon, TX.
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Shelia Spears, FNP
2100 Crockett Dr., Brownwood TX.
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Rachel Byrnes, FNP
2100 Crockett Dr., Brownwood TX.
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Rogina Gosnell, AGACNP
2100 Crockett Dr., Brownwood, TX.
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Tammy McCullough, FNP
2100 Crockett Dr., Brownwood, TX.
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Roy Byrd, MD
2100 Crockett Dr., Brownwood, TX.
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Brenda Madera, FNP
1100 W. Reynosa Ave., De Leon, TX.
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Dental Providers

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Rami Koro, DDS
135 River North Blvd., Stephenville, TX.

Heidi Sawyer, RDH
135 River North Blvd., Stephenville, TX.

Behavioral Health Providers

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Misti Till, LPC
Behavioral Health Director
2100 Crockett Dr.,
Brownwood, TX.

Veronica Smith, LCDC
2100 Crockett Dr., Brownwood, TX.

Emma Hogan, LCSW
2100 Crockett Dr., Brownwood, TX.

Starsha Brown, LPC
1100 W. Reynosa Ave., De Leon, TX.

Melinda Rowland, PMHNP-BC
1100 W. Reynosa Ave. De Leon, TX.

Madeline Middleton, Ph.D.
2100 Crockett Dr. Brownwood, TX.

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This health center is a Health Center Program grantee under 42 U.S.C. 254b, and a deemed Public Health Service employee under 42 U.S.C. 233(g)-(n).

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With a strong belief in integrating mental health best practices into everyday life, Megan strives to help individuals cultivate balanced and fulfilling lives.
Megan offers trainings, individual therapy, and group therapy sessions, while also engaging in public speaking and educational initiatives to promote awareness and understanding of mental health topics.
She believes in personalized, client-centered care that honors individual needs and empowers clients to reach their full potential.
Megan Guidry is a dedicated and passionate professional with over 12 years of experience in counseling.
Megan Guidry, LPC-S
Behavioral Health Director
He currently resides on a small farm and enjoys spending time with his family, taking care of his animals and practicing photography. His moto is, life is a journey and we should all learn to enjoy the ride.
Rodney is a member of the National Board of Certified Counselors.
Rodney received his Bachelors of Arts in Criminal Justice in 1994 from Dallas Baptist University. and received his Masters in Counseling and his LPC in 2015.
After his criminal justice career Rodney was employed by MHMR in Tarrant County helping individuals with both IDD and Mental Health.
In 1984 he attended the Police Academy in Abilene and worked in the criminal justice field for twenty years.
Rodney is a native of the central Texas area.
Rodney Sikes, LPC
She is available to serve patients of all ages at the AccelHealth Clinic located at 2100 Crockett Dr., Brownwood, Texas.
“I have a passion and love for medicine and caring for others,” Tammy continues, “Even after many years of serving in this role, I still get very excited to learn new things.”
Tammy has worked with Brownwood Regional Medical Center (BRMC), BRMC-One Source Clinic, and Heart of Texas Internal Medicine.
In 2002, Tammy received her Master of Science in Nursing with Family Nurse Practitioner specialty from Patty Hanks Shelton school of Nursing (Hardin Simmons University).
Tammy graduated from Texas Tech University Health Sciences Center in 1997 with a BSN and an undergraduate degree in business.
Tammy has 17 years of work experience in both Family and Internal Medicine while serving as a Registered Nurse for 23 years.
Tammy McCullough, FNP
Veronica has trained in motivational interviewing and has experience in group therapy, life skills training, and relapse prevention.
She has been a team leader, building supervisor, and completed numerous training.
She worked 11 and a half years in a therapeutic community in different counseling roles.
After graduating with honors, she started her career with TDJC working as a counselor intern.
Veronica received her Associated in Applied Science in Chemical Dependency Counseling in May of 2011.
Veronica Smith is a Licensed Chemical Dependency Counselor, LCDC.
Veronica Smith, LCDC
Tiffany was born in Morgan Mill, Texas and has lived in DeLeon, Texas for 26 years.
She believes in the importance of lifestyle changes, including diet, exercise, stress management, and medication management, as needed.
Tiffany provides individual care to patients of all ages from birth to end of life. She strives to involve patients in their own treatment plans, believing in empowering people is what helps the individual make the changes necessary for their improved health.
Tiffany received her Bachelor of Science in Nursing from Tarleton State University in 2005. She went on to earn her Master’s in Nursing from the University of Texas at Arlington, graduating as a Nurse Practitioner in 2019.
Tiffany Torres, FNP
Stephanie is grateful to work with the friendly and experienced AccelHealth team and is accepting pediatric and adult patients.
She is passionate about Family Medicine and Women's Health with an emphasis on preventive care. Stephanie believes health is best managed by preventing conditions before they arise and will regularly remind patients about preventive screenings, review lab results in detail, and share helpful lifestyle modifications prior to prescribing medication.
Stephanie earned her Bachelor of Science in Biology from the University of Texas at Dallas and Master of Physician Assistant Studies from UT Southwestern Medical Center prior to becoming a board certified Physician Assistant.
Stephanie Powdar, FNP
Sheila brings 13 years of hospital experience in medical and cardiac surgery. Sheila is excited to join the medical professional team at AccelHealth and serve the Brown County community.
Sheila holds a National Certification through The American Academy of Nurse Practitioners. As a Nurse Practitioner, Sheila served over 3 years in Washington State and a year in Colorado.
Sheila holds a bachelors degree in Registered Nursing, a Master’s degree in Nursing Administration and Education through Hardin Simmons University in Abilene Texas.
Sheila Spears, FNP is a graduate from Simmons College in Boston MA where she received a Master of Science in Nursing.
Sheila Spears, FNP
We are the only medical health provider in De Leon providing access to a wide array of primary health care services including medical, dental, and behavioral health care for the entire family.
Cross Timbers Health Clinics, now AccelHealth, began providing services to the community in 1967 and was formally chartered in 1986.
AccelHealth has a very rich history in De Leon, Texas and surrounding communities.
Where
Medical services include: Primary Healthcare, Women’s Health, Family Planning, Immunization, Chronic Care, Laboratory Services and Hepatitis C Screening and Treatment. Along with Family Dental Care, AccelHealth offers Behavioral Health services including treatment for Addictions and Substance Use Disorders.
Our Medical and Behavioral Health clinic locations include De Leon, Brownwood and Stephenville. Dental services are provided at our Stephenville clinic.
During the past 54 years, AccelHealth has made significant progress in expanding access to care in Central Texas, particularly for those most in need.
When
We are an FTCA deemed Federally Qualified Health Center (FQHC), accredited through The Joint Commission for all services surveyed under the applicable manual(s) noted in the comprehensive Accreditation Manual for Ambulatory Health Care receiving the Gold Seal of Approval four times, as an Accountable Care Organization.
AccelHealth provides affordable health care for patients of all income levels through a sliding fee scale based on income as compared to Federal poverty guidelines.
Why
Brenda was born in Fort Worth, Texas and grew up in Gorman, Texas. She enjoys traveling with her husband and two children, trying new restaurants, horseback riding, reading, and spending time with friends and family.
Brenda strives to provide compassionate, evidence-based care to all of her patients and is especially passionate about whole body wellness and preventative care. She is a member of the American Nurses Association, Texas Nurses Association, and Texas Nurse Practitioners Association.
She received her Bachelor of Science in Nursing from Tarleton State University in 2017 then went on to earn her Master’s in Nursing from Angelo State University, graduating as a Nurse Practitioner in 2021. She is fluent in both English and Spanish.
Brenda Madera is an ANCC board certified Family Nurse Practitioner.
Brenda Madera, FNP
Dr. Britt is thrilled to be back in the area where she can add value with her long history of providing quality dentistry.
Growing up in Odessa, Texas along with family connections in Desdemona, Dr. Britt is familiar with this area and rural life. Her husband of 14 years is a local rancher, breeding cattle and exotic deer in May, Texas, where they permanently reside.
Dr. Shanna Britt graduated from Baylor College of Dentistry in 1999 and practiced for 22 years in San Antonio as a sole practitioner, bringing much experience to AccelHealth.
Shanna Britt, DDS
In 2015, he received his Doctor of Medicine from the University of Texas School of Medicine in San Antonio.
Dr. Byrd completed his residency training in Internal Medicine at the University of Texas Health Science Center in San Antonio in 2018.
He has been practicing medicine in Brownwood since 2018 as a hospitalist at Brownwood Regional Medical Center.
Dr. Byrd is board certified in Internal Medicine by the American Board of Internal Medicine.
He graduated in 2010 from the University of Texas at Austin, and spent the following year as a medical research assistant in the Department of Trauma Surgery at the University of Texas Health Science Center in San Antonio.
Dr. Roy Byrd is a native of Brownwood, TX and is a graduate of Brownwood High School.
Roy Byrd, MD
He graduated from Loma Linda university school of dentistry in California, and since then has completed numerous continuing education programs to refine his skills as a dentist.
Dr. Koro has provided services for patients in need, in the suburbs of Chicago, before moving to Dallas 2 years ago.
He is dedicated to evidence based practice combined with compassionate care.
In his spare time he loves to travel and spend time with his family.
He completed his dental education and practiced dentistry there before moving to the United States. Dr. Koro is a general, restorative, and cosmetic dentist.
Dr. Rami Koro is originally from Jordan, where he was born and raised.
Rami Koro, DDS
McKenna Caldera earned her Bachelor of Science degree in Nursing from Tarleton State University in 2016 and went on to achieve her Master of Science in Nursing with a Nurse Practitioner degree from Texas Woman’s University.

Her background is in women’s health. An 8-year career as a registered nurse has provided extensive experience in caring for her patients, ensuring they receive the highest quality of care.

“I am very excited and committed to providing exceptional and compassionate care to my patients and their families”. “Growing up in the Stephenville area, I am thrilled to give back to the community that has always been home.”

I am married with two beautiful children. You can be sure to find us outside playing with our animals, riding horses, or vacationing at the beach.

My dedication, combined with my local roots, allows me to connect deeply with my patients and provide personalized and evidence-based care that meets their unique needs.
McKenna Caldera, FNP
Lilian is married and has 3 children, ages 9, 3 and 1. She enjoys spending time with family on her free time.
She volunteered at the Red-Cross at Blanchfield Army Community hospital in Kentucky and at a diabetes screening clinic in Kenya.
Lilian is board certified by the American Nurses Credentialing Center (ANCC) as a Psychiatric-Mental Health Nurse Practitioner (Across the lifespan). She has received a controlled substance registration certificate (DEA) as well as MAT Waiver for medication assisted treatment of substance use disorders.
Lilian Bor is originally from Kenya, East Africa. She earned her Bachelor of Science in Nursing from University of Cincinnati in 2011. She later pursued graduate studies and earned a Master of Business Administration degree in Healthcare from University of Mary in 2016. Lilian received a Master of Science in Nursing from University of Texas at Arlington in 2021.
Lilian Bor, APRN, MBA, MSN, PMHNP-BC
With over 12 years of experience in mental health, I am a Board-Certified Psychiatric Mental Health Nurse Practitioner committed to providing compassionate and personalized care.

Prior to becoming a nurse, I worked in crisis intervention, which has given me valuable insight into the importance of early support and intervention.

Since becoming a nurse I have spent most of my time as an LVN and then RN working in hospice and long-term care. My goal is to create a safe, judgment-free space where patients can feel heard, understood, and empowered to take control of their mental health journey.

I believe in a holistic approach to treatment, focusing on both mental and emotional well-being to help my patients achieve meaningful, lasting improvements in their lives.

I am excited to join the team at Accel Health, where I can combine my passion for mental health with a dedicated group of professionals to positively impact and enrich the lives of our community.
Chandra Sikes, PMHNP
Rogina Gosnell, AGACNPRogina graduated from Texas Tech University of Health Sciences Center in 2020 with a degree focus on Adult Gerontology Acute Care Nurse Practitioner.

Her AGACNP scope of practice includes both inpatient and outpatient management of acutely ill adults, as well as management of chronically ill patients.

She is excited to serve as a Provider in her home community of Brown County and utilize her knowledge and skills to provide quality and compassionate care to her patients.
He is dedicated to evidence-based practice combined with compassionate care.
He is board certified by the National Commission of Certification of Physician Assistants and is a member of the Texas Academy of Physician Assistants.
While at Hardin-Simmons he participated in a medical mission trip in the Dominican Republic.
He is passionate about serving patients and having a positive impact on his community.
Ian received his Bachelor of Science from Hardin-Simmons University in 2017 and Master of Physician Assistant Studies from Hardin Simmons University in 2020.
Ian Patterson, PA-C
Dr. Childers is a US Navy Reserve Physician, serving since 05/1989.
He is Board Certified in Family Practice by the American Osteopathic Board of Family Physicians.
He has served 20 of those years with the Department of Veterans Affairs in Brownwood, Texas.
Dr. Childers is a Family Medicine Physician and comes to AccelHealth with over 31 years of experience.
Charles Childers, DO
Chief Medical Officer (CMO)
Dr. Madeline Middleton is a Licensed Psychologist (LP) and a Licensed Specialist in School Psychology (LSSP) dedicated to helping children, adolescents, and their families navigate psychological and behavioral challenges.
She earned her Ph.D. in School Psychology from Texas Woman’s University in 2023, where she gained extensive clinical experience in neuropsychological assessment, individual and group therapy, school-based interventions, and parent training for children with autism spectrum disorder and those with disruptive behavior disorders.
Dr. Middleton completed her APA-accredited internship at Cypress-Fairbanks Independent School District, followed by a post-doctoral residency at a private practice in Killeen, Texas, where she focused on comprehensive psychological evaluations for children and adolescents.
Specialties:
• Psychological evaluations for children and adolescents
• Autism Spectrum Disorder and disruptive behavior disorders
• Parent training and support
• School-based mental health services
Madeline Middleton, Ph.D, LSSP
Whitney is passionate about providing quality, compassionate care.
She is board certified by the National Commission of Certification of Physician Assistants and is a member of the Texas Academy of Physician Assistants.
While at Hardin Simmons she attended a medical mission trip in Peru.
She received her Bachelor of Science from Tarleton State University in 2013 and Master of Physician Assistant Studies from Hardin Simmons University in 2019.
Whitney Garland, PA-C, is a west Texas native but has been in the Stephenville area since 2010.
Whitney Garland, MPAS, PAC
Elizabeth is a sensitive and caring provider with exceptional bilingual (English and Spanish) communication skills.
Having more than 11 years of diverse experiences, especially in Nurse Practitioner, Elizabeth is currently affiliated with the Regional Employee Assistant Program in Brownwood Texas, serving as a Nurse Practitioner with Brown County Gastroenterology, and Pediatrics of Brownwood.
In 2009, Elizabeth graduated from Texas Tech as a nurse practitioner. She completed her Bachelor of Science in nursing degree at Texas Tech in 2006. Elizabeth is an Allied Health Member of the American College of Gastroenterology.
Elizabeth has served patients in Central Texas for over 17 Years in the medical field and 7 of those years as a nurse practitioner.
Elizabeth Vallejo, FNP
Dr. Tutt grew up in Central Texas, completed undergrad in East Texas, and medical school in North Texas, completing rural rotations all around the state.

She returns to the Lonestar State after 3 years of Family Medicine residency in The Cowboy State – Wyoming, where she learned how to care for the spectrum of life with limited resources while also pursuing new outdoor skills (from rock climbing to cross country skiing, to the right way to shovel a driveway after a 3-foot snowstorm).

Training in such a raw and gorgeous environment has made her a diversely qualified Primary Care Physician, well equipped for the range of rural and international communities she plans to spend her medical career in.

Emily is passionate about providing a safe space and seeing others learn and take charge of their health, particularly in mental health and substance use disorder.

She is excited to join AccelHealth and work alongside physicians who trained her in medical school.

Dr. Tutt sees all ages including prenatal patients for both preventative and chronic disease management.
Emily Tutt, DO
Michael serves as Board President on the Brownwood ISD Board of Trustees, and on Hardin Simmons University Physician Assistant Program Advisory Board as well as guest lecturing at the HSU PA program and as a clinical preceptor for PA students.
He is board certified by the National Commission of Certification of Physician Assistants and is a member of the Texas Academy of Physician Assistants.
His training and experience also include service as a hospital corpsman and respiratory care practitioner in the U. S. Navy, as well as extensive clinic work in internal medicine, diabetes care and cardiology.
Michael is a graduate of Brooke Army Medical Center Academy of Health Sciences, where he was certified as a Respiratory Care Specialist. He holds a bachelor’s degree in Physician Assistant Studies and a master’s degree in Physician Assistant Studies.
Michael J. Cloy, PA
Tom has a masters certificate in Global Health and has been involved in clinic development in Burundi (Africa) for a number of years. There he serves as a clinical consultant for The Cornerstone Clinic for The Cries of a Child and is passionate about disease prevention, malnutrition, and community health education.
Tom has practiced medicine in Brownwood since 1995 both in private practice and as a hospitalist where he served as the Director of Hospital Medicine at Brownwood Regional Medical Center.
He completed his residency in Internal Medicine at Baylor University Medical Center in Dallas where he was involved in clinical research.
He is a graduate of The University of Texas (Austin) and attended medical school at The University of Texas Health Science Center in San Antonio.
Dr. Byrd is a native of Brownwood and attended public school in Killeen, Texas.
Tom D. Byrd, MD
She is excited to provide care in her hometown of Brownwood, where she is deeply committed to addressing the behavioral health needs of the community. "I have been given a unique opportunity to make a lasting impact on the well-being of those I serve, and I am passionate about providing high-quality, compassionate care in rural and underserved communities."
She has extensive experience providing both individual and group therapy, specializing in Trauma-Focused Cognitive Behavioral Therapy (TFCBT), Cognitive Behavioral Therapy (CBT), and Motivational Interviewing (MI).
She has a Bachelor’s degree from Texas A&M University and Master of Social Work (MSW) from the University of Texas at Arlington, where she specialized in mental health and substance abuse.
Emma is a Licensed Clinical Social Worker (LCSW) with a deep passion for helping individuals overcome behavioral health challenges.
Emma Hogan, LCSW
Ms. Brown leverages her extensive background to provide individualized and group therapy, collaborating with multidisciplinary teams, and advocating for client well-being. Additionally, Starsha creates a supportive and non-judgmental environment that encourages growth, healing, and self-exploration.

Ms. Brown received a Bachelor of Science in Sociology with a Minor in Psychology and Master of Science in Counseling Psychology from Tarleton State University, Stephenville.
She has extensive experience providing both individual and group therapy, specializing in Trauma-Focused Cognitive Behavioral Therapy (TFCBT), Cognitive Behavioral Therapy (CBT), and Motivational Interviewing (MI).
Starsha comes with expertise in depression, anxiety, and trauma, and employs comprehensive evidence-based therapies, including Cognitive Behavioral Therapy (CBT) and Cognitive Processing Therapy (CPT), empowering clients to actively engage in their healing journey.
Starsha Brown is a Licensed Professional Counselor dedicated to helping individuals navigate life's challenges and achieve personal growth by exploring solutions that work for them.
Starsha Brown, LPC
Misti received her Master’s degree in Clinical Mental Health Counseling through Tarleton State University.
Additionally, Misti provides a compassionate, non-judgmental space for healing and self-discovery.
Misti utilizes evidence-based approaches such as Cognitive Therapy, Solution Focused Therapy, play therapy, and Humanistic Sand-tray Therapy to empower clients dealing with anxiety, depression, relationship, and other issues.
Misti Till is a Licensed Professional Counselor dedicated to helping individuals navigate life’s challenges and achieve personal growth.
Misti Till, LPC
She ensures an integrative approach to mental health, supporting individuals’ emotional and mental health through comprehensive care that improves lives.
Believing that "mental health is essential to overall well-being," Melinda is committed to helping individuals achieve balance, resilience, and recovery.
Her extensive background has shaped her approach to mental health, recognizing the deep interconnection between physical and mental well-being. Passionate about compassionate, patient-centered care, she strives to address the whole person—mind and body.
Melinda is a board-certified PMHNP with a Master's in Nursing from the University of South Alabama, bringing 19 years of experience in critical care nursing and respiratory therapy.
Melinda Rowland, PMHNP-BC