BSA Amarillo Diagnostic Clinic

BSA Amarillo Diagnostic Clinic has been offering quality healthcare to the Texas Panhandle for more than 50 years. Our highly-trained staff specializes in adult general and sub-specialty care. All BSA Amarillo Diagnostic Clinic physicians offer patients the highest quality care available and are board certified in their specialty.

Our expert staff is highly skilled in a wide range of specialties, including:

We offer treatments for a variety of diseases and disorders, including:

  • Abnormalities in the organs
  • Acute cold and flu
  • Arthritis, gout and lupus
  • Barrett's Esophagus
  • Brain, spinal cord and nervous system disorders
  • Diabetes
  • High blood pressure
  • Infections
  • Intestinal disorders
  • Respiratory disorders
  • Sleep disorders
  • Stroke and cardiac disease

Comprehensive Care for Women

At BSA Amarillo Diagnostic Clinic, HerCare offers a comprehensive assessment of the physical, mental, sexual, emotional, spiritual and social health of women. Diagnoses and treatment are based on the latest peer-reviewed research, publications and expert guidelines on women’s health.

HerCare offers patient consultations for:

  • Sexual health including sexual dysfunction
  • Perioperative risk assessment
  • Cardiovascular risk and prevention measures
  • Midlife hormone management therapy
  • Osteoporosis
  • Vulvar disease
  • Well-woman exams

Ensuring Safe Travels

BSA Amarillo Diagnostic Clinic’s travel clinic offers patients disease-prevention services for their travels out of the country. The clinic is supervised by Dr. Taylor Carlisle, a highly-trained infectious diseases physician who is trained in tropical medicine and public health.

The travel clinic offers services for:

  • Immunizations
  • Travel counseling
  • Post-travel health evaluations

It is recommended to have a physician consultation at least six weeks before leaving the country.


Effective November 30, 2022, Dr. Robert Walley will be closing his practice at BSA Amarillo Diagnostic Clinic. Patient records will remain with BSA Amarillo Diagnostic Clinic.

Effective December 31, 2022, Dr. Joanna Wilson is closing her practice at BSA Amarillo Diagnostic Clinic. Patient records will remain with BSA Amarillo Diagnostic Clinic. 


Daniel Beggs, M.D.

R. Todd Ellington, Jr., M.D.

James Lusby, M.D.

Haq Nawaz, M.D.

J. Taylor Carlisle, M.D.
Infectious Diseases

Holly Mitchell, M.D.
Internal Medicine

Adrian Pay, M.D.
Internal Medicine

Joanna Wilson, D.O.
Internal Medicine

Sean Milligan, M.D.

Javier Dieguez, M.D.
Critical Care, Pulmonology

Timothy Mooring, M.D.
Critical Care, Pulmonology

Robert Walley, DO
Critical Care, Pulmonology

Ming Chen, MD

Ali Hussein, MD

Carla Caballero, FNP
Gastroenterology, Family Nurse Practitioner

Misty Lance, MSN, APRN, FNP-C
Gastroenterology, Family Nurse Practitioner

Marilyn Miller, MSN-RN, FNP-C

Marilyn Miller, MSN-RN, FNP-C
Gastroenterology, Family Nurse Practitioner

Ashley Roberts, FNP-C
Gastroenterology, Family Nurse Practitioner

Alana Elmquist, GNP-C
Infectious Disease, Family Nurse Practitioner

Lindsey Criss, ACNP-C
Neurology, Family Nurse Practitioner

Tiffany Randle, FNP-C
Neurology, Family Nurse Practitioner

Kyla Beedy, FNP-C
Pulmonology, Sleep Medicine, Family Nurse Practitioner

Kayla M. Williamson, N.P.
Pulmonology, Sleep Medicine, Family Nurse Practitioner

Contact Information

6700 W. 9th Ave.
Amarillo , TX 79106
Phone: 806-358-0200


7:30 a.m. – 5:30 p.m.


7:30 a.m. – 12:00 p.m.