Ready to Feel Great?
Doctors Clinic Amarillo delivers compassionate, personalized healthcare—combining modern medicine, prevention, and advanced treatments to help patients thrive in every stage of life.
Experts Who Truly Care
Dr. Gerald Parker is an osteopathic physician with over 38 years of experience in preventive medicine. Serving the Amarillo community with passion, Dr. Parker integrates both holistic and medicinal treatment options to care for adult patients of all ages. He earned his Doctorate of Osteopathic Medicine from Kirksville College of Osteopathic Medicine in Missouri and completed his internship at Art Centre Hospital in Detroit, Michigan. Licensed in Texas, New Mexico, and Nebraska, Dr. Parker also holds leadership roles such as President of the Southwest Academy of Preventive Medicine and Co-Director of the Southwest Institute of Preventive Medicine. With advanced training in stem cell therapy and memberships in organizations such as the American Academy of Anti-Aging Medicine and the American College of Regenerative Medicine, Dr. Parker is nationally recognized for his pioneering work in modern medical innovation. His expertise has even been featured on shows like The Today Show and That’s Incredible.
Gerald Parker, DO
Osteopathic Physician
Cassandra Whitney, FNP
Family Nurse Practitioner
With over 20 years at Doctors Clinic Amarillo, Cassandra Whitney, FNP, has become a trusted partner in patient care. She completed her undergraduate training at Texas Tech University and West Texas A&M University, followed by graduate studies at Western University of Health Sciences in Pomona, CA. Board certified through ANCC, Cassandra is an active member of organizations including the American Nurses Association, Texas Nurse Practitioners, and Sigma Theta Tau International. With specialized training in Prolotherapy and Regenerative Medicine, she provides comprehensive, advanced care while maintaining a warm, patient-centered approach.
Cassandra Whitney, FNP
Family Nurse Practitioner
Hear From Our Happy Patients
"Dr. Parker and the staff always make me feel welcome. They are all very knowledgeable."
"They were super sweet and respectful."
'Friendly staff, stayed on schedule, helped my husband regain his life, invested in saving his life! Excellent care!'
"It was informative and the staff were positive and polite"
"Great Experience"
"It was a very positive experience!"
"Everyone is courteous and professional. The oxygen therapy works wonders."
"Wonderful experience at this clinic. Spotless facility. Excellent, friendly Physician & Staff. Highly impressed."
"Need refill for medicine. Responded quickly. Thanks"
"Excellent on every level!"
"I love this “family group” of healthcare professionals! Everyone genuinely cares for their patients."
"I had great results from my visits to the Doctors Clinic."
Clinic Hours
Monday – 8:00 am to 3:00 pm
Tuesday – 8:00 am to 3:00 pm
Wednesday – 8:00 am to 6:00 pm
Thursday – 8:00 am to 3:00 pm
Friday – Closed
Saturday – Appointment Only
Sunday – Closed