Adult internal medicine · Dallas, Texas
Care that sees the whole you.
Comprehensive internal medicine with a focus on prevention, early detection, and clear plans for long-term health and wellness.
✓ Same-day visits available
✓ On-site lab services
Connected. Personal. Committed.
Your health is more than a chart.
By specializing in chronic and acute disease management, early detection and disease prevention as well as health promotion, our internal medicine team focuses on the total healthcare needs of adults. Conditions such as high blood pressure, heart disease and diabetes may show no symptoms, and early detection is often imperative for successful treatment.
We give you an in-depth evaluation and a clear explanation of your medical needs, then work with you to build a comprehensive plan that promotes wellness. Effective communication, patient education and preventive medicine are the cornerstones of our practice — we encourage you to ask questions.
Your peace of mind is just as important as your physical health.
— HealthCore Physicians Group
How we care for you
Care for today. A plan for tomorrow.
Preventive Care
Annual physicals, wellness exams, immunizations, and screenings to help you stay ahead of health concerns.
Wellness · Screenings · Vaccines
Chronic Care
Management of diabetes, high blood pressure, cholesterol, asthma, thyroid disorders, heart disease, and more.
Diabetes · Heart Health · Asthma
Acute Care
Treatment for illnesses and injuries, including colds, flu, infections, allergies, and minor injuries, since we don’t do MVA or work-related injuries
Sick Visits · Injuries · Flu
In-Office Services
On-site diagnostic testing — labs, EKG, DEXA bone density, and FibroScan liver screening.
Labs · EKG · DEXA · FibroScan
Your next step
A conversation is a good place to start.
Call our team to arrange an appointment and discuss the care you need.
Call our officeYour care team
Experienced physicians. One standard of care.
Andrew Phan, M.D.
Internal Medicine
Board Certified
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Dr. Phan is a board-certified internal medicine physician who earned his medical degree from the University of Texas Southwestern. He completed his internship and residency at Presbyterian Hospital in Dallas, where he served as chief resident in his final training year. He holds a Bachelor of Science degree, Cum Laude, from Southern Methodist University and is fluent in English and Vietnamese.
Susan McKinney, M.D.
Internal Medicine
Board Certified
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Dr. McKinney is a board-certified internal medicine physician who has been licensed in Texas since 1993 and has practiced with HealthCore Physicians Group since 1998. After receiving numerous honors through Baylor University’s Scholars Program, she earned her medical degree from the University of Texas Southwestern Medical School in Dallas. She completed her internal medicine internship at the Medical College of Virginia and her internal medicine residency at Presbyterian Hospital of Dallas.
Dr. McKinney’s professional experience includes Washington Hospital Center for Primary Care in Washington, D.C., and Primacare/Senior Medical Care Centers in Dallas. She is a member of the Texas Medical Association and the Dallas County Medical Society. Her peers have repeatedly recognized her as one of D Magazine’s top doctors.
Dr. McKinney brings an empathetic, patient-centered approach to adult primary care, helping patients prevent illness, manage chronic conditions, and address acute health concerns. She values the trust built through long-term relationships, listens closely, explains options clearly, and supports informed decisions that promote lasting well-being.
Shamim Khambati, M.D.
Internal Medicine
Board Certified
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Dr. Khambati is a board-certified internal medicine physician who obtained her medical degree from Grant Medical College & Sir J.J. Hospital in Mumbai, India. She completed her internship at UT Southwestern Medical School and affiliated institutions, then pursued postgraduate residency training in internal medicine at St. Paul Medical Center, where she served as Chief Resident. She has been affiliated with HealthCore Physicians Group since 2000.
Randall Wooley, M.D.
Internal Medicine
Board Certified
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Dr. Wooley specializes in internal medicine and holds board certification in that field. His educational background includes a bachelor’s degree in Biology from Centenary College of Louisiana and a medical degree from the University of Texas Southwestern Medical School. He is a Fellow of the American College of Physicians and has been repeatedly recognized as one of the top physicians in D Magazine.
Yili Wang, M.D.
Internal Medicine
Board Certified
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Dr. Yili Wang is a board-certified internal medicine physician who earned her undergraduate degree from Baylor University and completed medical school at Baylor College of Medicine in Houston, Texas. She trained in internal medicine at Presbyterian Hospital of Dallas and maintains active medical staff privileges at both Presbyterian Hospital of Dallas and Baylor Medical Center.
David Bennett Grinsfelder, M.D.
Internal Medicine
Board Certified
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Dr. Grinsfelder is a Dallas-native physician board certified in internal medicine. He earned his undergraduate degree from UT Austin and completed medical school at Texas Tech University. His postgraduate training includes a Master of Public Health from UT and an internal medicine residency at UT Southwestern, where he focused on weight loss research in primary care settings.
Jordan Shive Robbins, M.D.
Internal Medicine
Board Certified
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Dr. Robbins earned her medical degree from McGovern Medical School in Houston, Texas. She completed her internship and residency at Baylor University Medical Center in her hometown of Dallas, where she served as Chief Resident and received both Intern of the Year and Resident of the Year honors.
Advanced Practice Providers
Ximena Acosta, PA-C
Physician Assistant
Board Certified
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Ximena Acosta, PA-C, is a board-certified Physician Assistant dedicated to providing compassionate, patient-centered care. With more than 10 years of clinical experience, she partners with patients to promote preventive health, manage chronic conditions, and improve overall wellness. Ximena is committed to helping every patient feel heard, informed, and supported throughout their healthcare journey.
Winona Tzou, FNP-C
Family Nurse Practitioner
Board Certified
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Winona Tzou, FNP-C is a board-certified Family Nurse Practitioner dedicated to providing comprehensive, patient-centered primary care for adults. She joined HealthCore Physicians Group in 2024.
Winona earned her Bachelor of Science in Nursing from The University of Texas at Austin, followed by her Master of Science in Nursing from Texas Woman’s University. She is certified by the American Academy of Nurse Practitioners Certification Board.
Her approach to patient care emphasizes building strong partnerships through shared decision-making, patient education, and evidence-based care. She values preventive medicine and personalized treatment plans that empower patients to make informed decisions and support their long-term health and well-being. She is committed to providing compassionate care and helping individuals achieve their health goals.
Patient resources
Everything you need, right where you need it.
Patient Portal
Access your health information, communicate with our care team, and more through your secure eClinicalWorks portal.
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Plan your visit →Presbyterian Hospital Dallas
Conveniently located in North Dallas.
We are on the campus of Texas Health Presbyterian Hospital Dallas, at Walnut Hill Lane and Greenville Avenue.
Address
Professional Building 1
8210 Walnut Hill Lane, Suite 230
Dallas, Texas 75231
Office hours
Monday–Friday: 8:00am–5:00pm
Phones answered: 8:00am–4:00pm
Fax: 972-284-7001
Care starts with a conversation
Make time for your health.
Call our team to arrange your next appointment.