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Internal Medicine

Internal Medicine

The internal medicine physicians – or internists – at UT Health East Texas Physicians are specialists highly trained to treat adult patients across the medical spectrum. Generally, they see patients who are age 18 and older, but that can vary by provider. They provide complete, compassionate care for adults, from helping patients maintain optimal health to diagnosing and treating complex medical conditions. They are dedicated to their patients’ mental and physical health, ensuring high-quality care.

The internists at UT Health East Texas Physicians look forward to offering you primary care that focuses on the specific needs and issues of adults. To schedule an appointment, call 903-531-8890.


Conditions we commonly treat include:

  • Acid reflux and GERD
  • Acne
  • AIDS and HIV
  • Alcohol and substance abuse
  • Allergies
  • Alzheimer’s disease and other dementias
  • Anemia
  • Angina
  • Anxiety
  • Arthritis
  • Attention deficit hyperactivity disorder (ADHD)
  • Asthma
  • Chronic obstructive pulmonary disease (COPD)
  • Celiac disease
  • Colds
  • Congestive heart failure
  • Cough
  • Crohn’s disease
  • Depression
  • Diabetes
  • Diabetic neuropathy
  • Eating disorders
  • Eczema
  • Endometriosis
  • Enlarged prostate
  • Erectile dysfunction
  • Fatigue
  • Fibromyalgia
  • Flu
  • Gout
  • Headaches
  • Heartburn
  • Heart disease
  • Hepatitis
  • High blood pressure
  • High cholesterol
  • Immunizations and vaccinations
  • Incontinence
  • Irritable bowel syndrome
  • Menopause and perimenopause
  • Metabolic syndrome
  • Osteoporosis
  • Overactive bladder
  • Parkinson’s disease
  • Pneumonia
  • Psoriasis
  • Respiratory infections
  • Shingles
  • Sinusitis
  • Stress
  • Stroke
  • Ulcerative colitis
  • Ulcers
  • Urinary tract infections (UTI)
  • Weight management

Service Providers

Amber Dawson, MD
Internal Medicine

Ellen Gastauer, ANP-C, APRN
Geriatrics (Aging), Internal Medicine

William R. Giles Jr., MD
Internal Medicine

Lisa J. Graves-Austin, MD
Internal Medicine

Natalie I. Johnson, MD
Internal Medicine

Wayne S. Karaki, MD
Internal Medicine, Diabetes Care

Rick Martinez, MD
Internal Medicine

Luke Range, ANP, APRN
Internal Medicine

Katie Root, MD, FACP
Internal Medicine, Weight Management

Stephen P. Rydzak, MD, FACP
Internal Medicine

Emad Shoukry, MD
Geriatrics (Aging), Internal Medicine

David J. Sloan, MD
Internal Medicine

Nghia D. Truong, MD
Internal Medicine

Sujatha Abraham White, MD

Sujatha Abraham White, MD
Internal Medicine

Karen Wies, MD, FACP
Internal Medicine