Jacqueline Petray, M.D. at Warren Clinic Internal Medicine is a trusted provider with over 35 years of experience in adult medicine. A graduate of the University of Arkansas for Medical Sciences and residency-trained at the University of Oklahoma, Dr. Petray is board-certified in Internal Medicine and known for her thorough, patient-centered approach. She treats a wide range of conditions including hypertension, diabetes, asthma, and more. Patients appreciate her clear communication, attention to detail, and dedication to long-term wellness. Reasons to see Dr. Petray: * Over 35 years of experience in adult primary care and chronic disease management * Affiliated with leading Tulsa hospitals and highly rated for patient satisfaction * Known for thorough evaluations, clear communication, and personalized care. Dr. Petray is highly rated in 5 conditions, according to our data. Her top areas of expertise are Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, Hypertension, and Glucocorticoid-Remediable Aldosteronism.

Dr. Micah Derby, D.O., is a board-certified primary care physician and an AAHIVS-certified HIV specialist. He provides expert care for individuals living with HIV and Hepatitis C, offering advanced prevention and treatment options such as PrEP (pre-exposure prophylaxis) and PEP (post-exposure prophylaxis). As both a primary care provider and HIV specialist in Tulsa , Dr. Derby delivers integrated, patient-centered care that ensures continuity and improves long-term health outcomes. His dual role allows patients to receive comprehensive medical support in one location, streamlining their healthcare experience. Dr. Derby also offers fast-tracked Hepatitis C treatment , helping patients avoid long waits for gastroenterology referrals. This approach enables quicker access to care and better health outcomes for those affected by Hepatitis C. Why Choose Dr. Derby? Expert HIV & Hepatitis C Care Personalized & Timely Treatment Plans for HIV, Hepatitis and other Chronic Conditions Focus on Preventive Care & Early Detection/Annual Wellness Visits Conveniently located in the Saint Francis Yale Campus Compassionate, Patient-Centered Approach. Dr. Derby is highly rated in 4 conditions, according to our data. His top areas of expertise are Myelitis, AIDS Dementia Complex, HIV/AIDS, AIDS Dysmorphic Syndrome, and Endoscopy.

Rakesh Prasad is a primary care provider, practicing in Internal Medicine in Oklahoma City, Oklahoma. Dr. Prasad is highly rated in 28 conditions, according to our data. His top areas of expertise are Osteoarthritis, Lung Metastases, End-Stage Renal Disease (ESRD), Endoscopy, and Gastrostomy.

John Ivanoff is an Internal Medicine provider in Tulsa,, Oklahoma. Dr. Ivanoff is highly rated in 23 conditions, according to our data. His top areas of expertise are Aortic Valve Stenosis, Arterial Embolism, Atherosclerosis, and Coronary Heart Disease.

Stanley Zimmerman is an Internal Medicine provider in Tulsa,, Oklahoma. Dr. Zimmerman is highly rated in 19 conditions, according to our data. His top areas of expertise are Necrosis, Carotid Artery Disease, Abdominal Aortic Aneurysm (AAA), Angina, and Endoscopy.

Mathew Good is an Internal Medicine provider in Tulsa, Oklahoma. Dr. Good is highly rated in 18 conditions, according to our data. His top areas of expertise are Mitral Valve Regurgitation, Necrosis, Carotid Artery Disease, and Aortic Regurgitation.

Ronald Brown is a primary care provider, practicing in Internal Medicine in Tulsa, Oklahoma. Dr. Brown is highly rated in 7 conditions, according to our data. His top areas of expertise are Peptic Ulcer, Necrosis, Cellulitis, and Type 2 Diabetes (T2D).

Joan Merrill is an Internal Medicine provider in Oklahoma City, Oklahoma. Dr. Merrill is highly rated in 4 conditions, according to our data. Her top areas of expertise are Systemic Lupus Erythematosus (SLE), Lupus Nephritis, Arthritis, and Cutaneous Lupus Erythematosus (CLE).

Shahan Stutes is an Internal Medicine provider in Norman, Oklahoma. Dr. Stutes is highly rated in 3 conditions, according to our data. His top areas of expertise are Grass Allergy, Allergic Rhinitis, Sinusitis, and Hives.

Amritanshu Singh, D.O. at Saint Francis Health System offers comprehensive, patient-focused care for adults of all ages. With board certification in Internal Medicine and years of experience treating a wide range of chronic and acute conditions, Dr. Singh is known for his attentive listening, thorough diagnostics, and commitment to long-term wellness. He practices at the Saint Francis Sleep Center. Whether you're managing diabetes, hypertension, or seeking preventive care, Dr. Singh provides personalized treatment plans grounded in the latest medical research. Highlights: * Board-certified internist with expertise in adult primary care and chronic disease management * Affiliated with leading Tulsa hospitals and praised for patient-centered care * Offers specialized services including sleep medicine evaluations and treatment. His top areas of expertise are Obstructive Sleep Apnea, Central Sleep Apnea, Drowsiness, and Excessive Daytime Sleepiness.

Teresa Hardesty, D.O. is an internal medicine physician at Warren Clinic in Tulsa, Oklahoma. With a focus on adult primary care, Dr. Hardesty provides personalized medical care tailored to each patient's unique needs, ensuring a healthier, happier life. Dr. Hardesty specializes in managing chronic conditions, preventive care, and diagnosing complex medical issues. Her patient-centered approach prioritizes building strong relationships and empowering patients to take control of their health. If you're looking for an experienced, caring physician in Tulsa, discover why patients trust Dr. Teresa Hardesty and Warren Clinic for their internal medicine needs. Her top areas of expertise are Chronic Cough, Familial Hypertension, Glucocorticoid-Remediable Aldosteronism, and Hypertension.

Board certified in internal medicine, Phillip Haddad, MD serves patients in Shawnee, Okla. and surrounding areas. He specializes in pulmonary disease, or disorders related to the lungs. Dr. Haddad is highly rated in 35 conditions, according to our data. His top areas of expertise are Lung Metastases, Chronic Obstructive Pulmonary Disease (COPD), Lung Nodules, and Asthma in Children.

Board certified in internal medicine and rheumatology, Omar Silvestre, MD, knew he wanted to be a doctor as a child. His patient care philosophy is a two-way street, where he listens intently to his patients? concerns and also provides them education for the best possible health outcomes. When not caring for patients, he likes to travel, spend time with his family and go for motorcycle rides. Dr. Silvestre is fluent in both English and Spanish. Dr. Silvestre is highly rated in 22 conditions, according to our data. His top areas of expertise are Rheumatoid Arthritis (RA), Undifferentiated Connective Tissue Disease (UCTD), Sjogren Syndrome, and Psoriatic Arthritis.

Tito Razdan is a primary care provider, practicing in Internal Medicine in Tulsa, Oklahoma. Dr. Razdan has been practicing medicine for over 37 years is highly rated in 15 conditions, according to our data. His top areas of expertise are Vertigo, Chronic Cough, Fainting, Hip Replacement, and Endoscopy.

Lam Le is a primary care provider, practicing in Internal Medicine in Tulsa, Oklahoma. Dr. Le has been practicing medicine for over 26 years is highly rated in 12 conditions, according to our data. Her top areas of expertise are Compartment Syndrome, Peptic Ulcer, Necrosis, and Cellulitis.

Steven Cummings is a primary care provider, practicing in Internal Medicine in Stillwater, Oklahoma. Dr. Cummings is highly rated in 54 conditions, according to our data. His top areas of expertise are Familial Hypertension, Hypertension, Glucocorticoid-Remediable Aldosteronism, Gastrostomy, and Hip Replacement.

If you're looking for a knowledgeable and approachable internal medicine physician in Tulsa, Dr. Benjamin Houston Greiner, D.O., M.P.H. at Warren Clinic Internal Medicine provides comprehensive care tailored to adult patients. Board-certified and trained at Oklahoma State University Center for Health Sciences, Dr. Greiner specializes in managing chronic conditions such as hypertension, diabetes, obesity, asthma, and seasonal allergies. With a reputation for clear communication and a patient-first approach, he helps individuals take control of their health through preventive care and evidence-based treatment. Board-certified internist with expertise in chronic disease management and preventive care Practices at Warren Clinic Tower in Tulsa—offering convenient access and coordinated services Highly rated for attentive listening, thorough evaluations, and clear medical explanations.

Skylar Turner, D.O. is a board-certified internal medicine physician who is passionate about providing comprehensive adult care. Dr. Turner is committed to helping patients manage chronic illnesses, promote wellness, and maintain a healthy lifestyle. Dr. Turner specializes in: Chronic disease management (diabetes, hypertension, etc.) Preventative care and health screenings Personalized treatment plans Wellness and lifestyle counseling At Warren Clinic, Dr. Turner believes in treating the whole person, offering compassionate, patient-centered care tailored to individual needs. Whether you need regular check-ups or management of complex conditions, Dr. Turner is here to guide you through every step of your healthcare journey.

Dr. Michael Hiebert, D.O., is a board-certified family medicine physician and an AAHIVS-certified HIV specialist proudly serving the Tulsa, Oklahoma community. He offers expert care for individuals living with HIV and Hepatitis C , including access to PrEP (pre-exposure prophylaxis) and PEP (post-exposure prophylaxis) for HIV prevention. As both a primary care doctor and HIV specialist , Dr. Hiebert provides a holistic, integrated care model that supports patients through every stage of their health journey. This dual expertise ensures continuity of care and a more personalized healthcare experience—all in one convenient location. Dr. Hiebert also offers accelerated Hepatitis C treatment without a long wait time for a gastroenterology referral, helping patients begin therapy sooner and achieve better health outcomes. Why Choose Dr. Hiebert? Specialized HIV & Hepatitis C Treatment with AAHIVS certification Timely, Personalized Care Plans for chronic conditions and preventive health Comprehensive Primary Care with a focus on long-term wellness Located at the Saint Francis Yale Campus in Tulsa for easy access Compassionate, Patient-Focused Approach to every visit.

If you're looking for a dedicated internal medicine physician in Tulsa, Dr. Kenneth Daniel Ostmo, D.O. at Warren Clinic Internal Medicine offers comprehensive, patient-centered care for adults of all ages. With board certification and training from Oklahoma State University Center for Health Sciences, Dr. Ostmo is known for his thorough evaluations, clear communication, and commitment to long-term wellness. He provides a full range of services—from preventive care and annual wellness visits to chronic disease management—tailored to each patient’s unique needs. Why choose Dr. Ostmo: Board-certified in Internal Medicine with advanced training from OSU Center for Health Sciences Practices at Warren Clinic Tower in Tulsa, offering convenient access and coordinated care Highly rated for patient satisfaction, clear communication, and personalized treatment plans.

Dr. Taryn Haney, D.O., is a board-certified family medicine physician and an AAHIVS-certified HIV care provider, proudly serving patients in Tulsa, Oklahoma. She specializes in the diagnosis, treatment, and prevention of HIV and Hepatitis C , offering advanced options like PrEP (pre-exposure prophylaxis) and PEP (post-exposure prophylaxis) to support sexual health and reduce transmission risk. As both a primary care doctor and HIV specialist , Dr. Haney delivers coordinated, whole-person care that supports long-term wellness. Her integrated approach allows patients to receive both routine and specialized care in one convenient setting, improving continuity and outcomes. Dr. Haney also provides streamlined Hepatitis C treatment without long waits for a referral to a gastroenterologist—helping patients begin treatment faster and with fewer barriers to care. Why Choose Dr. Haney? Certified HIV Specialist with AAHIVS credentials Comprehensive Primary & Preventive Care tailored to each patient’s needs Quick Access to Hepatitis C Treatment Conveniently Located at Saint Francis Yale Campus in Tulsa Compassionate, Inclusive, and Patient-Focused Care Philosophy.

Cristopher Schultz is an Internal Medicine provider in Enid, Oklahoma. Dr. Schultz is highly rated in 48 conditions, according to our data. His top areas of expertise are Menetrier Disease, Diverticular Disease, Gastroesophageal Reflux Disease (GERD), Gastrectomy, and Colonoscopy.

Jon Johnson is a primary care provider, practicing in Internal Medicine in Stillwater, Oklahoma. Dr. Johnson is highly rated in 38 conditions, according to our data. His top areas of expertise are Cirrhosis, Xanthoma, Familial Combined Hyperlipidemia, and Type 2 Diabetes (T2D).

Muneer Khan is an Internal Medicine provider in Oklahoma City, Oklahoma. Dr. Khan is highly rated in 38 conditions, according to our data. His top areas of expertise are Obesity in Children, Hypothyroidism, Type 2 Diabetes (T2D), and Multiple Endocrine Neoplasia Type 2.

Richard Brittingham is a primary care provider, practicing in Internal Medicine in Lawton, Oklahoma. Dr. Brittingham is highly rated in 37 conditions, according to our data. His top areas of expertise are Lung Metastases, Metabolic Syndrome, Cervical Myelopathy, and Chronic Obstructive Pulmonary Disease (COPD). Dr. Brittingham is currently accepting new patients.