Chicago Health Medical Group – Meet Our Team

At Chicago Health Medical Group, our doctors are united by a common goal: superior patient care. We provide our patients with the personalized care they deserve as well as the latest in medical advancements. Additionally, our doctors and staff are multi-lingual to address the needs of the diverse communities we serve.

Make a Virtual Appointment Now
Our doctors are now providing telemedicine services with virtual visits. Call your doctor’s office to learn more and request an appointment. If you need a physician, please call 844-533-CHMG.


Maria Olga Cardenas, M.D., M.S.C.I., provides a high level of clinical and academic expertise with an equally high level of understanding and respect. She is a Board Certified Endocrinologist specializing in treating endocrine issues such as diabetes, hormonal imbalances and thyroid disorders. Dr. Cardenas serves the Chicago area’s diverse communities and, in addition to English, speaks fluent Spanish.

Family Medicine

Guido Grasso-Knight, M.D., M.P.H., is certified by the American Board of Family Medicine. Dr. Grasso-Knight sees himself as a health advisor to his patients and enjoys caring for patients of all ages. He manages chronic diseases, acute illness and counsels patients in preventative health. Dr. Grasso-Knight believes in partnering with his patients to navigate their health care.
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Jacquelyn N. Skerrett, M.D., is certified by the American Board of Family Medicine. Dr. Skerrett has a history of providing exceptional patient care ranging from pediatric to geriatric populations. She approaches the care of her patients with dedication and compassion. Dr. Skerrett serves the Chicago area’s diverse communities and, in addition to English, is fluent in Spanish. Request an appointment


Isoken Koko, M.D., M.R.C.P., is a board-certified physician specializing in Hematology and Oncology. With over 27 years of international and domestic medical expertise, Dr. Koko is dedicated to bringing quality care to the community she serves. Professional affiliations throughout her career include the American Society of Hematology, the American Society of Clinical Oncology, the British Medical Association and the Nigerian Medical Association. Request an appointment

Nina Undevia Yedavalli, M.D., M.P.H., is board-certified in Oncology and Board Eligible in Hematology. She is the Medical Director of Hematology/Oncology at West Suburban Medical Center and is an Assistant Professor of Clinical Medicine at the University of Illinois at Chicago. Dr. Yedavalli’s multidisciplinary approach to medicine puts patients first by bringing together the best specialists and latest advancements to achieve the most positive results. Her passion for people and cultures goes beyond medicine, as evident by her fluency in the Spanish, Portuguese, Hindi and Gujarati languages. Request an appointment

Internal Medicine

Wendy Foster, M.D., is a board-certified physician specializing in Internal Medicine. Dr. Foster’s distinguished career is built on an unwavering commitment to advancing medicine. From her early days as a dentist, to providing personalized, attentive medical care today, Dr. Foster’s extensive history of pushing professional boundaries and expanding her knowledge base has kept her at the leading edge of medicine. Request an appointment

Samindi Gunasekara, M.D., is board-certified in Internal Medicine. Dr. Gunasekara believes that to provide the best care for her patients, she must take time to really understand their needs. She educates her patients about the importance of being an active partner in their health care decisions. This sets the stage to provide the best care, prevent complications and leads to good health outcomes.

Mary Schraugnagel, M.D., is board-certified in Internal Medicine. Dr. Schraufnagel provides personalized, expert care to address the unique needs of her patients. Throughout her career, she has been awarded numerous grants, academic accolades and teaching honors. Request an appointment


Scott Yen, M.D., is board-certified in Internal Medicine and is a Fellow of the American College of Physicians. Dr. Yen is an authority on evidence-based medicine, a discipline that applies clinical expertise and the best research to meet individual patient needs and preferences. It’s a delicate balance that leads to optimal outcomes and better overall quality of life when applied effectively. Dr. Yen has published and presented on evidence-based medicine and other subjects throughout his career. Request an appointment