Olayiwola Ayodeji, M.D., MPH, FACP

Director of Clinical Research


Dr. Ayodeji has been practicing Nephrology on the Peninsula since 1995. He has led the development of The Clinical Trials Program at Peninsula Kidney Associates and served as a Principal Investigator on many research trials. Dr. Ayodeji presently...

Dr. Ayodeji has a Master’s degree in Public Health and is currently the director of our Clinical Research Program.

Lei Chen, M.D.


Dr. Chen joined Peninsula Kidney Associates in 2017; he currently practices at our Williamsburg office. He began an Internal Medicine Residency at East Tennessee State University in 2010 as he missed working with patients directly as a physician....

Dr. Chen joined Peninsula Kidney Associates in 2017; he currently practices at our Williamsburg office.

Hoang-Hai Nguyen

Transplant Nephrologist


Dr. Nguyen joined Peninsula Kidney Associates in 2009. As a transplant nephrologist, he specializes in pre and postoperative transplant care. Dr. Nguyen also treats patients at Sentara CarePlex, Sentra Williamsburg Regional and Mary Immaculate hos...

Dr. Nguyen is a trained transplant nephrologist. His special interest is managing the care of patients before and after transplantation.

Merfake Semret, M.D.

Hypertension and Kidney Disease Management


Dr. Semret joined Peninsula Kidney Associates in 2011. He specializes in the management of hypertension and kidney disease. He currently practices in both our Hampton and Williamsburg locations. Prior to his arrival, Dr. Semret served as an Instr...

Dr. Semret practices in both our Hampton and Williamsburg locations. He specializes in the management of hypertension and kidney disease.

Joanne Siu, M.D.

Ultrasonography


Dr. Siu has been practicing Nephrology on the Peninsula since 2003. She presently serves as the Medical Director of DaVita Peninsula Dialysis Center. She works closely with the Clinical Trials Program at Peninsula Kidney Associates and served as ...

Dr. Siu specializes in the detection of kidney related diseases through ultrasonography.

Shuping Wang, M.D.

Medical Director - DaVita Williamsburg Dialysis Center


Dr. Wang has practiced nephrology in the Williamsburg area since 2005. She has a special passion for geriatric care and specializes in the management of chronic kidney disease, hypertension and kidney related anemia and bone disease. She is fluent...

Dr. Wang is one of few nephrologists in the Williamsburg area. She takes pride in her impeccable reputation with fellow physicians and patients in the area.

Jessica Willis MSN, FNP-BC

Nephrologist & Internal Medicine


Jessica Willis, a board-certified family nurse practitioner and native of the Jersey Shore has actively been providing care in Internal Medicine and Nephrology for over 5 years. Prior to joining Peninsula Kidney Associates, Jessica served locally...

Jessica is a board-certified family nurse practitioner and has actively been providing care in Internal Medicine and Nephrology for over 5 years.

Yolanda Brooks

Adult/Gerontology Nurse Practitioner


Yolanda Brooks is a certified adult/gerontology nurse practitioner and native to Hampton Roads, she has been actively caring for patients since 2010 as a Registered Nurse and more recently Nurse Practitioner. Prior to joining PKA Yolanda worked...

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