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About Us

Our Team of Board Certified Providers.


Maria Bella Natividad, M.D.

Dr. Natividad received her medical degree from Brown University in Providence, Rhode Island in 1991. She completed her internal medicine residency at George Washington University Medical Center, in Washington, DC. Following training, she worked as an assistant professor at George Washington Medical Center in the Department of Emergency Medicine and Internal Medicine. In 1999, Dr. Natividad opened her private practice, Advent Health Group, P.C. in Arlington, Va. Dr. Natividad was born in the Philippines and speaks Tagalog and Spanish. Dr. Natividad is board certified in Internal Medicine and is a member of the American Board of Internal Medicine (ABIM). She brings with her a compassionate approach to patient care and focuses on preventive care. When she is not seeing patients, she is involved in her children’s educational and social lives. Dr. Natividad is married and has two children.




Chantelle S. Powell, PA-C

Ms. Chantelle Powell, PA-C is our board-certified physician assistant. She is a native of the Washington DC metro area. Ms. Powell completed her Bachelor of Arts degree in Biology at Rutgers University. She then attended Saint Louis University, where she received her Master of Medical Science in Physician Assistant studies.  After graduation, Chantelle ventured west to work for a primary care practice in El Paso, Texas providing comprehensive care.  Missing being close to her family, she returned and join the Advent Health Group, P.C. She cherishes her patient relationships, and what they ultimately teach her about life experiences.  When not at work, she enjoys spending time with family and friends.   She also enjoys cooking, thrifting, crafting, design, and movies.  Ms. Powell is married and has two children.




Lindsay Liwanag, FNP-BC

Ms. Lindsay Liwanag is a board-certified family nurse practitioner. She joins Advent Health Group, P.C. with several years of experience as a nurse practitioner in primary care and a registered nurse in hospital settings. Ms. Liwanag completed her B.S.N. at Georgetown University and then graduated from Marymount University with an M.S.N in family practice. 

She became interested in preventative health and family medicine while serving as a Peace Corps volunteer in Senegal. She enjoys building relationships and collaborating with her patients to help them lead genuinely healthy, happy lives. She is a native of the Washington DC area. In her spare time, she enjoys spending time with her husband, family, and friends. She also enjoys live music, cooking, hiking with the family dog, and exploring new and old places. 



Cheryl J. Jackson, CAPPM, CMSR

Cheryl J. Jackson, our practice consultant, has over forty years of medical practice management experience.  She and her team of committed patient success associates are here to serve you our patients.  We realize that a healthy culture within a practice is a manifestation of strong medical practice leadership.  Our success hinges on the care and management of our patients.  If at any time you need to speak with Ms. Jackson, please feel free to call her cell phone.  703.403.7392