Nancye Sadler, NP
Family Physician
8859 Sudley Rd, Suite 101
Manassas, VA 20110
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132 providers
Availability last updated 09/01/2026
Nancye Sadler, NP
Family Physician
8859 Sudley Rd, Suite 101
Manassas, VA 20110
Dr. Dimitri Coupet, MD
Family Physician
14201 Laurel Park Drive
Suite 106
Laurel, MD 20707
Oluremi Akinlade, MD
Family Physician
14333 Laurel Bowie Road
Suite 311
Laurel, MD 20708
Mrs. Monica Lovins, is a Certified Adult Nurse Practitioner who has been in health care for the last 40 years, advancing her career as a registered nurse in the ICU, Educator in the ICU as well as teaching at Catholic University of America while attaining her master’s in science with a GPA of 3.89, from Felician University, Lodi, New Jersey. She has received multiple nursing award to include excellence and expertise in multiple nursing modalities.
Monica joined Gastro Center of Maryland in 2017 after many years at John’s Hospital Bayview in the Department of Surgery, Bariatric Department. Her mission to treat all gastrointestinal diseases and facilitate, best outcomes for patients who suffer from chronic gastrointestinal diseases.
When off Monica enjoys quilting as well as spending time with family and friends.
Monica Lovins, CRNP
Nurse Practitioner
3405 Olandwood Court
Suite 102
Olney, MD 20832
Priscilla Lobo is a board-certified Family Nurse Practitioner with a strong background in critical care nursing. She began her nursing career after earning a Bachelor of Science in Nursing from Louisiana State University Health Sciences Center. Her journey began in telemetry, where she built a strong foundation in patient care and cardiac monitoring. Seeking greater challenges, she transitioned to the intensive care unit, specializing in cardiology and neurology. During this time, she served as a charge nurse and preceptor, mentoring new nurses and leading her team in delivering high-quality patient care.
Her passion for advanced practice nursing led her to attain a Master of Science in Nursing from Walden University, where she became a member of Sigma Theta Tau, the International Honor Society of Nursing. As a Family Nurse Practitioner, she is committed to providing compassionate, evidence-based care and making a meaningful impact on her patients’ lives.
In her spare time, she enjoys traveling and hiking with her husband, two children, and their dog.
Priscilla Lobo
Nurse Practitioner
3405 Olandwood Court
Suite 102
Olney, MD 20832
John Watts Haresch, MD is a family medicine physician who joined the practice in 2024. He currently focuses on the care of older adults. He previously served as a Regional Medical Officer with the U.S. Department of State, operated a full-spectrum private practice, and has been medical director of organizations meeting the needs of underserved communities. He completed medical school and family medicine residency in the University of North Carolina system.
John Haresch, MD
Family Physician
12800 Middlebrook Road
Suite 204
Germantown, MD 20874
Abraham Mbangowah, MSN, FNP, is a compassionate family nurse practitioner with nearly 15 years of experience working with patients of all ages. He’s highly skilled in all areas of primary, urgent, and preventive care.
Abraham earned his associate's degree in general studies at Prince George’s Community College in Largo, Maryland. He received his bachelor’s degree in nursing at Coppin State University in Baltimore, Maryland, where he graduated cum laude and was a member of the Mary Mahoney Honors Society. Abraham received his master’s degree and family nurse practitioner training at Chamberlain University in Irving, Texas.
He’s a certified family nurse practitioner (FNP). Abraham specializes in general medicine and all areas of primary care, including the treatment of illnesses, diseases, and mental health conditions. He completes continuing education to provide the latest advances in medical care.
Abraham speaks English, French, and Creole. When he’s not working, he enjoys spending time with family and friends.
Abraham is passionate about caring for his patients and warmly welcomes them to Diversity Health Clinic LLC.
Abraham Mbangowah, NP
Nurse Practitioner
4 Executive Park Court
Germantown, MD 20874
Akukeng W. Mba, MSN, FNP, CFCS, is an experienced family nurse practitioner with 15 years of experience, including almost five experience as a foot care specialist. She’s highly skilled in exceeding the general and podiatry needs of patients aged 12 and older.
Akukeng received her bachelor’s and master’s degrees in nursing and family nurse practitioner credentials from Coppin State University in Baltimore, Maryland. She is a registered nurse and family nurse practitioner (FNP) who maintains her advanced medical credentials with continuing education.
Akukeng has worked in hospital and clinic settings. She has expertise in medication administration, nursing education, critical care medicine, healthcare management, advanced cardiac life support, and foot care. Akukeng specializes in routine foot assessments, diabetic foot exams, callus debridement, and managing conditions that affect the toenails.
Akukeng loves spending time with her friends and family when she’s not caring for patients. She welcomes new and existing patients to Diversity Health Clinic LLC and looks forward to improving their health and quality of life.
Akukeng Mba, Family and Psychiatr
Nurse Practitioner
4 Executive Park Court
Germantown, MD 20874
Dr. Ron Rakowski, a board-certified Emergency Medicine physician for more than 25 years, was born and raised in Northern New Jersey and received his undergraduate degree in Biology with honors from Harvard College. He graduated from University of Maryland School of Medicine in Baltimore, MD and completed his Emergency Medicine residency as an active duty USAF officer in the integrated program at Wright Patterson AFB / Wright State University in Dayton, OH. After achieving the rank of Major and completing his obligation to the USAF at The First Fighter Wing Hospital Langley AFB, he separated from the military and became a staff physician and director of the Emergency Department at Mary Immaculate Hospital in Newport News, VA. In 2001, following the birth of his third child, he and his family relocated to Maryland, where he became a staff physician at Frederick Memorial Hospital’s Emergency Department, eventually becoming its Vice Chairman and then Medical Director.
Dr. Rakowski left FMH after 13 years and since has held various appointments, including as an internal travel physician with TeamHealth (staff EM physician at St. Joseph’s in Syracuse, NY and staff EM physician and director at St. Joseph’s in Reading, PA), staff EM physician with Holy Cross Hospital (Germantown, MD), staff EM physician with UPMC (Susquehanna / Williamsport, PA), and staff EM physician with WellSpan (Gettysburg, PA and Good Samaritan in Lebanon, PA). When not in the ED, Dr. Rakowski has organized several medical mission trips to the Amazon basin in Peru and the mountain communities in Costa Rica.
He continues to reside in Maryland with his wife and two dogs. Dr. Rakowski looks forward to his involvement with RediCare Mobile Health Service and the impact the organization will have in keeping our communities at home, safe and healthy.
Ronald Rakowski, MD
Emergency Medicine Physician
12410 Milestone Center Drive
Ste 600
Germantown, MD 20876
Ms. Shannon Martin, FNP-C
Family Physician
3169 Braverton Street
Suite 102
Edgewater, MD 21037
Dr. Nancy Rivera, MD
Family Physician
20 Mayo Rd
Ste 201
Edgewater, MD 21037
Sultana Afrooz, DO, is a holistic and integrative medicine physician at Be The Change Health & Wellness, located in Columbia, Maryland. Dr. Afrooz specializes in diagnosing and treating highly complex health challenges confronting many patients and providing them with the in-depth, compassionate, and individualized care they deserve.
Dr. Afrooz has practiced osteopathic medicine since receiving her doctorate from Des Moines University – Osteopathic Medical Center in Des Moines, Iowa, in 2002. Her training included an osteopathic internship and family practice residency at the Frankford Hospital in Philadelphia, Pennsylvania. Dr. Afrooz was board certified in family practice from 2005 to 2014 and is currently board-eligible. She has successfully completed the National Board of Osteopathic Medical Examiners NBOME Part I, II, III Boards, the State Osteopathic Licensing Examination, and is licensed to practice medicine in Maryland, Pennsylvania, and Georgia.
Dr. Afrooz is committed to evaluating and treating the individual while improving their physical health and spiritual well-being. She is well-versed in testing and discovering environmental, genetic, and infectious factors connected to chronic health issues. Dr. Afrooz utilizes the best available integrative laboratory evaluations to get to the root cause of disease and help patients regain their health. Dr. Afrooz brings to her practice of medicine a history of continued excellence in her training and education, an intellectual curiosity that's motivated by compassion, and a life-long commitment to learning. Dr. Sultana Afrooz specializes in treating patients who have been chronically ill from the effects of tick-borne infection, mold toxicity, and environmental toxicity.
Dr. Afrooz uses an integrative approach to treatment using prescription antimicrobials, herbal supplements, and nutritional supplements. She has an exceptional knowledge of mind-body medicine, food as medicine, and other integrative functional approaches to health and healing. Dr. Afrooz is dedicated to helping her patients achieve wellness and healing in all aspects of their lives. She believes that the body has an inherent ability to heal itself and that it is her goal as a practitioner to guide patients in their journey to healing. Dr. Afrooz has had extensive training in the treatment of tick-borne infections and has attended annual ILADS conferences to keep up to date on the latest research and treatments in tick-borne infections and Multiple Infectious Disease Syndrome. With this training, she has become extremely involved in learning about the systemic effects of mold toxicity and treating the chronic systemic effects of mold illness. Dr. Afrooz has also spent years studying the various methods of persistence in chronic infections.
Dr. Sultana Afrooz, DO
Family Physician
10630 Little Patuxent Parkway
Suite 224
Columbia, MD 21044
Colleen Goode
Family Physician
517 Benfield Rd
Severna Park, MD 21146
Board Certified in Integrative & Holistic Medicine as well as Family Medicine, Certified Functional Medicine physician Dr. Calihan brings decades of experience to her work with patients, whom she helps achieve optimal health and wellness through a variety of techniques.
Dr. Calihan has spent many years studying and obtaining credentials in holistic, functional, and integrative medicine. Her practice has been awarded the Best of Loudoun prize for alternative medicine each year since 2007.
Dr. Calihan graduated from Smith College in Northampton, Massachusetts, before obtaining her medical degree from Georgetown University Medical School in Georgetown, Washington, DC.
Dr. Calihan trained and precepted at the Center for Mind-Body Medicine in Washington, DC, and she also trained in acupuncture with Dr. Joseph Helms at UCLA.
In 2000, Dr. Calihan earned her board-certification in Holistic Medicine, and in 2014 became a member of the first class of Certified Functional Medicine Physicians through the Institute of Functional Medicine.
Dr. Calihan was a founding owner and former medical director at Loudoun Medical Group, one of the largest multi-specialty physician practices in the mid-Atlantic region. She was also their Board Chair from 2000 to 2005.
Dr. Calihan specializes in the treatment of chronic, complex conditions, including autoimmune disease, thyroid and hormonal imbalances, biotoxin illness, chronic fatigue, and fibromyalgia. Using the Functional medicine approach, she searches for the cause of a condition and then works to help rebalance the system.
Visit Dr. Calihan for compassionate, comprehensive health care with a personal touch. She’s currently welcoming new patients.
Dr. Martha Calihan, MD
Family Physician
116-Q Edwards Ferry Rd NE
Leesburg, VA 20176