Stephanie Meller, M D
Family Physician
6357 Oxon Hill Road,
Oxon Hill, MD 20745
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241 providers
Availability last updated 07/17/2026
Stephanie Meller, M D
Family Physician
6357 Oxon Hill Road,
Oxon Hill, MD 20745
Ndubuisi Okafor, MD, is a board-certified internal medicine physician with over 20 years of experience. At his practice, Okafor Medical Associates, located in Washington, DC, Dr. Okafor offers patients compassionate care for a variety of conditions including chronic disease management, ADHD, and internal medicine concerns as a leading primary care physician.
Dr. Okafor obtained his medical degree from the Howard University Hospital and is board-certified by the American Board of Internal Medicine. He is also specially trained in Advanced Trauma Life Support and Advanced Cardiovascular Life Support.
Dr. Okafor is a registered Civil Surgeon with the United States Center for Immigration Services, so he can provide Immigration Medical examinations with all the required tests in the facility. In addition, is a Registered Certified Medical Examiner with the Federal Motor Carrier Safety Administration, so he can provide medical examination and certification for commercial motor vehicle drivers.
When he is not treating his patients, Dr. Okafor enjoys spending time with his family and pursuing his hobbies which include football, soccer, and running. Dr. Okafor also speaks English, Ibo, Yoruba, and Hausa.
He looks forward to meeting new patients and giving them the best care possible.
Dr. Ndubuisi Okafor, MD
Internist
7603 Georgia Ave NW
Suite 100
Washington, DC 20012
Dr. Dan Bishwakarma is a board-certified family physician at Prime Medical Care, LLC, serving residents living in the Alexandria, Virginia area. He earned his M. B., B. S. (Bachelor in Medicine and Bachelor in Surgery) degree from Tribhuvan University, Nepal. He completed his residency in Family Medicine at the Wyckoff Heights Medical Center, New York, affiliated with Cornell University, in June 2008. He served as a chief resident in the last year of his residency. His residency training in the metropolitan environment of New York City and work experience soon after have given him the knowledge and skillset required to manage a wide variety of illnesses in a diverse patient population. He is currently practicing in Alexandria, VA providing primary and immediate care to the surrounding D.C. Metro areas.
At Prime Medical Care LLC, Dr. Bishwakarma places a strong emphasis on disease prevention and health promotion. To prevent illness, he encourages his patients to participate in annual comprehensive physical exams and periodic health checkups. He promotes health screening based on each patient’s individual personal history, family history, and risk factors. To promote health, he provides education on healthy habits such as exercise, good nutrition, smoking cessation and stress management. He treats a variety of chronic medical conditions including but not limited to:
In addition, he also treats patients who need immediate care like:
He’s very experienced as to when to refer patients to emergency care facilities and/or specialists where they can receive the level of care they need. Through social media, his patients say Dr. Bishwakarma is a very efficient and knowledgeable doctor with excellent bedside manner.
Personally, Dr. Bishwakarma is a family oriented person. He has been married for nearly 25 years. He has a very supportive wife and three wonderful children: two sons and one daughter. He loves to listen to music, read and spend time with his family when he is not working. He strongly believes that good family support is essential to cope with illnesses and to be healthy.
Dr. Dan Bishwakarma, MD
Family Physician
8101 Hinson Farm Road
Suite 209
Alexandria, VA 22306
Colleen Abell is a board-certified Family Nurse Practitioner. She graduated with a Master of Science in Nursing from Georgetown University in 2006. She has practiced as a nurse practitioner for the past sixteen years. Ms. Abell's experience includes working in a family medical clinic, but she spent most of her career providing care for patients recovering from Bariatric and GI surgical/oncology procedures. Prior to becoming a nurse practitioner, Ms. Abell worked as a Registered Nurse in cardiology and emergency medicine.
Colleen joined the Gastro Center of Maryland in 2021 after relocating from the NY/NJ area. She is dedicated to being a great provider and advocate for her patients. Outside of work, Ms. Abell enjoys spending time with her husband and three boys.
Colleen Abell, CRNP
Nurse Practitioner
6502 Kenilworth Ave
Suite 100
Riverdale, MD 20737
Abbi Lamparelli is a Nurse Practitioner with Gastro Centers of Maryland, bringing over a decade of hands-on clinical experience to her role. She began her career in medical-surgical and emergency medicine and transitioned into advanced practice nursing in 2023 after completing her training at Drexel University. She further advanced her education by earning a Doctor of Nursing Practice from Aspen University.
Abbi’s approach to patient care is deeply rooted in compassion and respect. She emphasizes a patient-centered, holistic, and evidence-based philosophy—ensuring that each individual receives personalized care tailored to their unique health journey. She remains committed to empowering patients with clear communication, shared decision-making, and attentive follow-up.
Beyond her clinical work, Abbi has a strong interest in healthcare research and ongoing professional development. Outside of work, Abbi enjoys reading, birdwatching, and trying new restaurants—interests that highlight her curiosity and appreciation for both quiet moments and fun new experiences.
Abbi Lamparelli
Nurse Practitioner
6502 Kenilworth Ave
Suite 100
Riverdale, MD 20737
Xinna Yi is a board-certified Family Nurse Practitioner with a Master of Science in Nursing from Wilkes University, which she completed in 2023. She brings a wealth of experience from her work in a family medical clinic and her previous role as a Registered Nurse specializing in cardiology medicine. Before transitioning to nursing, she graduated from medical school in China and gained one and a half years of experience as a gastrointestinal physician at an academic hospital in China.
Xinna is committed to patient-centered care, employing a collaborative, team-based approach to healthcare. She has a passion for continuous learning and teaching. In her personal life, she enjoys spending time with her family, reading, watching movies, and traveling.
Xinna Yi, FNP
Nurse Practitioner
6502 Kenilworth Ave
Suite 100
Riverdale, MD 20737
Capital City Primary and Immediate Care’s approach to family medicine gives you the flexibility to focus on your health when it works for you. Fernando Porter, MD, and the attentive care team partner with you to support your day-to-day health and self-care routines, at the office location in Silver Spring, Maryland. When you’re sick and need care, the team is standing by around the clock. They will be available to you 24/7 virtually or in-person during routine office hours with providers that can help get you on track. They’ll take the hassle and guesswork out of feeling better.
When you need to manage urgent, preventive, or chronic health conditions, we try our very best to make it easy and are there for you at the touch of a button. From healthy eating to vaccinations and preventive physical exams, we provide trusted health care solutions that are driven by compassion, integration of technology, and use of the most up-to-date, evidence-based information.
Capital City Primary and Immediate Care is a proud member of Privia Medical Group - a physician-led, multi-specialty, national medical group.
To make an appointment, call Capital City Primary and Immediate Care or book an appointment online today.
Dr Fernando Porter
Family Physician
12014 Georgia Ave
Silver Spring, MD 20902
Dr. Uzochukwu Unegbu, MD
Family Physician
9023 Woodyard Road
Clinton, MD 20735
Shemicka Asom, CRNP
Family Physician
1812 Briggs Road
Silver Spring, MD 20906
Tavershima Asom
Family Physician
1812 Briggs Road
Silver Spring, MD 20906
PRIMARY & ALTERNATIVE MEDICAL CENTER
Is Truly Patient Centered.
You are the reason we are here. Our goal is to help you feel better mentally, physically and spiritually. Our primary tools are listening to you sensitively, examining you carefully and then discussing with you thoroughly, our opinions and your options. We see health care as both a science and an art. There is rarely one right answer, and one size almost never fits all. When it comes to your health we will incorporate highly accurate diagnostic laboratories and advance imaging studies with our medical expertise. We will derive diagnoses and treat appropriately as well as make a referral to our affiliated specialist. We will be attentive to your specific needs, concerns and fears. We see you each as special individuals and not merely as people with high blood pressure, diabetes, depression, obesity or high cholesterol. We see ourselves as your primary care providers, health care advisers, educators, and teammates. Patients that take an active role in their health care generally do better.
Dr. Jean Welsh, MD
Family Physician
12162 Tech Rd
Silver Spring, MD 20904
Shemicka Asom, CRNP
Family Physician
13828 Bethpage Lane
Silver Spring, MD 20906