Kenneth G. Dobson, MD, MPH

Practice – Synergy Immediate Care

Emory School of Medicine, Doctor of Medicine

Johns Hopkins Bloomberg School of Public Health, Master of Public Health

Internship – Naval Hospital Oakland

Residency – Emory University Hospital

Fellowship – Emory University Hospital

Specialty – General Practice, Preventive Health, and Pathology

Languages – English and Spanish

Dr. Ken Dobson is an experienced clinician with years of general practice experience in the US Navy. He joined the Synergy family in 2018 after having been the Senior Public Health Advisor for a federal agency. He is especially adept at physical diagnosis and preventive medicine, having received Internal Medicine training and a Master of Public Health. Dr. Dobson enjoys teaching both his patients and students, and previously taught Physical Diagnosis Techniques in the Physician Assistant Masters program at Emory University. He is excited and honored to see patients in a primary care/urgent care clinic setting.

Dr. Dobson grew up in the North Georgia mountains, so in his spare time he enjoys vegetable gardening, fly fishing, cheering for the Georgia Bulldogs, and camping with his wife and three daughters.

Pallavi Heda, MD

Practice – Synergy Endocrinology Center

JJM Medical College, Doctor of Medicine

Residency – Lahey Hospital and Medical Center

Fellowship – Lahey Hospital and Medical Center

Specialty – Endocrinology, Diabetes and Metabolism

Languages – English and Hindi

Dr. Pallavi Heda specializes in endocrinology, diabetes, and metabolism. She is dual-board certified and completed both her Internal Medicine residency and an Endocrinology fellowship at Lahey Hospital and Medical Center in Burlington, MA. At Lahey, she actively participated in numerous research projects and presentations, including a publication in the American Journal of Medicine. She is an active member of Endocrine Society and American Association of Clinical Endocrinologists.

Dr. Heda joined Synergy in 2017 and is committed to providing the highest quality healthcare for patients with endocrine disorders in the Greater Tysons area.

Adnan Durrani, MD

Practice – Synergy Psychiatry Center

Rawalpindi Medical College, Doctor of Medicine

Residency – Einstein Healthcare Network

Specialty – Psychiatry

Languages – English, Hindi, Urdu, Punjabi, and Pashto

Dr. Adnan Durrani trained in psychiatry and specializes in anxiety, depression, bipolar disorder, ADHD, schizophrenia, OCD, PTSD, substance use disorders, and various other life crises. Dr. Durrani provides psychotherapy, CBT, and medication as necessary. In addition to English, he speaks Hindi, Urdu, Pashto, and Punjabi. Dr. Durrani is excited to join the Synergy team and to provide mental health services to the greater Tysons community and beyond!


Practice – Synergy OB/GYN Center

Tanta University, Egypt, Doctor of Medicine

Postgraduate Fellowship – SUNY Upstate Medical University

Residency – SUNY Upstate Medical University

Specialty – Obstetrics and Gynecology, Reproductive Endocrinology and Infertility

Languages – English and Arabic

Dr. Amr Etman is a board-certified OB/GYN who specializes in the evaluation and management of women’s bodies and reproductive health, and has been practicing for several decades. His main areas of interest are in female infertility, transvaginal ultrasonography, recurrent pregnancy loss, intrauterine insemination, IUD implantation and removal, endometriosis, polycystic ovarian syndrome, menopause, and female urinary incontinence. He is also experienced in treating all manner of gynecologic issues, in addition to first-trimester obstetrics.

Dr. Etman graduated from medical school in Egypt in 1987. He completed his PhD program in the United States in 1996 and completed his residency in Obstetrics and Gynecology and a post graduate fellowship in Reproductive Endocrinology and Infertility at the State University of New York, Upstate Medical University at Syracuse.

After running a successful practice in Wyoming, he recently moved to the Northern Virginia area. He currently resides in Tysons with his wife and pet dog.


Kimberly Arrington, MD

Practice – Synergy Dermatology Center

George Washington University, Doctor of Medicine

Residency – Georgetown University Hospital / MedStar Washington Hospital Center

Specialty – Dermatology

Languages – English and Spanish

Dr. Kimberly Arrington specializes in dermatology and is excited to be a part of the Synergy multispecialty practice serving Vienna, Tysons, and the greater Tysons area. She trained in dermatology and internal medicine and is available for exams and consultations in both English and Spanish.

Dr. Arrington graduated from Rutgers with a bachelor’s degree after double majoring in exercise science and psychology. She completed her master’s degree in biomedical sciences at Barry University. After graduating from medical school at George Washington, she received her post-graduate training in Internal Medicine and Dermatology at Georgetown’s Washington Hospital Center. She has published a variety of research articles in addition to writing a chapter in a dermatology textbook.

Dr. Arrington’s medical interests includes geriatric and adolescent dermatology, hair loss, and wellness. She has been trained and certified in aesthetic medicine including lasers, chemical peels, Botox, and facial fillers. She is a certified health coach trained by the National Society of Health Coaches specializing in obesity and weight loss. She is also a member of the Nutritional Aesthetics Alliance.

Dr. Arrington’s deep-seated passion for skin care stems from her desire to help others and make them feel and look their best. She is sensitive to the uniqueness of each patient’s situation and adapts her consultations and treatment options appropriately to accommodate individual needs and concerns.

In her spare time she enjoys volunteering at her church and spending time with her spouse and children.

Oluwatobi Yerokun, MD

Practice – Synergy Immediate Care

Howard University College of Medicine, Doctor of Medicine

Johns Hopkins Bloomberg School of Public Health, Master of Public Health

Residency – Howard University Hospital

Residency – Johns Hopkins

Specialty – General Practice and Wound Management

Dr. “Tobi” has a strong interest in Global and Community Health stating, “I want to help improve the way quality health care is distributed from the patient-doctor relationship to the overall healthcare infrastructure.”

“I take pride in Synergy’s focus on providing full circle primary care, eliminating many of the hurdles one goes through in order to receive quality care.  That is essential in establishing a community based healthcare facility that people can trust and a model for the promising future of medicine.”

In his free time, Dr. Tobi enjoys playing and coaching youth soccer.  He also enjoys basketball and loves music.

Bill Barrere, MD

Practice – Synergy Immediate Care

Medical College of Ohio, Doctor of Medicine

Residency – Shenandoah Valley

Specialty – Family Practice

Dr. Barrere has over 12 years of clinical experience in both a primary and an urgent care setting.

He has served as a Volunteer Physician at St. Lukes Community Clinic, is on the medical committee.

He loves getting to the root of issues and resolving them there. In his spare time, he enjoys home improvement, flying, kayaking.

He also enjoys cookies!

Denise Murdock, LCSW

Practice – Synergy Psychiatry Center

Radford University, Bachelor of Social Work

University of Maryland School of Social Work, Master of Social Work

Specialty – Psychotherapy and Counseling

Denise Murdock is a Licensed Clinical Social Worker and mental health therapist with over 25 years of experience in the mental health field. Prior to starting her private practice at Synergy Psychiatry Center, she worked for twelve years with clients experiencing mental health crises, including suicidal clients, at a county mental health program. She has worked primarily with adults, but also has some experience with children and with Systems Family Therapy. In addition, she has worked extensively with Geriatric clients and end of life issues.

Denise favors a practical approach to therapy, with cognitive behavioral techniques and a compassionate, client-centered session. She believes that identifying and building on client’s strengths and resources, challenging clients to see beyond negative self-images and to incorporate new positive thought patterns, lead to a better fit for clients in their environments, help to alleviate depression and anxiety and increase confidence and self-esteem. She commonly treats clients who suffer from depression or anxiety (or both), who are working through grief or a life transition, or who are struggling with self-esteem issues. She also assists people who come to her presenting as “stuck” in their personal development and lacking motivation or direction to move forward.

At Synergy Psychiatry Center, Denise sees patients ages 16 years and older.

Laura Horton, NP

Practice – Synergy Immediate Care

Thomas Jefferson University, Bachelor of Science in Nursing

Thomas Jefferson University, Master of Science in Nursing, Summa Cum Laude

Specialty – Family Practice and Pediatrics

As a Family Nurse Practitioner for over ten years, Laura Horton, FNP-C has developed a passion for patient education. She has an extensive clinical background including General Pediatrics & Family Medicine, Adolescent Specialty Medicine, Pediatric Gastroenterology & Hepatology, DOT certification and Retail Health. In addition, she has also held various faculty positions at well known Universities across the country, including at Georgetown University’s School of Nursing and Health Studies, as a way to give back and promote the role of the Family Nurse Practitioner.

Outside of work, Laura enjoys cycling, swimming, and finding her next cup of coffee.

Colleen Kelley, PA

Practice – Synergy Immediate Care

University of Florida, Bachelor of Science in Physical Education/Exercise Physiology

University of Arizona, Master of Science in Exercise Physiology

George Washington University, Bachelor of Science in Physician Assistant Studies

Specialty – Pediatrics and Nutrition

Colleen Kelley, PA-C, has been working in the clinical arena for over 20 years. Before becoming a PA she did clinical and nutrition research. The first sixteen years of her career was spent treating pediatric patients aged newborn to 21 years of age. Since 2013 she has provided health care to both children and adults. Colleen enjoys the primary care/urgent care combination because she appreciates the importance of continuity of care and finds satisfaction in seeing patients through their recovery process.

Colleen has several interests in medicine including musculoskeletal, neurologic and metabolic problems, as well as preventive medicine interests that incorporate fitness and nutrition. When she is not treating patients or reading medical journals, she enjoys walking her dog and cat, activities with her three children, and visiting with friends and family.

Joe Pena, PA

Practice – Synergy Immediate Care

University of Nebraska Medical Center, Bachelor of Physician Assistant Studies

University of Nebraska Medical Center, Master of Physician Assistant Studies

Specialty – Critical Care Medicine

Languages – English and Spanish

Joe has 11 years of experience and is fluent in Spanish.

He has received training in aviation medicine, diving medicine, and is certified rescue diver and hyperbaric chamber.

Joe is always the consummate professional, and with a warm personality, his patients always feel they are in good hands. He enjoys hunting, scuba diving, and medical missions to South America.

“The most important to aspect of my job is placing the patient first.  Placing their care first helps develop a team approach and effective communication to assist them throughout their entire spectrum of care,” says Joe.

“Synergy [for me] provides an excellent opportunity and setting to ensure that healthcare does not lose touch with our number one priority – the patient.”

Po Storrs, NP

Practice – Synergy Immediate Care

University of Virginia, Bachelor of Science in Nursing

Johns Hopkins University, Master of Science in Nursing

Specialty – Family Practice and Women’s Health

Po has practiced for over 10 years and she enjoys reading books, cooking, watching football (fav teams Redskins and Ravens), playing with her Yorkie terrier.

When asked what is most important to her work, she replied, “Nice working environment with great staff.”

In addition, she describes her desire to work with Synergy, “I enjoy providing medical care in both urgent and primary care settings and to help the local community.”