Dr. Koganski has been a practicing physician in Bucks County since 1997 and is Board Certified by the American Board of Internal Medicine.  In 2017, he was named a Top Docs™ in Internal Medicine by the Philadelphia Magazine.  Dr. Koganski was also named as the Smartest Family Physician in America for 2013, 2014, 2016 and 2017, as well as the Smartest Doc™ Internist in 2014, 2015, 2016 and 2017 by in collaboration with the Cleveland Clinic, winning these honors among thousands of participating physicians countrywide.

His practice is dedicated to the comprehensive treatment of the whole patient by combining traditional primary care with a Functional and Holistic Medicine approach.  Dr. Koganski specializes in prevention, diagnosis and treatment of complex and chronic medical conditions, utilizing the most up-to-date advances in conventional and integrative medicine.  He strives to continually improve his knowledge through extensive medical education.

Dr. Koganski offers a Concierge Membership Program to his patients, where he is able to offer consultations and treatments that incorporate multiple holistic modalities of both Western and Eastern medicine, including Functional Medicine, Medical Acupuncture, homeopathy, biopuncture, and herbal medicine.  Such modalities are typically not covered by any insurance, but are included in Dr. Koganski’s Concierge Program.

Dr. Koganski is on staff at the St. Mary Medical Center with full admitting privileges. He is also the Medical Director of Forrest Health of Bucks County, a bariatric specialty hospital in Langhorne.  He is a member of American Medical Association (AMA), the American College of Physicians (ACP), the Institute of Functional Medicine (IFM) and the American Academy of Medical Acupuncture (AAMA).

Dr. Koganski lives in Bucks County with his wife, Elina and their 2 Kerry Blue Terriers.  They also have 2 grown children.  Dr. Koganski is an avid sport enthusiast, who enjoys skiing, scuba diving, swimming and tennis, as well as travel with his family.

Arun Thakur, MD, Dr. Arun Thakur is a Board-Certified Internist with extensive clinical experience including hospital, office, and nursing home medicine, consultations to psychiatric facilities and critical care. For the last 15 years, Dr. Thakur has been dedicated to inpatient medicine at the St. Mary Medical Center, currently working as a Hospitalist for the Newtown Internal Medicine group. She has also worked at Graduate and Mercy Catholic Hospitals. Dr. Thakur has held positions of Chief Medical Officer and Medical Director, in various health systems. Dr. Thakur believes in an unhurried synthesis of the art and science of medicine, incorporating both traditional and evolving treatment protocols, while always maintaining a patient-centered approach. Dr. Thakur also strongly believes that family and caretakers should be active participants in the comprehensive treatment, and achieves this through empathy and education.

Marika Hartman, CRNP, Marika graduated from New York University (NYU) with a degree in Nursing Education and LaSalle University as a Nurse Practitioner (CRNP). She has practiced in a variety of healthcare settings and brings an extensive background to her work. She enjoys treating the individual as a whole and establishing herself as a resource for her patients to allow them to a achieve a healthy lifestyle.


St. Mary Medical Office Building

1205 Langhorne-Newtown Rd, Suite 202

Langhorne, PA 19047


Tel: (215) 750 - 7000

Fax: (215) 750 - 9572


Email for Patient inquiries:


Email for Business inquiries:

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