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The Exchange Dental Group


Dedicated Staff

Samuel Kramer, DDS

Assistant Clinical Director

Dr. Kramer has been with The Exchange Dental Group since 1994. He started his career as a general dentist and earned his certificate in endodontics from New York University. Currently, he serves as a clinical assistant professor of endodontics at NYU College of Dentistry. In his role at the practice as assistant clinical director, he provides invaluable insights to the clinical staff. When he is not teaching and mentoring students and peers, Dr. Kramer enjoys maintaining a level of fitness to play competitive softball and spending Sunday mornings in Rockland County.

Dorian Woo

Practice Manager

Dorian has been a vital component of The Exchange Dental Group since 2000, serving the residents and employees of the downtown area through all its changes and challenges. Having grown with the practice, she understands the full scope of services patients have come to know and expect. During her tenure here, she has graduated from file clerk to practice manager. She also completed her bachelor’s degree in Business Management and Finance from Brooklyn College. Outside of the office, she is a brown belt Brazilian Jiu-Jitsu practitioner and salsa dancer who enjoys traveling the world and mentoring youngsters in STEM promotion.

Andrea Sloan

Office & IT Administrator

Andrea has played an important role at The Exchange Dental group since 2005. She started her career as a dental hygienist and continued her education thereafter, earning her bachelor’s degree in health care management and a master’s degree in education. She combined all three disciplines and became one of the first Certified Dentrix Trainers, the software used to keep the practice running smoothly and efficiently.

Howard Wimmer, DDS


Dr. Howard Wimmer is a graduate of New York University College of Dentistry, the Magna Institute of Dental Technology and Yeshiva University. He founded this practice in 1982 at
39 Broadway, its current and only location, and actively practiced general and cosmetic dentistry for more than 25 years. In 2007, Dr. Wimmer assumed his current and exclusive role as Director of The Exchange Dental Group.

He is happily married since 1979 to his lovely wife Ellen. They have four wonderful children and seven adorable grandchildren. When not spending free time with his family, he also enjoys reading and a round of golf.

“To yourself and your training be true, and never be false to patients or staff.”

Anjali Aggarwal, DMD

General Dentist

Dr. Anjali Aggarwal was a practicing dentist in India before moving to New York. She graduated from New York University in 2009 where she was the recipient of the Omicron Kappa Upsilon award for academic excellence. While at NYU, she also practiced at the university faculty practice. After graduation, she was inducted into the general practice residency program at Newark Beth Israel Hospital, where she further enhanced her clinical knowledge and skills. As a member of the New York and New Jersey Dental Association, American Dental Association and Academy of General Dentistry, Dr. Aggarwal keeps abreast with the latest technologies and information.

When not working, Dr. Aggarwal loves to read, travel and spend time with family and friends.

Susan Albano, DMD


Dr. Susan Albano was born and raised in Bergen County, New Jersey. After graduating Fair Lawn High School she attended Rutgers College at Rutgers University where she earned a Bachelor of Art degree. She continued her education for an additional six years attending New Jersey Dental School at the University of Medicine and Dentistry of New Jersey, which awarded her a Doctor of Dental Medicine degree and a postgraduate specialty certificate in prosthodontics. The program training included intensive implant and cosmetic aspects of dental care. Dr. Albano comes from a large family of dedicated medical and dental professionals and truly cares about her patients.

She has been happily living in Battery Park City since 2005 with her husband, who is also a dentist, and her two teenage daughters. In her spare time she enjoys photography, cooking and skiing.

Sasha Alexander, DDS


Sasha Alexander, DDS, is a 2007 graduate of the State University of New York-Buffalo School of Dental Medicine, where he graduated Magna Cum Laude and holds a post- graduate degree from the Columbia University School of Dental Medicine in Endodontics. He also completed a General Practice Residency at the renown Rush University Medical Center in Chicago where he engaged in research geared towards educating dentists in the proper treatment planning of root canal therapies and implant cases. He has been awarded the Tucker Scholarship for academic performance and the Outstanding Achievements Award in Periodontics presented by the American Academy of Periodontology. He also has several awards in Chemistry and Biochemistry. It would be hard to find an Endodontist more qualified to treat our patients.

Dr. Alexander has reached out to the community at large to offer his help and support to underserved communities in the Dominican Republic and Mexico, as well as being a volunteer dentist to the New York State Special Olympics Athletes. We are immensely proud to have such a well rounded and generous humanitarian performing specialized root canal procedures for our patients.

David Berkower, DDS

Pediatric Dentist

Dr. David Berkower was born and raised in Staten Island, New York and graduated from Yeshiva University. He then received his Doctor of Dental Surgery degree from Columbia University College of Dental Medicine. After finishing dental school, he completed a two year residency in pediatric dentistry in Tucson, Arizona, serving as chief resident in his second year. He then returned to New York to continue his career as a pediatric dentist. He enjoys playing basketball, traveling, spending time with friends and family, and rooting for the Mets, Nets and Jets. Dr. David is a member of the American Dental Association and the American Academy of Pediatric Dentists.

Jalal Fatehi, DDS

Oral Surgeon

Dr. Jalal Fatehi is a Board certified Oral and Maxillofacial surgeon and member of the American Association of Oral and Maxillofacial Surgeons. He completed his dental training at the University of North Carolina at Chapel Hill in 1990 followed by a year of Advanced General Dentistry and a year’s internship in Oral and Maxillofacial Surgery at Columbia Presbyterian Medical Center. He then completed his residency in Oral and Maxillofacial Surgery at Woodhull Medical and Mental Health Center in Brooklyn, New York in 1996.

Yael Feldman, DMD

Pediatric Dentist

Dr. Yael Feldman is a board certified pediatric dentist. Dr. Feldman graduated from the University of Medicine and Dentistry of New Jersey Dental School in 2003. She then went on to complete a general practice residency through Montefiore Medical Center at Jacobi Hospital. Dr. Feldman completed her specialty training in pediatric dentistry at St. Barnabas Hospital.

In March 2008, Dr. Feldman became a Diplomate of the American Board of Pediatric Dentistry. She won the Richard R. Pugh Achievement Award for scoring in the top 3% on her board exam. Dr. Feldman is currently a member of the American Academy of Pediatric Dentistry, The New York Academy of Pediatric Dentistry and the New Jersey Academy of Pediatric Dentistry. She has been with the Exchange Dental Group since 2006, and also works as an attending at SBH Health System training future pediatric dentists.

Dr. Feldman strives to provide a comfortable, professional and easy visit for every child. She is committed to providing the highest level of care for your children. Dr. Feldman excels at putting both the child and parent at ease throughout the dental experience.

In her spare time Dr. Feldman enjoys reading, cooking, and spending time with her husband and four daughters.