New Patients (202) 455-0901

Current Patients (202) 686-9100

4400 Jenifer St. NW #340 Washington, DC 20015

Washington DC Dentist Office Staff

Nancy Barr

Nancy played many roles in the early days of Dr. Cobb’s practice, assisting with patients as well as handling the front office and lab work. As the practice has grown, Nancy has assumed the role of office manager. In addition, she continues to assist with patients, performs most lab work and manages Dr. Cobb’s busy teaching schedule.

An avid Petanque player, Nancy has traveled and participated in tournaments. She also enjoys visiting her niece and her husband and their two daughters in California.

Patricia Szubielski

Pat has been with Dr. Cobb for over 20 years. A valuable member of the practice, Pat has worked in various capacities; at the front desk greeting patients and caring for patients treatment scheduling, financial matters and phone queries.

You may be surprised the first time you see Pat and Nancy together, yes they’re sisters – but no they’re not twins.

Pamela Oginz

Pam graduated from the University of Bridgeport’s Fones School of Dental Hygiene, the world’s first school for dental hygiene. Pam’s career spans numerous dental specialties including general practice, cosmetic and restorative dentistry and periodontics. Like Dr. Cobb, Pam believes in the importance of continuing education to enhance and expand knowledge of the most current technologies.

Pam recently joined Dr. Cobb in the Dominican Republic on a medical/dental mission, Somos Amigos, volunteering a week of her time to underprivileged individuals and giving them free dental care.

Pam is proud of her three grown daughters, a son in law, and a grandson. An adventurer, Pam enjoys travel, especially where she can incorporate dental hygiene lessons in the local community.

Sandra Lobo

Sandra Lobo was born and raised in El Salvador and came to the United States when she was 20 years old. In 1998, Sandra became a Certified Dental Assistant and successfully completed a board approved radiology course for dental assistants. She has worked with Dr. Cobb since 2006. Working with Dr. Cobb, she says, has taught her a lot and improved her skills.

While she finds her work very enjoyable, she cherishes time spent with her husband and daughter. She also enjoys gardening, exercising, and bike riding.


Sandra Rach

Sandra Rach is a graduate of the University of Maryland Dental School in Baltimore with a Bachelor of Science in Dental Hygiene. She has enjoyed working with Dr. Cobb for over 16 years.

Sandra and her husband live in Severna Park, Maryland along with their two daughters, son, golden retriever, and bunny. The family enjoys boating and is very actively involved in swim team, ice hockey and youth theater.

Ina Hersh

Ina Hersh is a native Washingtonian. A dental hygienist with a degree from the University of Maryland Dental School, Ina has been practicing since 1984. She has worked with Dr. Cobb for more than seven years.

Ina and her husband reside in Columbia, Maryland with their son, daughter and yellow lab, Cleo. She enjoys traveling, reading, movies and running.


Bio coming soon!