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Meet Our Long Island Dentists

Ehrenman & Khan Pediatric Dentistry


Dr Ehrenman Headshot - Long Island Dentists - Ehrenman & Khan Pediatric Dentistry

A passionate learner, Dr. Ehrenman received his DDS degree from S.U.N.Y. at Stony Brook, School of Dental Medicine in 1985.  In 1987, he completed his residency in Pediatric Dentistry at Eastman Dental Center in Rochester, NY.  Upon completion of his residency, Dr. Ehrenman joined the practice with Drs. Hirsch and Hall.

Since then, he has taken over 1600 hours of continuing education and is a member and past president of the Long Island Dental Study Club.  In fact, he is so passionate about education that he has been a clinical assistant professor in the Department of Orthodontics and Pediatric Dentistry at S.U.N.Y. Stony Brook, School of Dental Medicine from 2010 to the present.  He is affiliated with NYU Langone Hospital-Long Island in Mineola, Northwell Hospital-Syosset, and Stony Brook University Hospital.

Dr. Ehrenman became a Diplomate of the American Board of Pediatric Dentistry in 1995 and continues to be an active member in the American Academy of Pediatric Dentistry.  In April 2024, he received his Lifetime Diplomate status and award from the American Board of Pediatric Dentistry. He is also a member of the American Dental Association, New York State Dental Association and the Nassau County Dental Society.

Patients and parents alike appreciate his dedication to excellence-excellence so outstanding that he was named Top DDS of 2012 by Long Island Pulse Magazine!

In his free time, Dr. Ehrenman enjoys spending time with his wife Kelly.  They have two children, Marc who resides in Chicago and Alexandra in Brooklyn.  Dr. Ehrenman is an avid golfer and a NY Ranger fan.


Dr Khan Headshot - Long Island Dentists - Ehrenman & Khan Pediatric Dentistry

Dr. Mahnaz Khan was born and raised in Brooklyn, New York. She left the borough to attend the State University of New York (SUNY) at Binghamton where she was awarded Bachelor of Science degrees in Biochemistry and Philosophy in 1996. Later, Dr. Khan attended the SUNY at Buffalo School of Dental Medicine where she earned a Doctor of Dental Surgery (DDS) with a Minor in Pediatrics. While pursuing her DDS, Dr. Khan participated in research projects and was selected by the faculty of the School to present her project at the prestigious Hinman Dental Meeting in Memphis, Tennessee. She was also awarded The American Society of Dentistry for Children Award and the Department of Pediatric and Community Dentistry Award, both in May 2000.

Dr. Khan continued her education, completing advanced training in the specialty of Pediatric Dentistry at the Children’s Hospital of Buffalo (CHOB). While a resident at CHOB, her training included behavior management, caring for the special needs patients, sedation dentistry, hospital dentistry, and caring for the traumatic dental emergency. Dr. Khan achieved “Board Certification” becoming a Diplomate of the American Board of Pediatric Dentistry in September 2006. Since graduation, Dr. Khan has accrued an impressive amount of continuing education, including attaining certification in oral sedation and Invisalign™.

In 2002, Dr. Khan returned “downstate” when she joined Drs. Norman Hirsch and Glen Ehrenman in private practice in Westbury, NY, becoming a partner in the practice in 2007. In 2012, she was honored to be named a Top Pediatric Dentist on Long Island by Long Island Pulse Magazine.

Dr. Khan is on the medical/dental staff at NYU Winthrop Hospital, maintaining surgical privileges at both. Dr. Khan is an attending at Nassau University Medical Center, where she provides instruction in pediatric dentistry to dental residents enrolled in advanced education training. She is an active member of the American Dental Association, Nassau County Dental Society, the American Academy of Pediatric Dentistry, the American Board of Pediatric Dentistry and the New York State Association of Pediatric Dentists.

Dr. Khan is passionate about community outreach and education, and she participates in the Nassau County “Give Kids a Smile” day where over 1,000 children receive a free examination. She and the Ehrenman & Khan team provide educational and fun presentations to kids at preschools and elementary schools across Nassau and Suffolk County to promote Children’s Dental Health Month. She also lectures to expectant mothers at NYUWinthrop Hospital.

After living in Mineola and Lynbrook, Dr. Khan has settled in Rockville Centre with her husband, Michael, and her three boys, Harris, Ryan and Aiden.