About Providers

Yohan Park, MD

Hello everyone! My name is Dr. Yohan Park and I would like to introduce myself. I am a pediatrician in Bayside, Queens. Coming from a family of physicians, I learned early on, the importance of providing care and compassion to family members who have entrusted their loved ones in my hands. My goal is to create and maintain an impeccable physician/patient relationship where parents can expect personal quality care. You will experience easy access to appointments and direct contact with me while your child is in my care. Outside of work, I love to travel, watch sports especially baseball (Yankees fan) and, most importantly, spend time with my lovely wife , daughter and son. 🙂

Doctorate of Medicine State University of New York Upstate Medical University
Bachelor of Science with Cum Laude Sophie Davis Biomedical Education of City College of New York
Long Island Jewish/Schneider Children’s Hospital

Attending Pediatrician at New York Hospital Queens Theresa Lang Ambulatory Center
Attending Pediatrician at Pediatric Asthma Center
Director of Pediatrics at Family Health Center NYHQ
Pediatric Instructor/Preceptor New York Presbyterian Hospital-Weill Cornell Medical Center

2006-2012 American Medical Association Physician's Recognition Award with Commendation
2010-14 Patients' Choice Award

Medical Mission Trip to Ecuador
Medical Mission Trip to Uganda/Rwanda
Charles B Wang Community Health Fair
Flushing Business Association Health Awareness Fair
YMCA Health Outreach
KASA Health Fair Licensure

Queens Pediatric Society
Korean American Medical Practitioners Association of New York

Program Director for Queens Pediatric Society
Secretary for Queens Pediatric Society

New York Hospital of Queens Annual Research Poster Convention, "Rwanda Medical Mission"
New York Hospital of Queens Pediatrics Grand Rounds Presentation "Foreign Medical Missions"
New York Hospital of Queens/Theresa Lang Clinic Study "MCHAT Screening Study on Autism"









Esther Sung, MD

Hello, I am the newest provider at Bayside Pediatrics, PC.  I grew up in Queens most of my childhood and adolescent years and spent most of my medical career in the tristate area only to return to Queens where my earliest memories began.  I am enthusiastic about Pediatrics and Adolescent Medicine and observe how the changes over the years have impacted the health of our children and families.  My particular interest is in complementary medicine and nutrition and the growing influence it will have on the traditional practice of Pediatrics.  To help support the mental and spiritual health of the middle and high school students, I volunteer and serve the youth group at my church in Queens. When I am not working, I enjoy spending time with my family and son hiking, traveling, and dining together.   My personal hobbies include baking and reading.  I look forward to working with you to provide care that addresses all aspects of your child’s health.


The City University of New York/ The Sophie Davis  School of  Biomedical Education at CCNY  Bachelor of Science, cum laude

State University of New York Upstate Medical  University, Doctor of Medicine

Winthrop University Hospital, Residency in  Pediatrics                                                                


Northport Pediatric & Adolescent Medicine

Saint Barnabus Medical Center, Provisional Staff

Usha Thomas, MD Pediatrics 

Arthur J. De Lorenza, MD Pediatrics 

Doc Care- multi-specialty practice

Advocare Cornerstone Pediatrics

Yoojin Kim, MD Pediatrics / Siu Anthony Lee, MD Pediatrics


Voluntary Staff for Good Tree Youth at Korean Church of Queens

Philippines Medical Missions Youth with a Mission   1/1998 to 3/1998

Macedonia Medical Outreach World Missions, NY (Times Square Church)  6/1998                                                      


American Academy of Pediatrics, fellow

American Medical Association, member

Christian Medical & Dental Association, member

Huntington Hospital- Northwell Health System, Voluntary Staff      



Lisa Guan NP
Pediatric Nurse Practitioner

Hello everyone, my name is Lisa Guan. I am a Board Certified Pediatric Nurse Practitioner (NP). I have been working as a Pediatric NP for more than 10 years. My clinical interest include management of pediatric primary care, developmental screening, asthma, allergic disorders, dermatological conditions, obesity/nutrition, and adolescent medicine. Before becoming an NP, I worked as a senior staff Registered Nurse on the Pediatric floor at NYU Langone Medical Center. As a mother of two children (ages 9 and 5), I have learned to treat my patients not only from a medical provider's point of view but also from a mother's. My passion is working with children. I am committed to keep abreast of the latest medical information in providing your family with the highest standard of care. In my free time, I enjoy traveling, swimming, skiing, and spending time with my family. I am also fluent in Chinese (both Cantonese and Mandarin).

Master of Science in Pediatric Nurse Practioner, New York University
Bachelor of Science in Nursing, New York University
Bachelor of Science in Psychology, State University of New York at Buffalo

Bayside Pediatric
Family Heath Center-NYPQ
Premium Medical Care
NYU Langone Medical Center