Image of NYC skyline
PHCQ ADDRESS: 30-14 37th Street Astoria, NY 11103 718-278-9500 Pediatric Health Care of Queens / Demetrios Markouizos, M.D., F.A.A.P.
Welcome to Pediatric Health Care of Queens (PHCQ), specializing in the health and preventative medical care of infants, children and teens for the past twenty-eight years. WELCOME

Founded by Dr. Demetrios Markouizos,

a pillar of the Queens community, and conveniently located in Central Astoria, PHCQ recently opened a new state-of-the-art office at 30-14 37th Street, easily accessible by all methods of transportation.


As soon as you and your child enter our office, you will smile. The ambiance is quite inviting to parents and their children.


Our highly skilled staff is friendly and caring. We value your time & pride ourselves in getting every patient seen on schedule. We have taken great care to provide an environment in which you will feel at home as we join forces in making sure your child's health is in optimal condition.

As seen in the

Demetrios Markouizos, M.D., FAAP
Pediatric Health Care of Queens


Board Certified in:
Pediatrics and Obesity Medicine


Hospital Affiliation:

New York Presbyterian

Weill Cornell Medical Center

North Shore University Hospital

Long Island Jewish Medical Center


Special Expertise:

Asthma, GERD and Obesity

Image of Dr. Demetrois Markouizos, M.D., F.A.A.P.

Castle Connolly Top Doctors® represents the top 10% of board-certified medical specialists in their region, selected for their noteworthy training, education and practice reputation, out of tens of thousands nominated by their physician peers.

 On Site 
Full Service 
Breathing Tests Spirometry Pulse OX NIOX
Medicine Dietary 
Testing PCR Testing Strep, Flu and RSV

Demetrios Markouizos, M.D., F.A.A.P., is Board-Certified in Pediatrics and Obesity Medicine  and is named 'Top Doctor of Astoria' by Castle Connolly Medical Ltd.


Dr. Markouizos is licensed in the state of New York and has served the Queens community (with patients from the tri-state area and abroad) for over twenty-eight years.

See full bio....

Brian Chung, D.O., joined PHCQ in 2010. Aside from his licensure as a Doctor of Osteopathy, Dr. Chung holds a Ph.D. in Pharmacology.


Dr. Chung performed his residency at Nassau University Medical Center and was a Staff Pharmacist at Long Island Jewish Medical Center (presently North Shore/LIJ Health Systems).

See full bio....


Dr. Jennifer Yaxi Chen, M.D., F.A.A.P.,
a Board-Certified pediatrician, joined Pediatric Healthcare of Queens with strong and impressive credentials.


Dr. Chen’s background includes tenures at Cohen Children’s Medical Center, where she completed a three-year residency program managing the medical concerns of diverse pediatric patient groups possessing a myriad of pathologies, including acute asthma exacerbation.

See full bio....

Image of Dr. Demetrios Markouizos, M.D., F.A.A.P.
Image of Dr. Brian Chung, D.O.
Dr. Demetrios Markouizos Dr. Brian Chung
Image of Jennifer Yaxi Chen, M.D., F.A.A.P.
Dr. Jennifer Yaxi Chen

"My son suffered from severe GERD and all of the associated severe side effects which required surgeries. Dr. Markouizos diagnosed the condition, guided us every-single step of the way, recommended and constantly interacted with his gastroenterologist and surgeon through this arduous process. Today, I have a healthy teenage boy who is excelling in school and life."


Maria Constant –

mother of Phillip Constant

Image of PHCQ reception area


30-14 37th Street

Astoria, New York  11103



FAX:   718- 278-2430

Pediatric Health Clinic of Queens

© Copyright 2023

All Rights Reserved

Site designed by SoVisual