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Dr. John Gavencak, MD

Pediatric Allergist, Allergist

Professional statement

Dr. John Gavencak attended New York Medical College, where he received his medical degree. He completed his residency in pediatrics at Metropolitan Hospital Center. He practices at New York Internal Medicine and is a trusted allergist and pediatric allergist. Currently, Dr. Gavencak serves the communities of Whitestone, Bayside, and Flushing, NY. Dr. Gavencak is certified by the American Board of Pediatrics and the American Board of Allergy and Immunology. He believes that an amalgamation of sound medical judgment, technology, and an optimistic attitude are needed to guarantee quick recovery and thorough care. Dr. Gavencak treats both adults and children. He specializes in the treatment of asthma, hay fever (allergic rhinitis), chronic sinusitis, and otitis media (fluid in the ears) as well aw skin conditions such as hives, eczema, and food allergy. He uses several different methods of testing (scratch or blood tests) and stresses environmental control of different allergens. Treatment may include immunotherapy and/or allergen avoidance. Dr. Gavencak explores many options and customizes all treatment methods for each patient. He cares deeply that parents and the children learn about the challenges of growth, development, behavior, preventive health, and management of illness while receiving the treatment they need.

In-network insurances

  • 1199SEIU
  • AmeriGroup
  • Anthem Blue Cross


  • Allergist
  • Pediatric Allergist

Practice names

Hospital affiliations

  • South Nassau Communities Hospital

Board certifications

  • American Board of Allergy and Immunology
  • American Board of Pediatrics

Education and training

  • Medical School - New York Medical College, Doctor of Medicine
  • Metropolitan Hospital Center, Residency in Pediatrics
  • Metropolitan Hospital, Fellowship in Allergy and Immunology

Zocdoc awards

Rapid registration
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Languages spoken

  • English

Provider's gender


NPI number


Office locations

New York Internal Medicine

17- 52 Francis Lewis Blvd

Flushing, NY 11357

New York Internal Medicine

17-52 Francis Lewis Blvd

Whitestone, NY 11357

Patient reviews
All reviews have been submitted by patients after seeing the provider. For more information, check out our Patient Knowledge Base.
Wait time
Bedside manner

Wait time
Bedside manner
First time visit It was ok Not really kid friendly
Less than 3 months ago
Source: Zocdoc
Wait time
Bedside manner
My visit to Dr. Gavencak’s office was great. The staff was patient, helpful, and timely. Dr. Gavencak was professional and didn’t make me feel stupid. I highly recommend this office.
Source: Zocdoc
Wait time
Bedside manner
Source: Zocdoc
ZocdocFind an AllergistDr. John Gavencak, MD