Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. John Richard Gavencak, MD

Individual provider Allergy Physician · NPI 1821089392

Dr. John Richard Gavencak, MD is an Allergy/Immunology in East Rockaway, New York. Graduated from New York Medical College in 1974, 52 years ago. Practices with New York Internal Medicine PC, a 10-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
52
Trained at
New York Medical College
Licensed in
NY
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

400 Atlantic Ave
East Rockaway, NY 11518-1433
Phone: (516) 599-2732
Fax: (516) 593-2075
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Allergy Physician (primary) Taxonomy 207KA0200X · Licence 124874 (NY)

Record details

NPI number1821089392
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 2, 2005
Last updated in NPPESJuly 13, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyALLERGY/IMMUNOLOGY
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 1974 (52 years in practice)
Group practice New York Internal Medicine Pc — 10 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount