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

Guy I. Sydney, MD

Individual provider Internal Medicine Physician · NPI 1386218089

Guy I. Sydney, MD is an Internal Medicine Physician in New Haven, Connecticut. Licensed in Illinois. Registered with an NPI since 2021.

Licensed in
IL
In the registry since
2021
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

20 York St
New Haven, CT 06510-3220
Phone: (203) 688-4242
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Student in an Organized Health Care Education/Training Program (primary) Taxonomy 390200000X · Licence 1.077714-RES
Internal Medicine Physician Taxonomy 207R00000X · Licence 125077717 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036169535 (IL)

Record details

NPI number1386218089
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 17, 2021
Last updated in NPPESMay 12, 2024
Certification dateMay 12, 2024
Mailing address20 York St, New Haven, CT 06510-3220

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