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

Gregory John Diehl, MD

Individual provider Plastic Surgery Physician · NPI 1447249214

Gregory John Diehl, MD is a Plastic Surgery Physician in Port Jefferson Station, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2005
Specialties on file
2
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

1500 Route 112 Bldg # 10
Port Jefferson Station, NY 11776
Phone: (631) 476-7300
Fax: (631) 476-7304
Show map & directions

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

Specialties & licences

Plastic Surgery Physician (primary) Taxonomy 208200000X · Licence 1902162 (NY)
Surgery of the Hand (Plastic Surgery) Physician Taxonomy 2082S0105X · Licence 1902162 (NY)

Record details

NPI number1447249214
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 14, 2005
Last updated in NPPESMay 20, 2020
Certification dateMay 20, 2020

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