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

William Young Guo, MD

Individual provider Dermatology Physician · NPI 1942888482

William Young Guo, MD is a Dermatology Physician in Stony Brook, New York. Licensed in New York. Registered with an NPI since 2021.

Licensed in
NY
In the registry since
2021
Specialties on file
2
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

1320 Stony Brook Rd Bldg F
Stony Brook, NY 11790-2206
Phone: (631) 444-4200
Show map & directions

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

Specialties & licences

MOHS-Micrographic Surgery Physician (primary) Taxonomy 207ND0101X · Licence 343125 (NY)
Dermatology Physician Taxonomy 207N00000X · Licence 343125 (NY)

Record details

NPI number1942888482
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 29, 2021
Last updated in NPPESAugust 3, 2026
Certification dateAugust 3, 2026
Mailing address1320 Stony Brook Rd Bldg F, Stony Brook, NY 11790-2206

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