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

Dr. Gianh Nguyen Portnoy, DDS

Individual provider General Practice Dentistry · NPI 1336363993

Dr. Gianh Nguyen Portnoy, DDS practises General Practice Dentistry in Okemos, Michigan. Licensed in Michigan. Registered with an NPI since 2007.

Licensed in
MI
In the registry since
2007
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.

See every abbreviation used in this directory →

Practice location Address checks out

1738 Hamilton Rd
Okemos, MI 48864-1811 Not confirmed with CMS for 19 years — call before visiting
Phone: (517) 349-3266
Fax: (517) 381-2457
Show map & directions

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

Specialties & licences

General Practice Dentistry (primary) Taxonomy 1223G0001X · Licence 2901018167 (MI)

Record details

NPI number1336363993
Entity typeIndividual (Type 1)
GenderFemale
Credentials DDS
Sole proprietorNo
NPI enumeratedApril 12, 2007
Last updated in NPPESJuly 8, 2007

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