DR. GIANH NGUYEN PORTNOY DDS
NPI 1336363993
Dentist - General Practice in Okemos, MI

Q: What is Gianh Portnoy's NPI number?

The NPI number for Gianh Portnoy is 1336363993. It was assigned to this individual provider in the NPPES registry on April 12, 2007.

Q: What is Gianh Portnoy's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Q: When was this NPI record last updated?

The NPPES record for Gianh Portnoy was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since April 12, 2007

1738 HAMILTON RD, OKEMOS, MI 48864(517) 349-3266(517) 381-2457 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Dr. Gianh Nguyen Portnoy Dds NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GIANH NGUYEN PORTNOY DDS (NPI 1336363993) is an individual general practice provider in Okemos, Michigan, licensed in Michigan (2901018167) and active in the NPI registry since April 2007.

NPPES Registry Identity

NPI1336363993

Entity TypeIndividualFemale

Primary Taxonomy1223G0001X

Provider Legal NameDR. GIANH NGUYEN PORTNOYCredential: DDS

Location Address1738 HAMILTON RDOkemos, MI 48864-1811

Mailing Address2345 Indian Hills DrOkemos, MI 48864-2016 · (517) 381-5043

Phone(517) 349-3266

Fax(517) 381-2457

Sole ProprietorNo

Enumeration DateApril 12, 2007

Last NPPES UpdateJuly 8, 2007

✔ NPI 1336363993 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers

Taxonomy Code1223G0001X

License✔ Licensed in MI · 2901018167

Definition

A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.

1738 HAMILTON RD, Okemos, MI 48864

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Other Identifiers 1

Other1316952732MI · Portnoy And Tu Dds Pc

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Delta Dental of Michigan.Insurance ›

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PORTNOY AND TU DDS PC

Dentist (General Practice)

1738 HAMILTON RD
OKEMOS, MI 48864

Ingham County (517) 349-3266

OKEMOS SMILE CENTER OF MICHIGAN PLLC

Clinic/Center (Dental)

1738 HAMILTON RD
OKEMOS, MI 48864

Ingham County (517) 281-9144

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gianh Portnoy's NPI number?

The NPI number for Gianh Portnoy is 1336363993. It was assigned to this individual provider in the NPPES registry on April 12, 2007.

Where is Gianh Portnoy located?

Gianh Portnoy practices at 1738 Hamilton Rd, Okemos, MI 48864. The listed phone number is (517) 349-3266.

What is Gianh Portnoy's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

What insurance does Gianh Portnoy accept?

Health plans from Delta Dental of Michigan list Gianh Portnoy as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gianh Portnoy was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.