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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. ROBERT F SONNTAG DDS
NPI 1144295098
Dentist - General Practice in Saginaw, MI

Active since February 22, 2006
4400 FASHION SQUARE BLVD, SAGINAW, MI 48603(989) 790-3357(989) 790-3443 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Robert F Sonntag Dds NPPES

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

DR. ROBERT F SONNTAG DDS (NPI 1144295098) is an individual general practice provider in Saginaw, Michigan, licensed in Michigan (12157) and active in the NPI registry since February 2006.

NPPES Registry Identity

NPI1144295098
Entity TypeIndividualMale
Primary Taxonomy1223G0001X
Provider Legal NameDR. ROBERT F SONNTAGCredential: DDS
Location Address4400 FASHION SQUARE BLVDSaginaw, MI 48603-1251
Mailing Address4400 Fashion Square Blvd, P O Box 5795Saginaw, MI 48603-1251 · (989) 790-3357 · Fax (989) 790-3443
Phone(989) 790-3357
Fax(989) 790-3443
Sole ProprietorNo
Enumeration DateFebruary 22, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1144295098 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 · 12157
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.
4400 FASHION SQUARE BLVD, Saginaw, MI 48603
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Other Identifiers 3

Medicaid2915010MI
Other12157MI · State License #
OtherD1215706MI · Bcbs Dental Provider #

Other Providers at the Same Location NPPES 3

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

PATRICK T RUTH, D.D.S., P.L.L.C
Clinic/Center (Dental)
4400 FASHION SQUARE BLVD
SAGINAW, MI 48603
Saginaw County (989) 790-3357
ROBERT F. SONNTAG, D.D.S. PLLC
Dentist (General Practice)
4400 FASHION SQUARE BLVD
SAGINAW, MI 48603
Saginaw County (989) 790-3357
DR. PATRICK THOMAS RUTH D.D.S.
Dentist (General Practice)
4400 FASHION SQUARE BLVD
SAGINAW, MI 48603
Saginaw County (989) 790-3357

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 Robert Sonntag's NPI number?

The NPI number for Robert Sonntag is 1144295098. It was assigned to this individual provider in the NPPES registry on February 22, 2006.

Where is Robert Sonntag located?

Robert Sonntag practices at 4400 Fashion Square Blvd, Saginaw, MI 48603. The listed phone number is (989) 790-3357.

What is Robert Sonntag's specialty?

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

When was this NPI record last updated?

The NPPES record for Robert Sonntag was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 days 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.