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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

THORNTON SIMNITT DMD
NPI 1922586932
Dentist - General Practice in Hillsboro, OR

Active since August 01, 2018Opted out of Medicare · through Apr 1, 2028
2831 SE CORNELIUS PASS RD, HILLSBORO, OR 97129(503) 642-5800 Get Directions Write a Review

NPPES record last updated: August 5, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Aug 5, 2026, Aug 1, 2018 (2 updates tracked since 2018).

About Thornton Simnitt Dmd NPPES

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

THORNTON SIMNITT DMD (NPI 1922586932) is an individual general practice provider in Hillsboro, Oregon, licensed in Oregon (D11195) and active in the NPI registry since August 2018. He has opted out of Medicare through April 1, 2028.

NPPES Registry Identity

NPI1922586932
Entity TypeIndividualMale
Primary Taxonomy1223G0001X
Provider Legal NameTHORNTON SIMNITTCredential: DMD
Location Address2831 SE CORNELIUS PASS RDHillsboro, OR 97129-6752
Mailing Address2831 Se Cornelius Pass RdHillsboro, OR 97129-6752 · (503) 642-5800
Phone(503) 642-5800
Sole ProprietorNo
Enumeration DateAugust 1, 2018
Last NPPES UpdateAugust 5, 20262 updates tracked since enumeration
NPPES CertifiedAugust 5, 2026
✔ NPI 1922586932 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers
Taxonomy Code1223G0001X
License✔ Licensed in OR · D11195
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.
2831 SE CORNELIUS PASS RD, Hillsboro, OR 97129
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

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Opted out of Medicare

Thornton Simnitt Dmd has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from April 1, 2022 through April 1, 2028.

Opt-Out Effective DateApril 1, 2022
Opt-Out In Effect ThroughApril 1, 2028Opt-out affidavits renew automatically every two years unless cancelled

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 Thornton Simnitt's NPI number?

The NPI number for Thornton Simnitt is 1922586932. It was assigned to this individual provider in the NPPES registry on August 1, 2018.

Where is Thornton Simnitt located?

Thornton Simnitt practices at 2831 SE Cornelius Pass Rd, Hillsboro, OR 97129. The listed phone number is (503) 642-5800.

What is Thornton Simnitt's specialty?

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

Is Thornton Simnitt enrolled in Medicare?

No. Thornton Simnitt has opted out of Medicare through April 1, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

When was this NPI record last updated?

The NPPES record for Thornton Simnitt was last updated on August 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 25 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.