DR. NATHAN JAMES SIMARRO D.D.S.
NPI 1144637661
Dentist - Dental Public Health in Antioch, CA

Q: What is Nathan Simarro's NPI number?

The NPI number for Nathan Simarro is 1144637661. It was assigned to this individual provider in the NPPES registry on July 16, 2014.

Q: What is Nathan Simarro's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Dental Public Health, with taxonomy code 1223D0001X.

Q: When was this NPI record last updated?

The NPPES record for Nathan Simarro was last updated on February 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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 July 16, 2014PECOS Enrolled

5201 DEER VALLEY ROAD SUITE #3B, ANTIOCH, CA 94531(925) 723-9090 Get Directions Write a Review

NPPES record last updated: February 18, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Dr. Nathan James Simarro D.d.s. NPPES

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

DR. NATHAN JAMES SIMARRO D.D.S. (NPI 1144637661) is an individual dental public health provider in Antioch, California, licensed in California (63666) and active in the NPI registry since July 2014. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1144637661

Entity TypeIndividualMale

Primary Taxonomy1223D0001X

Provider Legal NameDR. NATHAN JAMES SIMARROCredential: D.D.S.

Location Address5201 DEER VALLEY ROAD SUITE #3BAntioch, CA 94531

Mailing Address5201 Deer Valley Road Suite #3bAntioch, CA 94531 · (925) 723-9090

Phone(925) 723-9090

Sole ProprietorYes

Enumeration DateJuly 16, 2014

Last NPPES UpdateFebruary 18, 2026

NPPES CertifiedFebruary 18, 2026

✔ NPI 1144637661 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyDentist · Dental Public HealthDental Providers

Taxonomy Code1223D0001X

License✔ Licensed in CA · 63666

Definition

The science and art of preventing and controlling dental diseases and promoting dental health through organized community efforts. It is that form of dental practice that serves the community as a patient rather than the individual. It is concerned with the dental health education of the public, with applied dental research, and with the administration of group dental care programs as well as the prevention and control of dental diseases on a community basis.

Also ListedDentistTaxonomy 122300000X · License 63666 (CA)

Also ListedDentist · General PracticeTaxonomy 1223G0001X · License 63666 (CA)

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Nathan James Simarro D.d.s. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94531 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$104.51 typical visit price

range $69.00 – $202.35

Typical copayment $26.12 (range $17.25 – $50.58)

Most-billed visit code 99203

Established Patient

$84.91 typical visit price

range $23.44 – $166.46

Typical copayment $21.22 (range $5.86 – $41.61)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Nathan Simarro's NPI number?

The NPI number for Nathan Simarro is 1144637661. It was assigned to this individual provider in the NPPES registry on July 16, 2014.

Where is Nathan Simarro located?

Nathan Simarro practices at 5201 Deer Valley Road Suite #3b, Antioch, CA 94531. The listed phone number is (925) 723-9090.

What is Nathan Simarro's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Dental Public Health, with taxonomy code 1223D0001X.

Is Nathan Simarro enrolled in Medicare?

Yes. Nathan Simarro is registered in the Medicare PECOS enrollment system.

What insurance does Nathan Simarro accept?

Health plans from Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and Blue Cross and Blue Shield of Texas list Nathan Simarro 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 Nathan Simarro was last updated on February 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.