1. Home
  2. Directory
  3. Mississippi
  4. Natchez
  5. Dentist
  6. NPI Profile

DR. BRENNAN THOMAS O'BRIEN I
NPI 1447577184
Dentist - General Practice in Natchez, MS

Active since April 20, 2010PECOS Enrolled
317 HIGHLAND BLVD STE C, NATCHEZ, MS 39120(601) 445-8904(601) 897-4204 Get Directions Write a Review

NPPES record last updated: July 2, 2018. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Brennan Thomas O'brien I NPPES

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

DR. BRENNAN THOMAS O'BRIEN I (NPI 1447577184) is an individual general practice provider in Natchez, Mississippi, licensed in Mississippi (3610-11) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1447577184
Entity TypeIndividualMale
Primary Taxonomy1223G0001X
Provider Legal NameDR. BRENNAN THOMAS O'BRIEN I
Location Address317 HIGHLAND BLVD STE CNatchez, MS 39120
Mailing Address113 Overton RdNatchez, MS 39120-5246 · (225) 229-6946
Phone(601) 445-8904
Fax(601) 897-4204
Sole ProprietorNo
Enumeration DateApril 20, 2010
Last NPPES UpdateJuly 2, 2018
✔ NPI 1447577184 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyDentist · General PracticeDental Providers
Taxonomy Code1223G0001X
License✔ Licensed in MS · 3610-11
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.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
317 HIGHLAND BLVD STE C, Natchez, MS 39120
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Guardian, Humana.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. Brennan Thomas O'brien I 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 39120 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
$80.50 typical visit price
range $51.65 – $159.18
Typical copayment $20.12 (range $12.91 – $39.79)
Most-billed visit code 99203
Established Patient
$64.96 typical visit price
range $16.15 – $129.61
Typical copayment $16.24 (range $4.03 – $32.40)
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.

Other Providers at the Same Location NPPES

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

BITESIZE SMILES, LLC
Dentist
317 HIGHLAND BLVD STE C
NATCHEZ, MS 39120
Adams County (601) 443-1541

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 Brennan O'brien's NPI number?

The NPI number for Brennan O'brien is 1447577184. It was assigned to this individual provider in the NPPES registry on April 20, 2010.

Where is Brennan O'brien located?

Brennan O'brien practices at 317 Highland Blvd Ste C, Natchez, MS 39120. The listed phone number is (601) 445-8904.

What is Brennan O'brien's specialty?

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

Is Brennan O'brien enrolled in Medicare?

Yes. Brennan O'brien is registered in the Medicare PECOS enrollment system.

What insurance does Brennan O'brien accept?

Health plans from Guardian and Humana list Brennan O'brien 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 Brennan O'brien was last updated on July 2, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.