Brennan O'Brien
NPI 1447577184 · General Practice Dentistry · Natchez, MS
Enrolled with Medicare as Order and Referring Only - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brennan O'Brien is a General Practice Dentistry provider in Natchez, MS (NPI 1447577184).
Provider details
- NPI number
- 1447577184
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Dental Providers
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin | 184 | 160 |
| Ibuprofen | 27 | 26 |
| Cephalexin | 22 | 18 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 17 | 16 |
| Fluconazole | 12 | — |
| Methylprednisolone | 12 | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-04-20
- Last updated
- 2018-07-02
Frequently asked questions
- What is Brennan O'Brien's NPI number?
- Brennan O'Brien's National Provider Identifier (NPI) is 1447577184, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brennan O'Brien's specialty?
- Brennan O'Brien is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is Brennan O'Brien located?
- Brennan O'Brien's practice location on file with NPPES is 317 Highland Blvd Ste C, Natchez, MS 39120.
- What is Brennan O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Brennan O'Brien is (601) 445-8904.
- Does Brennan O'Brien accept Medicare?
- Brennan O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brennan O'Brien's NPI active?
- Yes — Brennan O'Brien's NPI (1447577184) is active in the NPPES registry as of the last update on 2018-07-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.