Brennan Thomas O'Brien
General Practice Dentistry · Natchez, MS
Brennan Thomas O'Brien is a general practice dentistry with a practice address in Natchez, Mississippi, and NPI 1447577184, issued on Apr 20, 2010. Check the license (Mississippi 3610-11, as entered in NPPES) with the Mississippi board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Brennan Thomas O'Brien
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 3610-11 MS
Self-reported in NPPES; status is on the state search - Practice location
- 317 Highland Blvd Ste C, Natchez, MS 39120
- Phone
- (601) 445-8904
- Enumerated
- Apr 20, 2010
- Record last updated
- Jul 2, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (601) 897-4204
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 845 in Mississippi → Look up another NPI →
Verify Brennan Thomas O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Mississippi board licenses this profession
Search for license 3610-11Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.6 times the Medicare Part D claims of the average general practice dentistry in 2024
301 Medicare Part D claims for 203 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Amoxicillin184 claims
- Ibuprofen27 claims
- Cephalexin22 claims
- Amoxicillin-Clavulanate Potass17 claims
- Fluconazole12 claims
- Methylprednisolone12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Brennan Thomas O'Brien among 845 general practice dentistry records in Mississippi
Brennan Thomas O'Brien is one of 845 general practice dentistry records with a practice address in Mississippi. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 36% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2018 · 74% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a Mississippi practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 general practice dentistry records list a practice address in Natchez
They are 7 of the 321 NPPES records with a practice address in Natchez, and 845 general practice dentistry records in Mississippi.
All 845 in Mississippi → Every provider in Natchez → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- John Carlton, D.M.D.Natchez, MS 391201245466242
- William Dickey, D.M.D.Natchez, MS 391201790857175
- Emily Hall, DDSNatchez, MS 391201770241465
- Carrie Iles, D.D.S.Natchez, MS 391201679663041
- Bruce Scarborough, D.M.D.Natchez, MS 391201326265463
- Benny Wright, DDSNatchez, MS 391201790770220
- Caroll Pierce, DMDMt Olive, MS 391191447304324
- Kara Alford, DMDMorton, MS 391171508951286
Common questions
What is Brennan Thomas O'Brien's NPI number?
Brennan Thomas O'Brien's National Provider Identifier (NPI) is 1447577184, issued on Apr 20, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Brennan Thomas O'Brien located?
The NPPES record lists a practice address at 317 Highland Blvd Ste C, Natchez, MS, 39120. Phone: (601) 445-8904. Providers update this record themselves, so call before visiting.
How can I verify Brennan Thomas O'Brien's license?
NPPES lists Mississippi license number 3610-11, as entered by the provider. Search the Mississippi board that licenses this profession; the NPPES record confirms identity only.
How much does Brennan Thomas O'Brien prescribe under Medicare Part D?
In 2024, Brennan Thomas O'Brien had 301 Medicare Part D claims for 203 beneficiaries; the average among general practice dentistry prescribers was 83. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.