Gary O'Brien, D.D.S.
NPI 1477729747 · Dentist · Glendale, CA
Gary O'Brien, D.D.S. is a Dentist provider in Glendale, CA (NPI 1477729747).
Provider details
- NPI number
- 1477729747
- Entity type
- Individual
- Primary specialty
- DentistDental Providers
- Credential
- D.D.S.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 29639 (CA)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% 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 · 1 distinct drug on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 21 | 17 |
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 no Part D record, 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
- 2008-05-06
- Last updated
- 2008-05-06
Frequently asked questions
- What is Gary O'Brien's NPI number?
- Gary O'Brien's National Provider Identifier (NPI) is 1477729747, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary O'Brien's specialty?
- Gary O'Brien is listed in the NPPES registry with a primary specialty of Dentist (Dental Providers).
- Where is Gary O'Brien located?
- Gary O'Brien's practice location on file with NPPES is 411 N Central Ave, Glendale, CA 91203-2081.
- What is Gary O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Gary O'Brien is (818) 956-0639.
- Is Gary O'Brien's NPI active?
- Yes — Gary O'Brien's NPI (1477729747) is active in the NPPES registry as of the last update on 2008-05-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.