Daniel O'Brien, D.M.D.
NPI 1588856991 · General Practice Dentistry · Marlborough, MA
Daniel O'Brien, D.M.D. is a General Practice Dentistry provider in Marlborough, MA (NPI 1588856991).
Provider details
- NPI number
- 1588856991
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Credential
- D.M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 17502 (MA)
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 | 28 | 20 |
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
- 2007-08-10
- Last updated
- 2007-08-10
Frequently asked questions
- What is Daniel O'Brien's NPI number?
- Daniel O'Brien's National Provider Identifier (NPI) is 1588856991, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Daniel O'Brien's specialty?
- Daniel O'Brien is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is Daniel O'Brien located?
- Daniel O'Brien's practice location on file with NPPES is 340 Maple St, Marlborough, MA 01752-3200.
- What is Daniel O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Daniel O'Brien is (508) 481-0110.
- Is Daniel O'Brien's NPI active?
- Yes — Daniel O'Brien's NPI (1588856991) is active in the NPPES registry as of the last update on 2007-08-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.