Thomas Obrien, M.D.
NPI 1912946765 · Neonatal-Perinatal Medicine Physician · Baltimore, MD
Enrolled with Medicare as Order and Referring Only - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Obrien, M.D. is a Neonatal-Perinatal Medicine Physician provider in Baltimore, MD (NPI 1912946765).
Provider details
- NPI number
- 1912946765
- Entity type
- Individual
- Primary specialty
- Neonatal-Perinatal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- D0040362 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-06
- Last updated
- 2007-07-08
Frequently asked questions
- What is Thomas Obrien's NPI number?
- Thomas Obrien's National Provider Identifier (NPI) is 1912946765, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Obrien's specialty?
- Thomas Obrien is listed in the NPPES registry with a primary specialty of Neonatal-Perinatal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Obrien located?
- Thomas Obrien's practice location on file with NPPES is 2401 W Belvedere Ave, Baltimore, MD 21215-5216.
- What is Thomas Obrien's phone number?
- The practice phone number listed in the NPPES registry for Thomas Obrien is (410) 601-5217.
- Does Thomas Obrien accept Medicare?
- Thomas Obrien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Obrien's NPI active?
- Yes — Thomas Obrien's NPI (1912946765) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.