Thomas Brennan, M.D.
NPI 1720059405 · Diagnostic Radiology Physician · Owings Mills, MD
Thomas Brennan, M.D. is a Diagnostic Radiology Physician provider in Owings Mills, MD (NPI 1720059405).
Provider details
- NPI number
- 1720059405
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D0012843 (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
- 2006-01-30
- Last updated
- 2008-03-18
Frequently asked questions
- What is Thomas Brennan's NPI number?
- Thomas Brennan's National Provider Identifier (NPI) is 1720059405, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Brennan's specialty?
- Thomas Brennan is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Brennan located?
- Thomas Brennan's practice location on file with NPPES is 21 Crossroads Dr, Owings Mills, MD 21117-5441.
- What is Thomas Brennan's phone number?
- The practice phone number listed in the NPPES registry for Thomas Brennan is (410) 356-8186.
- Is Thomas Brennan's NPI active?
- Yes — Thomas Brennan's NPI (1720059405) is active in the NPPES registry as of the last update on 2008-03-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.