Douglas Brennan, MD
NPI 1932580636 · Psychiatry Physician · Boston, MA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Brennan, MD is a Psychiatry Physician provider in Boston, MA (NPI 1932580636).
Provider details
- NPI number
- 1932580636
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 273440 (MA)
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
11 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
- 2015-06-18
- Last updated
- 2020-02-13
- Certified
- 2020-02-13
Frequently asked questions
- What is Douglas Brennan's NPI number?
- Douglas Brennan's National Provider Identifier (NPI) is 1932580636, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Brennan's specialty?
- Douglas Brennan is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Brennan located?
- Douglas Brennan's practice location on file with NPPES is Massachusetts General Hospital, Boston, MA 02114.
- What is Douglas Brennan's phone number?
- The practice phone number listed in the NPPES registry for Douglas Brennan is (617) 726-2066.
- Does Douglas Brennan accept Medicare?
- Douglas Brennan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Brennan's NPI active?
- Yes — Douglas Brennan's NPI (1932580636) is active in the NPPES registry as of the last update on 2020-02-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.