Brett Cassidy, MD
NPI 1255126520 · Anatomic Pathology & Clinical Pathology Physician · Boston, MA
Brett Cassidy, MD is a Anatomic Pathology & Clinical Pathology Physician provider in Boston, MA (NPI 1255126520).
Provider details
- NPI number
- 1255126520
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 3018209 (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
1 yr 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
- 2025-04-09
- Last updated
- 2025-04-09
- Certified
- 2025-03-24
Frequently asked questions
- What is Brett Cassidy's NPI number?
- Brett Cassidy's National Provider Identifier (NPI) is 1255126520, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brett Cassidy's specialty?
- Brett Cassidy is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Brett Cassidy located?
- Brett Cassidy's practice location on file with NPPES is 75 Francis Street, Boston, MA 02115.
- What is Brett Cassidy's phone number?
- The practice phone number listed in the NPPES registry for Brett Cassidy is (617) 732-7510.
- Is Brett Cassidy's NPI active?
- Yes — Brett Cassidy's NPI (1255126520) is active in the NPPES registry as of the last update on 2025-04-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.