IndividualActive
Karen O'Brien, M.D.
NPI 1780623215 · Maternal & Fetal Medicine Physician · South Weymouth, MA
Provider details
- NPI number
- 1780623215
- Entity type
- Individual
- Primary specialty
- Maternal & Fetal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 218797 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(100/100 index)
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
3 documented practice locations
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
55 Fogg Rd
South Weymouth, MA 02190-2432
Phone: (781) 624-8000
Street-level locationGet directions
Mailing address
330 Brookline Ave
Boston, MA 02215-5400
Additional practice locations (2)
- 330 Brookline AveBoston, MA 02215-5400Phone: (617) 667-4836
- 51 Performance DrWeymouth, MA 02189-3141Phone: (781) 624-8000
Registry dates
- Enumerated
- 2006-06-06
- Last updated
- 2023-10-19
- Certified
- 2023-10-19
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.