KAREN E O'BRIEN M.D.
NPI 1780623215
Obstetrics & Gynecology - Maternal & Fetal Medicine in South Weymouth, MA

Q: What is Karen O'brien's NPI number?

The NPI number for Karen O'brien is 1780623215. It was assigned to this individual provider in the NPPES registry on June 6, 2006.

Q: What is Karen O'brien's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Q: When was this NPI record last updated?

The NPPES record for Karen O'brien was last updated on October 19, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 06, 2006PECOS EnrolledAccepts Medicare Assignment

55 FOGG RD, SOUTH WEYMOUTH, MA 02190(781) 624-8000 Get Directions Write a Review

NPPES record last updated: October 19, 2023. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Karen E O'brien M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KAREN E O'BRIEN M.D. (NPI 1780623215) is an individual maternal & fetal medicine provider in South Weymouth, Massachusetts, licensed in Massachusetts (218797) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS, is affiliated with South Shore Hospital, and is a graduate of Georgetown University School Of Medicine (1996).

NPPES Registry Identity

NPI1780623215

Entity TypeIndividualFemale

Primary Taxonomy207VM0101X

Provider Legal NameKAREN E O'BRIENCredential: M.D.

Location Address55 FOGG RDSouth Weymouth, MA 02190-2432

Mailing Address330 Brookline AveBoston, MA 02215-5400 · (617) 667-4836

Phone(781) 624-8000

Sole ProprietorNo

Medical School CMSGeorgetown University School Of MedicineGraduated 1996

Enumeration DateJune 6, 2006

Last NPPES UpdateOctober 19, 2023

NPPES CertifiedOctober 19, 2023

✔ NPI 1780623215 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207VM0101X

License✔ Licensed in MA · 218797

Definition

An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.

55 FOGG RD, South Weymouth, MA 02190

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Karen E O'brien M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6406748227

PECOS Enrollment IDI20040326000773

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

South Shore Hospital

Acute Care Hospitals · South Weymouth, MA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220100

Location55 Fogg RoadSouth Weymouth, MA 02190 · Norfolk County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02190 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$144.11 typical visit price

range $63.72 – $189.86

Typical copayment $36.02 (range $15.93 – $47.46)

Most-billed visit code 99204

Established Patient

$78.84 typical visit price

range $21.07 – $155.29

Typical copayment $19.71 (range $5.26 – $38.82)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LINDA CASHMAN-BELTON R.D.

Dietitian, Registered

55 FOGG RD
WEYMOUTH, MA 02190

Norfolk County (781) 340-4293

DR. ARI CHARLES SACKS M.D.

Radiology (Diagnostic Radiology)

55 FOGG RD
WEYMOUTH, MA 02190

Norfolk County (781) 624-8000

OLIVIA SERPA

Dietitian, Registered

55 FOGG RD
WEYMOUTH, MA 02190

Norfolk County (781) 624-8935

MRS. PAULA L KENNEDY RDN

Dietitian, Registered

55 FOGG RD
SOUTH WEYMOUTH, MA 02190

Norfolk County (781) 624-7267

DONNA J HUDSON-BRYANT FNP-BC, PMHNP-BC

Nurse Practitioner (Psychiatric/Mental Health)

55 FOGG RD
WEYMOUTH, MA 02190

Norfolk County (781) 624-8000

DR. GABRIEL PARIS DO

Pediatrics

55 FOGG RD
S WEYMOUTH, MA 02190

Norfolk County (781) 624-8000

MELISSA MCPHERSON

Social Worker (Clinical)

55 FOGG RD
WEYMOUTH, MA 02190

Norfolk County (781) 624-3021

NKIRU SOFIA OGBUEFI

Student in an Organized Health Care Education/Training Program

55 FOGG RD
SOUTH WEYMOUTH, MA 02190

Norfolk County (781) 624-8000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Karen O'brien's NPI number?

The NPI number for Karen O'brien is 1780623215. It was assigned to this individual provider in the NPPES registry on June 6, 2006.

Where is Karen O'brien located?

Karen O'brien practices at 55 Fogg Rd, South Weymouth, MA 02190. The listed phone number is (781) 624-8000.

What is Karen O'brien's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Is Karen O'brien enrolled in Medicare?

Yes. Karen O'brien is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Karen O'brien accept?

Health plans from Anthem Blue Cross and Blue Shield list Karen O'brien as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Karen O'brien affiliated with any hospitals?

According to CMS data, Karen O'brien is affiliated with South Shore Hospital.

When was this NPI record last updated?

The NPPES record for Karen O'brien was last updated on October 19, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.