Dr. Karen E. O'Brien, MD
- Part D claims, 2016
- 64
- Hospital affiliations
- 2
- Industry payments
- $1,516
- Medical groups
- 4
- State license
- 1
- Practice address
- 330 Brookline Avenue, Boston, MA 02215
- Practice phone
- Call (617) 667-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. O'Brien's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Karen E. O'Brien is a maternal-fetal medicine specialist in Boston, Massachusetts
Dr. O'Brien practices at Beth Israel Deaconess Medical Center in Boston, Massachusetts, part of Beth Israel Lahey Health.
Dr. O'Brien's NPI, 1780623215, was assigned on June 6, 2006. Dr. O'Brien graduated from Georgetown University School of Medicine in 1996. Dr. O'Brien holds Massachusetts license 218797.
- NPI
- 1780623215NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6406748227
- NPI enumeration date
- June 6, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 667-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Karen E. O'Brien practices at Beth Israel Deaconess Medical Center in Boston, Massachusetts
Dr. O'Brien's primary practice is Beth Israel Deaconess Medical Center, at 330 Brookline Avenue, Boston, MA 02215 in Suffolk County. The practice phone is (617) 667-7000.
- Beth Israel Deaconess Medical Center330 Brookline Avenue, Boston, MA 02215 · Suffolk CountyPhone(617) 667-7000
Source: Dmand AI Affiliation Data
Dr. Karen E. O'Brien is affiliated with 2 sites of care and 4 medical groups
Dr. O'Brien's primary practice is Beth Israel Deaconess Medical Center in Boston, Massachusetts, part of Beth Israel Lahey Health. Dr. O'Brien is also affiliated with South Shore Hospital. The medical group on file is South Shore Medical Center. Dmand AI also links Dr. O'Brien to 3 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Karen E. O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Brien practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Beth Israel Deaconess Medical Center | Available with a free account |
| +1 more site and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Beth Israel Lahey Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Karen E. O'Brien is one of 79 maternal-fetal medicine specialists in Massachusetts
Maternal and fetal medicine is Dr. O'Brien's primary specialty in the NPI Registry, under taxonomy code 207VM0101X. Dr. O'Brien is licensed in Massachusetts.
Specialties and state licenses
- Maternal and fetal medicine, MassachusettsPrimary
Maternal-fetal medicine specialists near Dr. O'Brien
Counts of maternal-fetal medicine specialists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Karen E. O'Brien's patients have a median age of 34
Across all payers, Dmand AI patient panel data puts Dr. O'Brien's median patient age at 34, with 98% women.
Dr. O'Brien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 34
Patient panel by sex, all payers
- Women98%
- Men1%
Source: Dmand AI Patient Panel Data
Dr. Karen E. O'Brien wrote 64 Medicare Part D claims in 2016
In 2016, Dr. O'Brien wrote 64 Medicare Part D claims. They cover 4 drugs, with $581 in total drug cost.
Dr. O'Brien's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Karen E. O'Brien takes part in Medicare
Dr. O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Karen E. O'Brien received $1,516 in industry payments from 2016 to 2025
CMS Open Payments shows 7 general payments to Dr. O'Brien from 5 drug and device companies from 2016 to 2025. Travel and lodging make up the largest share, 92% of the total. Pfizer Inc. paid the most, $1,446.
General payments to Dr. O'Brien by program year, 2016 to 2025
General payments to Dr. O'Brien by kind, 2016 to 2025
- Travel and lodging$1,39192%
- Food and beverage$1258%
Companies that paid Dr. O'Brien the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Karen E. O'Brien graduated from Georgetown University School of Medicine
Dr. O'Brien graduated from Georgetown University School of Medicine in 1996.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Karen E. O'Brien's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Karen E. O'Brien
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Karen E. O'Brien's NPI number?
Dr. Karen E. O'Brien's NPI number is 1780623215. It was assigned on June 6, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Karen E. O'Brien?
Dr. Karen E. O'Brien is a maternal-fetal medicine specialist in Boston, Massachusetts. The primary specialty in the NPI Registry is Maternal & Fetal Medicine Physician (taxonomy code 207VM0101X).
Where does Dr. Karen E. O'Brien practice?
Dr. O'Brien practices at 330 Brookline Avenue, Boston, MA 02215. Dr. O'Brien's primary practice is Beth Israel Deaconess Medical Center in Boston, Massachusetts, part of Beth Israel Lahey Health. Dmand AI also links Dr. O'Brien to 3 medical groups.
What is Dr. Karen E. O'Brien's office phone number?
The practice phone on file for Dr. O'Brien is (617) 667-7000.
What is Dr. Karen E. O'Brien's medical license number?
Dr. O'Brien holds Massachusetts license 218797.
Which hospitals is Dr. Karen E. O'Brien affiliated with?
Dr. O'Brien practices at Beth Israel Deaconess Medical Center in Boston, Massachusetts. Dr. O'Brien is also affiliated with South Shore Hospital.
What medical group is Dr. Karen E. O'Brien part of?
Dr. O'Brien is linked to South Shore Medical Center. Dmand AI links Dr. O'Brien to 3 more medical groups.
Does Dr. Karen E. O'Brien accept Medicare?
Yes. CMS lists Dr. O'Brien as accepting Medicare assignment.
Where did Dr. Karen E. O'Brien go to medical school?
Dr. O'Brien graduated from Georgetown University School of Medicine in 1996.
What drugs does Dr. Karen E. O'Brien prescribe most?
In 2016 Medicare Part D data, Dr. O'Brien's most prescribed drugs by claims were Mirtazapine, Citalopram HBr and Trazodone HCl.
Has Dr. Karen E. O'Brien received payments from drug or device companies?
CMS Open Payments shows $1,516 in general payments to Dr. O'Brien from 5 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Karen E. O'Brien been practicing?
Dr. O'Brien graduated from medical school in 1996, 30 years ago.
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