Dr. Elizabeth G. Obrien, MD
- Medicare services, 2024
- 643
- Medicare patients, 2024
- 623
- Part D claims, 2024
- 109
- MIPS score, 2024
- 87
- Hospital affiliations
- 1
- Practice address
- 55 Fogg Road, South Weymouth, MA 02190
- Practice phone
- Call (781) 340-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Elizabeth G. Obrien is an emergency medicine physician in South Weymouth, Massachusetts
Dr. Obrien practices at South Shore Hospital in South Weymouth, Massachusetts, part of South Shore Health System.
Dr. Obrien's NPI, 1922454560, was assigned on May 12, 2016. Dr. Obrien graduated from Yale University School of Medicine in 2016. Dr. Obrien holds Massachusetts license 283565.
- NPI
- 1922454560NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9931527017
- NPI enumeration date
- May 12, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (781) 340-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Elizabeth G. Obrien practices at South Shore Hospital in South Weymouth, Massachusetts
Dr. Obrien's primary practice is South Shore Hospital, at 55 Fogg Road, South Weymouth, MA 02190 in Norfolk County. The practice phone is (781) 340-8000.
- South Shore Hospital55 Fogg Road, South Weymouth, MA 02190 · Norfolk CountyPhone(781) 340-8000
Source: Dmand AI Affiliation Data
Dr. Elizabeth G. Obrien is affiliated with 1 site of care and 2 medical groups
Dr. Obrien's primary practice is South Shore Hospital in South Weymouth, Massachusetts, part of South Shore Health System. The medical group on file is Boston Children's Hospital. Dmand AI also links Dr. Obrien to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Elizabeth G. Obrien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Obrien practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| South Shore Hospital | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Elizabeth G. Obrien is one of 1,483 emergency medicine physicians in Massachusetts
Emergency medicine is Dr. Obrien's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Obrien is licensed in Massachusetts.
Specialties and state licenses
- Emergency medicine, MassachusettsPrimary
Emergency medicine physicians near Dr. Obrien
Counts of emergency medicine physicians 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. Elizabeth G. Obrien billed Medicare for 643 services in 2024
CMS data shows 643 Medicare services from Dr. Obrien across 3 procedure codes in 2024, for 623 Medicare patients. Medicare paid $91,445 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Obrien's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8262024: 64322%
Dr. Obrien compared with the Massachusetts median for emergency medicine physicians, 2024
- Dr. Obrien
- Massachusetts median
- Medicare services
- 643vs 34189% above
- Medicare patients
- 623vs 33785% above
- Part D claims
- 40vs 3611% above
Medians across 1,477 emergency medicine physicians in Massachusetts with Dmand AI profiles that report each measure.
Dr. Obrien's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Elizabeth G. Obrien treated 623 Medicare patients in 2024, average age 76
CMS counts 623 Medicare patients who saw Dr. Obrien in 2024. The largest group is 75 to 84, with 257 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 32% are also on Medicaid. Their average risk score is 2.16, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Obrien's median patient age at 57, with 55% women.
Dr. Obrien's Medicare patients by age, 2024
Dr. Obrien's Medicare patients by sex, 2024
- Women35156%
- Men27244%
Chronic conditions among Dr. Obrien's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis61%
- Anxiety54%
- Mood disorders49%
- Ischemic heart disease44%
- Depression43%
- Chronic kidney disease41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Obrien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Elizabeth G. Obrien wrote 109 Medicare Part D claims in 2024
In 2024, Dr. Obrien wrote 109 Medicare Part D claims for 80 patients. 92% of them were for generic drugs. CMS names the drug for 40 of them, across 3 drugs with 11 or more claims each, at $999 in total drug cost. In 2023, CMS named 60 claims across 4 drugs.
Dr. Obrien's Part D claims by kind of drug, 2024
- Generic100 claims92%
- Brand-name and other9 claims8%
Dr. Obrien's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Obrien's Part D claims, 2024
- Antibiotics38%41 of 109 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 602024: 4033%
Drugs named by CMS: 3 in 2024, 4 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Elizabeth G. Obrien scored 87 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Obrien for performance year 2024, reported as part of a group. Dr. Obrien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Obrien's MIPS scores, performance year 2024
- 87of 100Final score
- 88.1of 100Quality
- 71of 100Promoting Interoperability
- 40of 100Improvement Activities
- 78of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Elizabeth G. Obrien graduated from Yale University School of Medicine
Dr. Obrien graduated from Yale University School of Medicine in 2016.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Elizabeth G. Obrien'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (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)Clinician Public Reporting: Overall MIPS Performance (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. Elizabeth G. Obrien
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. Elizabeth G. Obrien's NPI number?
Dr. Elizabeth G. Obrien's NPI number is 1922454560. It was assigned on May 12, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Elizabeth G. Obrien?
Dr. Elizabeth G. Obrien is an emergency medicine physician in South Weymouth, Massachusetts. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Elizabeth G. Obrien practice?
Dr. Obrien practices at 55 Fogg Road, South Weymouth, MA 02190. Dr. Obrien's primary practice is South Shore Hospital in South Weymouth, Massachusetts, part of South Shore Health System. Dmand AI also links Dr. Obrien to 1 medical group.
What is Dr. Elizabeth G. Obrien's office phone number?
The practice phone on file for Dr. Obrien is (781) 340-8000.
What is Dr. Elizabeth G. Obrien's medical license number?
Dr. Obrien holds Massachusetts license 283565.
Which hospitals is Dr. Elizabeth G. Obrien affiliated with?
Dr. Obrien practices at South Shore Hospital in South Weymouth, Massachusetts.
What medical group is Dr. Elizabeth G. Obrien part of?
Dr. Obrien is linked to Boston Children's Hospital. Dmand AI links Dr. Obrien to 1 more medical group.
Does Dr. Elizabeth G. Obrien accept Medicare?
Yes. CMS data shows Dr. Obrien billed Medicare for 643 services in 2024, and Dr. Obrien accepts Medicare assignment.
What is Dr. Elizabeth G. Obrien's MIPS score?
Dr. Obrien's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.
How many Medicare patients does Dr. Elizabeth G. Obrien see?
CMS counts 623 Medicare patients who saw Dr. Obrien in 2024, with an average age of 76.
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What services does Dr. Elizabeth G. Obrien bill to Medicare?
In 2024, Dr. Obrien's most billed Medicare services were emergency department visit (99285), critical care (99291) and emergency department visit (99284).
Where did Dr. Elizabeth G. Obrien go to medical school?
Dr. Obrien graduated from Yale University School of Medicine in 2016.
What drugs does Dr. Elizabeth G. Obrien prescribe most?
In 2024 Medicare Part D data, Dr. Obrien's most prescribed drugs by claims were Prednisone, Cefpodoxime Proxetil and Azithromycin.
How long has Dr. Elizabeth G. Obrien been practicing?
Dr. Obrien graduated from medical school in 2016, 10 years ago.
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