Elisa A. O'Brien, APRN
- Medicare patients, 2024
- 66
- MIPS score, 2024
- 100
- Hospital affiliations
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 5 Perryridge Rd, Greenwich, CT 06830
- Practice phone
- Call (203) 863-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Elisa 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.
Elisa A. O'Brien is a family nurse practitioner in Greenwich, Connecticut
Elisa O'Brien practices at Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System.
Elisa O'Brien's NPI, 1912262973, was assigned on July 5, 2012. Elisa O'Brien holds Connecticut license 004842.
- NPI
- 1912262973NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274799713
- NPI enumeration date
- July 5, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 863-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Elisa A. O'Brien practices at Greenwich Hospital in Greenwich, Connecticut
Elisa O'Brien's primary practice is Greenwich Hospital, at 5 Perryridge Rd, Greenwich, CT 06830 in Fairfield County. The practice phone is (203) 863-3000.
- Greenwich Hospital5 Perryridge Rd, Greenwich, CT 06830 · Fairfield CountyPhone(203) 863-3000
Source: Dmand AI Affiliation Data
Elisa A. O'Brien is affiliated with 1 site of care and 1 medical group
Elisa O'Brien's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. The medical group on file is Northeast Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Elisa A. O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Elisa O'Brien practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greenwich Hospital | 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 Yale New Haven Health System and 6.2K+ hospitals, with verified contacts in the same login.
Elisa A. O'Brien is one of 2,105 family nurse practitioners in Connecticut
Family is Elisa O'Brien's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Elisa O'Brien is licensed in Connecticut.
Specialties and state licenses
- Family nurse practitioner, ConnecticutPrimary
Family nurse practitioners near Elisa O'Brien
Counts of family nurse practitioners 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
Elisa A. O'Brien treated 66 Medicare patients in 2024, average age 86
CMS counts 66 Medicare patients who saw Elisa O'Brien in 2024. The largest group is 85 and over, with 36 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 24% are also on Medicaid. Their average risk score is 3.53, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Elisa O'Brien's median patient age at 88, with 67% women.
Elisa O'Brien's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Elisa O'Brien's Medicare patients by sex, 2024
- Women3045%
- Men3655%
Chronic conditions among Elisa O'Brien's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Alzheimer's and dementia70%
- Atrial fibrillation58%
- Arthritis56%
- Heart failure55%
- Anxiety53%
- Chronic kidney disease53%
Share of Medicare patients with each condition. A patient can have several.
Elisa 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 88
Patient panel by sex, all payers
- Women67%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Elisa A. O'Brien scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Elisa O'Brien for performance year 2024, reported through an alternative payment model (APM). Elisa O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Elisa O'Brien's MIPS scores, performance year 2024
- 100of 100Final score
- 86.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
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
Sources for Elisa A. 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 DataMedicare Physician & Other Practitioners - 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) |
| 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 Elisa A. 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 Elisa A. O'Brien's NPI number?
Elisa A. O'Brien's NPI number is 1912262973. It was assigned on July 5, 2012, and it is active in the NPI Registry.
What does Elisa A. O'Brien specialize in?
Elisa A. O'Brien is a family nurse practitioner in Greenwich, Connecticut. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Elisa A. O'Brien practice?
Elisa O'Brien practices at 5 Perryridge Rd, Greenwich, CT 06830. Elisa O'Brien's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System.
What is Elisa A. O'Brien's office phone number?
The practice phone on file for Elisa O'Brien is (203) 863-3000.
What is Elisa A. O'Brien's medical license number?
Elisa O'Brien holds Connecticut license 004842.
Which hospitals is Elisa A. O'Brien affiliated with?
Elisa O'Brien practices at Greenwich Hospital in Greenwich, Connecticut.
What medical group is Elisa A. O'Brien part of?
Elisa O'Brien is linked to Northeast Medical Group.
Does Elisa A. O'Brien accept Medicare?
Yes. CMS lists Elisa O'Brien as accepting Medicare assignment.
What is Elisa A. O'Brien's MIPS score?
Elisa O'Brien's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Elisa A. O'Brien see?
CMS counts 66 Medicare patients who saw Elisa O'Brien in 2024, with an average age of 86.
How long has Elisa A. O'Brien been practicing?
Elisa O'Brien graduated from medical school in 2011, 15 years ago.
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