Kathryn P. O'Brien
- Medicare patients, 2024
- 442
- Part D claims, 2024
- 4,089
- Hospital affiliations
- 2
- Industry payments
- $104
- Medical group
- 1
- Practice address
- 81 Highland Ave, Salem, MA 01970
- Practice phone
- Call (978) 354-2065
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
MGB Salem Hospital
Salem, Massachusetts
Find Kathryn 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.
Kathryn P. O'Brien is a family nurse practitioner in Salem, Massachusetts
Kathryn O'Brien practices at MGB Salem Hospital in Salem, Massachusetts.
Kathryn O'Brien's NPI, 1811472426, was assigned on September 28, 2018. Kathryn O'Brien holds Massachusetts license RN2318509.
- NPI
- 1811472426NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890030357
- NPI enumeration date
- September 28, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (978) 354-2065
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Kathryn P. O'Brien practices at MGB Salem Hospital in Salem, Massachusetts
Kathryn O'Brien's primary practice is MGB Salem Hospital, at 81 Highland Ave, Salem, MA 01970 in Essex County. The practice phone is (978) 354-2065.
- MGB Salem Hospital81 Highland Ave, Salem, MA 01970 · Essex CountyPhone(978) 354-2065
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Kathryn P. O'Brien is affiliated with 4 sites of care and 1 medical group
Kathryn O'Brien's primary practice is MGB Salem Hospital in Salem, Massachusetts. Kathryn O'Brien is also affiliated with Salem Hospital. The medical group on file is Mass General Brigham (formerly North Shore Physicians Group). Dmand AI also links Kathryn O'Brien to 1 more hospital and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Kathryn P. O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Kathryn O'Brien practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MGB Salem Hospital | Available with a free account |
| +3 more affiliated sites | 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 each health system and 6.2K+ hospitals, with verified contacts in the same login.
Kathryn P. O'Brien is one of 3,644 family nurse practitioners in Massachusetts
Family is Kathryn O'Brien's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Kathryn O'Brien is licensed in Massachusetts.
Specialties and state licenses
- Family nurse practitioner, MassachusettsPrimary
Family nurse practitioners near Kathryn 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
Kathryn P. O'Brien treated 442 Medicare patients in 2024, average age 74
CMS counts 442 Medicare patients who saw Kathryn O'Brien in 2024. The largest group is 65 to 74, with 175 patients. 64% of them have high cholesterol, and 62% have high blood pressure. 17% are also on Medicaid. Their average risk score is 1.13, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Kathryn O'Brien's median patient age at 72, with 60% women.
Kathryn O'Brien's Medicare patients by age, 2024
Kathryn O'Brien's Medicare patients by sex, 2024
- Women33676%
- Men10624%
Chronic conditions among Kathryn O'Brien's Medicare patients, 2024
- High cholesterol64%
- High blood pressure62%
- Arthritis47%
- Anxiety30%
- Mood disorders30%
- Depression27%
- Osteoporosis25%
- Chronic kidney disease24%
Share of Medicare patients with each condition. A patient can have several.
Kathryn 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 72
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Kathryn P. O'Brien wrote 4,089 Medicare Part D claims in 2024
In 2024, Kathryn O'Brien wrote 4,089 Medicare Part D claims for 1,046 patients. 88% of them were for generic drugs.
Kathryn O'Brien's Part D claims by kind of drug, 2024
- Generic3,592 claims88%
- Brand-name473 claims12%
- Other24 claims1%
Drug classes CMS tracks in Kathryn O'Brien's Part D claims, 2024
- Opioids1%45 of 4,089 claims
- Antibiotics3%115 of 4,089 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Kathryn P. O'Brien offers telehealth to Medicare patients
Kathryn O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Kathryn O'Brien as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Kathryn P. O'Brien received $104 in industry payments in 2025
CMS Open Payments shows 1 general payment to Kathryn O'Brien from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $104.
Companies that paid Kathryn O'Brien the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Kathryn P. 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| Part D prescribing | 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) |
| Industry payments | Open Payments (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 Kathryn P. 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 Kathryn P. O'Brien's NPI number?
Kathryn P. O'Brien's NPI number is 1811472426. It was assigned on September 28, 2018, and it is active in the NPI Registry.
What does Kathryn P. O'Brien specialize in?
Kathryn P. O'Brien is a family nurse practitioner in Salem, Massachusetts. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Kathryn P. O'Brien practice?
Kathryn O'Brien practices at 81 Highland Ave, Salem, MA 01970. Kathryn O'Brien's primary practice is MGB Salem Hospital in Salem, Massachusetts. Dmand AI also links Kathryn O'Brien to 1 hospital and 1 group practice or clinic.
What is Kathryn P. O'Brien's office phone number?
The practice phone on file for Kathryn O'Brien is (978) 354-2065.
What is Kathryn P. O'Brien's medical license number?
Kathryn O'Brien holds Massachusetts license RN2318509.
Which hospitals is Kathryn P. O'Brien affiliated with?
Kathryn O'Brien is affiliated with Salem Hospital. Dmand AI links Kathryn O'Brien to 1 more hospital.
What medical group is Kathryn P. O'Brien part of?
Kathryn O'Brien is linked to Mass General Brigham (formerly North Shore Physicians Group).
Does Kathryn P. O'Brien accept Medicare?
Yes. CMS lists Kathryn O'Brien as accepting Medicare assignment.
Does Kathryn P. O'Brien offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Kathryn O'Brien as offering telehealth services.
How many Medicare patients does Kathryn P. O'Brien see?
CMS counts 442 Medicare patients who saw Kathryn O'Brien in 2024, with an average age of 74.
Has Kathryn P. O'Brien received payments from drug or device companies?
CMS Open Payments shows $104 in general payments to Kathryn O'Brien from 1 company from 2025 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Kathryn P. O'Brien been practicing?
Kathryn O'Brien graduated from medical school in 2018, 8 years ago.
Selling to family practices?
See family nurse practitioners in Massachusetts by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card