Kathryn P. O'Brien
Family Nurse Practitioner · Salem, MA
Kathryn P. O'Brien is a family nurse practitioner with a practice address in Salem, Massachusetts, and NPI 1811472426, issued on Sep 28, 2018. Check the license (Massachusetts RN2318509, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Kathryn P. O'Brien
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- RN2318509 MA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Highland Ave Ste 1, Salem, MA 01970
- Phone
- (978) 741-9500
- Enumerated
- Sep 28, 2018
- Record last updated
- Sep 13, 2024
- Medicare enrollment
- Enrolled (PECOS I20190103000289); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,724 in Massachusetts → Look up another NPI →
Also registered at 400 Highland Ave Ste 1
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Beenish Furquan, MDInternal Medicine Physician1730665712
- Faris Ghannam, MDInternal Medicine Physician1669049904
- Kristen Kanoff, CNPNurse Practitioner1831810084
- Yasmine SabriAmbulatory Care Registered Nurse1922940303
Verify Kathryn P. O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN2318509Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.1 times the Medicare Part D claims of the average family nurse practitioner in 2024
4,089 Medicare Part D claims for 1,046 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 45 claims were for opioids.
Most prescribed
- Atorvastatin Calcium370 claims
- Amlodipine Besylate217 claims
- Lisinopril180 claims
- Omeprazole177 claims
- Levothyroxine Sodium164 claims
- Metoprolol Succinate146 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Mass General Brigham Medical Group Northern Massachusetts IncSalem, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kathryn P. O'Brien among 4,724 family nurse practitioner records in Massachusetts
Kathryn P. O'Brien is one of 4,724 family nurse practitioner records with a practice address in Massachusetts. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 49% of them.
- NPI issued2018 · 49% of these records are older, 46% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2018 · median 2019 among the 2,704 with a school on file
- Record last updated2024 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
45 family nurse practitioner records list a practice address in Salem
They are 45 of the 1,869 NPPES records with a practice address in Salem, and 4,724 family nurse practitioner records in Massachusetts.
All 4,724 in Massachusetts → Every provider in Salem → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Elizabeth Bartlett, NPSalem, MA 019701306865829
- Krista Chavez, RN, FNPSalem, MA 019701932352895
- Kathleen Corrigan, NPSalem, MA 019701487845608
- Jennifer Femino, NPSalem, MA 019701548301922
- Ashley Herr, RN, MS, FNP-BCSalem, MA 019701861782534
- Harriet Kasozi, FNPSalem, MA 019701770777963
- Christine Malagrida, NPSalem, MA 019701205977154
- Shayla McCarthy, N.PSalem, MA 019701457608713
Common questions
What is Kathryn P. O'Brien's NPI number?
Kathryn P. O'Brien's National Provider Identifier (NPI) is 1811472426, issued on Sep 28, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Kathryn P. O'Brien located?
The NPPES record lists a practice address at 400 Highland Ave Ste 1, Salem, MA, 01970. Phone: (978) 741-9500. Providers update this record themselves, so call before visiting.
How can I verify Kathryn P. O'Brien's license?
NPPES lists Massachusetts license number RN2318509, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Kathryn P. O'Brien prescribe under Medicare Part D?
In 2024, Kathryn P. O'Brien had 4,089 Medicare Part D claims for 1,046 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.