Erin Mary O'Brien, FNP-C
Family Nurse Practitioner · North Andover, MA
Erin Mary O'Brien, FNP-C is a family nurse practitioner with a practice address in North Andover, Massachusetts, and NPI 1225680747, issued on Jul 15, 2019. Check the license (Massachusetts RN2320796, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Erin Mary O'Brien
- Credential
- FNP-C
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- RN2320796 MA
Self-reported in NPPES; status is on the state search - Practice location
- 231 Sutton St Ste 1A, North Andover, MA 01845
- Phone
- (978) 655-1042
- Enumerated
- Jul 15, 2019
- Record last updated
- Oct 2, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20250428002895); 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 →
Verify Erin Mary 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 RN2320796Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Simon Faynzilberg MD PCNewburyport, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Erin Mary O'Brien among 4,724 family nurse practitioner records in Massachusetts
Erin Mary O'Brien, FNP-C 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 2019, is newer than 54% of them.
- NPI issued2019 · 54% of these records are older, 40% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2019 · median 2019 among the 2,704 with a school on file
- Record last updated2019 · 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).
37 family nurse practitioner records list a practice address in North Andover
They are 37 of the 840 NPPES records with a practice address in North Andover, and 4,724 family nurse practitioner records in Massachusetts.
All 4,724 in Massachusetts → Every provider in North Andover → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Leslie Allen, FNP-BCNorth Andover, MA 018451154706240
- Shannon Arciero, NPNorth Andover, MA 018451639623895
- Nicole Burgett-Yandow, NPNorth Andover, MA 018451366749673
- Catherine Chambers, MSN, FNPNorth Andover, MA 018451447339775
- Elaine Ferreira, FNPNorth Andover, MA 018451861809261
- Dianna Gormley, CNPNorth Andover, MA 018451043688195
- Amy McCarthyNorth Andover, MA 018451659748515
- Robin McKinley, NPNorth Andover, MA 018451285971705
Common questions
What is Erin Mary O'Brien, FNP-C's NPI number?
Erin Mary O'Brien, FNP-C's National Provider Identifier (NPI) is 1225680747, issued on Jul 15, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Erin Mary O'Brien, FNP-C located?
The NPPES record lists a practice address at 231 Sutton St Ste 1A, North Andover, MA, 01845. Phone: (978) 655-1042. Providers update this record themselves, so call before visiting.
How can I verify Erin Mary O'Brien, FNP-C's license?
NPPES lists Massachusetts license number RN2320796, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity 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.