NPPES file of Aug 9, 2026

Caroline Elizabeth O'Brien, FNP-C

Family Nurse Practitioner · Medford, MA

Caroline Elizabeth O'Brien, FNP-C is a family nurse practitioner with a practice address in Medford, Massachusetts, and NPI 1124828801, issued on Mar 13, 2025. Check the license (Massachusetts RN2333758, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1124828801
Name
Caroline Elizabeth O'Brien
Credential
FNP-C
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License numbers
RN2333758 MA
093013-21S NH
Self-reported in NPPES; status is on the state search
Practice location
22 Franklin St, Medford, MA 02155
Phone
(781) 350-8571
Enumerated
Mar 13, 2025
Record last updated
Mar 12, 2026
Medicare enrollment
Enrolled (PECOS I20260114002137); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest family nurse practitioner records → All 4,724 in Massachusetts → Look up another NPI →

Verify Caroline Elizabeth O'Brien in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
    Search for license RN2333758    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Bills Medicare through one group practice

  1. Beth Israel Lahey Health Primary Care, IncSouth Hamilton, MA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Caroline Elizabeth O'Brien among 4,724 family nurse practitioner records in Massachusetts

Caroline Elizabeth 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 2025, is newer than 92% of them.

  • NPI issued2025 · 92% of these records are older, 3% newer
  • In a Medicare fileYes · 71% of these records are
  • In the CMS Doctors and Clinicians fileYes · 57% of these records are
  • Graduated2024 · median 2019 among the 2,704 with a school on file
  • Record last updated2026 · 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).

27 family nurse practitioner records list a practice address in Medford

They are 27 of the 1,090 NPPES records with a practice address in Medford, and 4,724 family nurse practitioner records in Massachusetts.

All 4,724 in Massachusetts → Every provider in Medford → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Emmanuel Agbottah, FNPMedford, MA 021551376977199
  2. Kristen Camara, CNPMedford, MA 021551477710515
  3. Jaime Dufresne, FNP-CMedford, MA 021551811277338
  4. Josephine Gaviola, FNP-BC, MSN-EDMedford, MA 021551194189902
  5. Sara Grant, FNPMedford, MA 021551104277813
  6. Mary Jo Holland, CFNPMedford, MA 021551437362084
  7. Susan Ludwig, NPMedford, MA 021551679873145
  8. Victoria McDermott, NPMedford, MA 021551548562028

Common questions

What is Caroline Elizabeth O'Brien, FNP-C's NPI number?

Caroline Elizabeth O'Brien, FNP-C's National Provider Identifier (NPI) is 1124828801, issued on Mar 13, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Caroline Elizabeth O'Brien, FNP-C located?

The NPPES record lists a practice address at 22 Franklin St, Medford, MA, 02155. Phone: (781) 350-8571. Providers update this record themselves, so call before visiting.

How can I verify Caroline Elizabeth O'Brien, FNP-C's license?

NPPES lists Massachusetts license number RN2333758, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.