Caitlyn Elizabeth O'Brien, FNP-BC
Family Nurse Practitioner · Stoneham, MA
Caitlyn Elizabeth O'Brien, FNP-BC is a family nurse practitioner with a practice address in Stoneham, Massachusetts, and NPI 1962100446, issued on Feb 23, 2023. Check the license (Massachusetts RN2333093, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Caitlyn Elizabeth O'Brien
- Credential
- FNP-BC
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- RN2333093 MA
Self-reported in NPPES; status is on the state search - Practice location
- 3 Woodland RD Ste 217, Stoneham, MA 02180
- Phone
- (781) 395-2922
- Enumerated
- Feb 23, 2023
- Record last updated
- Nov 26, 2024
- Fax
- (781) 393-8905
- Medicare enrollment
- Enrolled (PECOS I20230505001705); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,724 in Massachusetts → Look up another NPI →
Verify Caitlyn Elizabeth 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 RN2333093Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average family nurse practitioner in 2024
136 Medicare Part D claims for 41 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 48% of claims.
Most prescribed
- Albuterol Sulfate Hfa32 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.
Industry payments in 2024: $3,125.51
153 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Allergy And Asthma Physicians PCStoneham, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Caitlyn Elizabeth O'Brien among 4,724 family nurse practitioner records in Massachusetts
Caitlyn Elizabeth O'Brien, FNP-BC 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 2023, is newer than 79% of them.
- NPI issued2023 · 79% of these records are older, 14% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2022 · 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).
16 family nurse practitioner records list a practice address in Stoneham
They are 16 of the 473 NPPES records with a practice address in Stoneham, and 4,724 family nurse practitioner records in Massachusetts.
All 4,724 in Massachusetts → Every provider in Stoneham → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Susan Bove, NPStoneham, MA 021801497719124
- Louisa Codier, NP-CStoneham, MA 021801518512250
- Caroline Colozzi, N.P.Stoneham, MA 021801144516840
- Jessica Croteau, FNPStoneham, MA 021801205677697
- Caroline DudmanStoneham, MA 021801194194126
- Erin Evans, RN, CNPStoneham, MA 021801326733320
- Allyson Grant, NPStoneham, MA 021801407526858
- Kerry Kilban, NPStoneham, MA 021801366330862
Common questions
What is Caitlyn Elizabeth O'Brien, FNP-BC's NPI number?
Caitlyn Elizabeth O'Brien, FNP-BC's National Provider Identifier (NPI) is 1962100446, issued on Feb 23, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Caitlyn Elizabeth O'Brien, FNP-BC located?
The NPPES record lists a practice address at 3 Woodland RD Ste 217, Stoneham, MA, 02180. Phone: (781) 395-2922. Providers update this record themselves, so call before visiting.
How can I verify Caitlyn Elizabeth O'Brien, FNP-BC's license?
NPPES lists Massachusetts license number RN2333093, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Caitlyn Elizabeth O'Brien, FNP-BC prescribe under Medicare Part D?
In 2024, Caitlyn Elizabeth O'Brien, FNP-BC had 136 Medicare Part D claims for 41 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.