Gretchen O'Brien, N.P.
Nurse Practitioner · Needham, MA
Gretchen O'Brien, N.P. is a nurse practitioner with a practice address in Needham, Massachusetts, and NPI 1013220961, issued on Jul 21, 2010. Check the license (Massachusetts RN232134, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gretchen O'Brien
- Credential
- N.P.
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- RN232134 MA
Self-reported in NPPES; status is on the state search - Practice location
- 148 Chestnut St, Needham, MA 02492
- Phone
- (781) 453-7750
- Enumerated
- Jul 21, 2010
- Record last updated
- Feb 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (781) 453-7770
- Medicare enrollment
- Enrolled (PECOS I20050620000445); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 148 Chestnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Stuart BlessInternal Medicine Physician1740350826
- Maria Cronin, PACPhysician Assistant1184696395
- Isabella D'Ambra, RDRegistered Dietitian1063226504
Verify Gretchen 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 RN232134Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average nurse practitioner in 2024
133 Medicare Part D claims for 68 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Metoprolol Succinate41 claims
- Eliquis23 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: $283.10
2 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific Corporation. The 38,884 providers of this specialty with any payment received $791.64 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
- Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr IncNeedham, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nurse Practitioner providers in Massachusetts
There are 3,480 nurse practitioner records in Massachusetts.
Other nurse practitioner records in Massachusetts
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- Alberta Abbuah, PMHNPFramingham, MA1437873411
- Fatima AbdallaMelrose, MA1326407529
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- Esayas Abraham, NPChelsea, MA1851275895
Common questions
What is Gretchen O'Brien, N.P.'s NPI number?
Gretchen O'Brien, N.P.'s National Provider Identifier (NPI) is 1013220961, issued on Jul 21, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Gretchen O'Brien, N.P. located?
The NPPES record lists a practice address at 148 Chestnut St, Needham, MA, 02492. Phone: (781) 453-7750. Providers update this record themselves, so call before visiting.
How can I verify Gretchen O'Brien, N.P.'s license?
NPPES lists Massachusetts license number RN232134, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Gretchen O'Brien, N.P. prescribe under Medicare Part D?
In 2024, Gretchen O'Brien, N.P. had 133 Medicare Part D claims for 68 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.