Marissa L. Osorio, WHNP
Women's Health Nurse Practitioner · Winchester, MA
Marissa L. Osorio, WHNP is a women's health nurse practitioner with a practice address in Winchester, Massachusetts, and NPI 1770273591, issued on May 15, 2023. Check the license (Massachusetts RN2328964, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marissa L. Osorio
- Credential
- WHNP
- Primary taxonomy
- Women's Health Nurse Practitioner 363LW0102X
- License number
- RN2328964 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1021 Main St Ste 102, Winchester, MA 01890
- Phone
- (781) 721-4701
- Enumerated
- May 15, 2023
- Record last updated
- Jul 11, 2026
- Medicare enrollment
- Enrolled (PECOS I20230719000083); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest women's health nurse practitioner records → All 329 in Massachusetts → Look up another NPI →
Also registered at 1021 Main St Ste 102
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kyla Malone, RN, NPFamily Nurse Practitioner1902110695
- Ashley Zaganjori, NP-CFamily Nurse Practitioner1992358451
Verify Marissa L. Osorio in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN2328964Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average women's health nurse practitioner in 2024
19 Medicare Part D claims, against an average of 217 among the 3,809 providers of this specialty who prescribed in Part D.
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
- Health Imperatives IncBrockton, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marissa L. Osorio among 329 women's health nurse practitioner records in Massachusetts
Marissa L. Osorio, WHNP is one of 329 women's health nurse practitioner records with a practice address in Massachusetts. 60% 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 87% of them.
- NPI issued2023 · 87% of these records are older, 7% newer
- In a Medicare fileYes · 60% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2017 · median 2015 among the 139 with a school on file
- Record last updated2026 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LW0102X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Women's Health Nurse Practitioner providers in Massachusetts
There are 329 women's health nurse practitioner records in Massachusetts.
All 329 in Massachusetts → Every provider in Winchester → Women's Health Nurse Practitioner nationwide →
The 8 women's health nurse practitioner records with the nearest ZIP codes
- Naomi Yager, CRNPWinchester, MA 018901699172437
- Kristen Sloboda, ARNP, FNP-BCWestford, MA 018861861377095
- Suzanne OharaTewksbury, MA 018761003488057
- Ailin Rodrigues, CNPSaugus, MA 019061164851432
- Amber BelangerReading, MA 018671346996774
- Vicki Maclean, RNPReading, MA 018671538459433
- Gerri Berlin-Cohen, NPBeverly, MA 019151184887598
- Christine Carroll, NURSE PRACTITIONERBeverly, MA 019151376683557
Common questions
What is Marissa L. Osorio, WHNP's NPI number?
Marissa L. Osorio, WHNP's National Provider Identifier (NPI) is 1770273591, issued on May 15, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Marissa L. Osorio, WHNP located?
The NPPES record lists a practice address at 1021 Main St Ste 102, Winchester, MA, 01890. Phone: (781) 721-4701. Providers update this record themselves, so call before visiting.
How can I verify Marissa L. Osorio, WHNP's license?
NPPES lists Massachusetts license number RN2328964, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Marissa L. Osorio, WHNP prescribe under Medicare Part D?
In 2024, Marissa L. Osorio, WHNP had 19 Medicare Part D claims; the average among women's health nurse practitioner prescribers was 217. 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.