MRS. MARISSA L OSORIO WHNP
NPI 1770273591
Nurse Practitioner - Women's Health in Winchester, MA
About Mrs. Marissa L Osorio Whnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. MARISSA L OSORIO WHNP (NPI 1770273591) is an individual women's health provider in Winchester, Massachusetts, licensed in Massachusetts (RN2328964) and active in the NPI registry since May 2023. She is enrolled in Medicare PECOS, is affiliated with Winchester Hospital, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mrs. Marissa L Osorio Whnp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Winchester Hospital
Acute Care Hospitals · Winchester, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01890 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Marissa Osorio's NPI number?
The NPI number for Marissa Osorio is 1770273591. It was assigned to this individual provider in the NPPES registry on May 15, 2023.
Where is Marissa Osorio located?
Marissa Osorio practices at 1021 Main St Ste 102, Winchester, MA 01890. The listed phone number is (781) 721-4701.
What is Marissa Osorio's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Women's Health, with taxonomy code 363LW0102X.
Is Marissa Osorio enrolled in Medicare?
Yes. Marissa Osorio is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Is Marissa Osorio affiliated with any hospitals?
According to CMS data, Marissa Osorio is affiliated with Winchester Hospital.
When was this NPI record last updated?
The NPPES record for Marissa Osorio was last updated on July 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 45 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mrs. Marissa L Osorio, WHNP · NPI 1770273591
Women's Health physician in Winchester, Massachusetts. Individual provider, active in the CMS NPPES registry since May 15, 2023.
## Identity
- **NPI:** 1770273591 (Entity type: Individual)
- **Enumerated:** May 15, 2023
- **Primary specialty:** Nurse Practitioner - Women's Health · taxonomy 363LW0102X
- **State license:** RN2328964 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1021 MAIN ST STE 102, Winchester, MA 01890-1971
- **Phone:** (781) 721-4701
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** July 11, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1770273591) · Data from the CMS NPPES public registry.