Marissa Osorio, WHNP
NPI 1770273591 · Women's Health Nurse Practitioner · Winchester, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Osorio, WHNP is a Women's Health Nurse Practitioner provider in Winchester, MA (NPI 1770273591).
Provider details
- NPI number
- 1770273591
- Entity type
- Individual
- Primary specialty
- Women's Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- WHNP
- Sex
- Female
- Sole proprietor
- Yes
- License
- RN2328964 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-05-15
- Last updated
- 2025-11-20
- Certified
- 2025-11-20
Frequently asked questions
- What is Marissa Osorio's NPI number?
- Marissa Osorio's National Provider Identifier (NPI) is 1770273591, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Osorio's specialty?
- Marissa Osorio is listed in the NPPES registry with a primary specialty of Women's Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marissa Osorio located?
- Marissa Osorio's practice location on file with NPPES is 1021 Main St Ste 102, Winchester, MA 01890-1971.
- What is Marissa Osorio's phone number?
- The practice phone number listed in the NPPES registry for Marissa Osorio is (781) 721-4701.
- Does Marissa Osorio accept Medicare?
- Marissa Osorio is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Osorio's NPI active?
- Yes — Marissa Osorio's NPI (1770273591) is active in the NPPES registry as of the last update on 2025-11-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.