Marissa Sylvia, FNP
NPI 1609746940 · Family Nurse Practitioner · Boston, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Sylvia, FNP is a Family Nurse Practitioner provider in Boston, MA (NPI 1609746940).
Provider details
- NPI number
- 1609746940
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- RN2314857 (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
Under 1 yr in 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
- 2025-11-11
- Last updated
- 2026-02-18
- Certified
- 2026-02-18
Frequently asked questions
- What is Marissa Sylvia's NPI number?
- Marissa Sylvia's National Provider Identifier (NPI) is 1609746940, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Sylvia's specialty?
- Marissa Sylvia is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marissa Sylvia located?
- Marissa Sylvia's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is Marissa Sylvia's phone number?
- The practice phone number listed in the NPPES registry for Marissa Sylvia is (617) 355-6000.
- Does Marissa Sylvia accept Medicare?
- Marissa Sylvia is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Sylvia's NPI active?
- Yes — Marissa Sylvia's NPI (1609746940) is active in the NPPES registry as of the last update on 2026-02-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.