Demy Sebastian, FNP
NPI 1629667100 · Family Nurse Practitioner · Valhalla, NY
Enrolled with Medicare as Order and Referring Only - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Demy Sebastian, FNP is a Family Nurse Practitioner provider in Valhalla, NY (NPI 1629667100).
Provider details
- NPI number
- 1629667100
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- F345558-01 (NY)
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
5 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
- 2021-01-11
- Last updated
- 2021-01-11
- Certified
- 2021-01-11
Frequently asked questions
- What is Demy Sebastian's NPI number?
- Demy Sebastian's National Provider Identifier (NPI) is 1629667100, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Demy Sebastian's specialty?
- Demy Sebastian is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Demy Sebastian located?
- Demy Sebastian's practice location on file with NPPES is 100 Woods Rd, Valhalla, NY 10595-1530.
- What is Demy Sebastian's phone number?
- The practice phone number listed in the NPPES registry for Demy Sebastian is (914) 493-7031.
- Does Demy Sebastian accept Medicare?
- Demy Sebastian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Demy Sebastian's NPI active?
- Yes — Demy Sebastian's NPI (1629667100) is active in the NPPES registry as of the last update on 2021-01-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.