Kristen Demertzis, PH.D.
NPI 1265675359 · Clinical Psychologist · Manhasset, NY
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kristen Demertzis, PH.D. is a Clinical Psychologist provider in Manhasset, NY (NPI 1265675359).
Provider details
- NPI number
- 1265675359
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 018050 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 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
- 2009-04-20
- Last updated
- 2009-04-20
Frequently asked questions
- What is Kristen Demertzis's NPI number?
- Kristen Demertzis's National Provider Identifier (NPI) is 1265675359, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kristen Demertzis's specialty?
- Kristen Demertzis is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Kristen Demertzis located?
- Kristen Demertzis's practice location on file with NPPES is 1554 Northern Blvd., Manhasset, NY 11030-3006.
- What is Kristen Demertzis's phone number?
- The practice phone number listed in the NPPES registry for Kristen Demertzis is (516) 719-3700.
- Does Kristen Demertzis accept Medicare?
- Kristen Demertzis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kristen Demertzis's NPI active?
- Yes — Kristen Demertzis's NPI (1265675359) is active in the NPPES registry as of the last update on 2009-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.