Donna Hatziyianis Guarton, PH.D.
NPI 1265306385 · Clinical Psychologist · Massapequa Park, NY
Donna Hatziyianis Guarton, PH.D. is a Clinical Psychologist provider in Massapequa Park, NY (NPI 1265306385).
Provider details
- NPI number
- 1265306385
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 011485-1 (NY)
Specialties & taxonomies
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
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
- 2025-10-01
- Last updated
- 2025-10-01
- Certified
- 2025-10-01
Frequently asked questions
- What is Donna Hatziyianis Guarton's NPI number?
- Donna Hatziyianis Guarton's National Provider Identifier (NPI) is 1265306385, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donna Hatziyianis Guarton's specialty?
- Donna Hatziyianis Guarton is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Donna Hatziyianis Guarton located?
- Donna Hatziyianis Guarton's practice location on file with NPPES is 18 Mansfield Dr, Massapequa Park, NY 11762-4034.
- What is Donna Hatziyianis Guarton's phone number?
- The practice phone number listed in the NPPES registry for Donna Hatziyianis Guarton is (516) 448-0443.
- Is Donna Hatziyianis Guarton's NPI active?
- Yes — Donna Hatziyianis Guarton's NPI (1265306385) is active in the NPPES registry as of the last update on 2025-10-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.