Data from the NPPES registry. May not reflect recent changes — verify at nppes.cms.hhs.gov.
GUILLERMO DIAZ, NP-P
ActivePsychiatric/Mental Health Nurse Practitioner · HICKSVILLE, NY
Registration Details
- NPI Number
- 1164975801
- Provider Type
- Individual
- Gender
- Male
- NPI Issued
- Jul 29, 2016 (9.7385452672811 yrs)
- Last Updated
- Sep 5, 2025
- License
-
402068 (NY)
Practice Information
- Address
-
185 W JOHN ST # 113HICKSVILLE, NY, 118011007Browse NY providers · Browse ZIP 11801
- Phone
- 6468569971
- Fax
- 5165318539
- Primary Specialty
-
Psychiatric/Mental Health Nurse Practitioner
363LP0808X
Other Psychiatric/Mental Health Nurse Practitioner Providers in HICKSVILLE, NY
| Name | Credential | NPI |
|---|---|---|
| MISS MARIE S JEAN | — | 1679854970 |
| FAHIMIR JEAN-BAPTISTE | — | 1760885016 |
| STACYANN COX | NURSE PRACTITIONER | 1114323821 |
| MRS. JOSANN MATASSA | NPP | 1699217018 |
| MRS. CHRISTINA GLORIA HUGHES | RN | 1679059802 |
| EILEEN HEISE | — | 1538643200 |
Data sourced from the NPPES National Provider Identifier registry. This information is for informational purposes only and is not a substitute for verifying credentials with the appropriate licensing authority. For official verification, use the NPPES NPI Registry or the relevant state medical board.