Guillermo Diaz, NP-P

Psychiatric/Mental Health Nurse Practitioner

Nurse Practitioner

Guillermo Diaz is a Psychiatric/Mental Health Nurse Practitioner based in Hicksville, NY with over 10 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.

(646) 856-9971Hicksville, NY
Telehealth Available
NPI Active per CMS — Q2 2026|Medicare Enrolled|Order & Refer

Guillermo Diaz, NP-P has been part of the Hicksville medical community since 2016 in group practice. He has been in practice for 10+ years.

1 of 822 Nurse Practitioner providers in NYSee all Nurse Practitioner in Hicksville10+ years experienceNPI since 2016

Older · 260dNPPES updated 2025-09-05 · verify NPI on CMS · Verify license at New York State Board for Medicine

Contact & Location

Practice Location

185 W John St # 113, Hicksville, NY 11801-1007

Fax: (516) 531-8539

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Background & Specialty

Education, training, and specialty classification from CMS NPPES and Medicare records.

Career Journey
  1. Board certified · Sep 4, 2025

    Self-reported via NPPES

  2. 10 years in practice

    Established

Nurse PractitionerPsychiatric/Mental Health in HicksvillePhysician Assistants & Advanced Practice Nursing Providers

Definition to come...

Taxonomy: 363LP0808X

Virtual Psychiatric/Mental Health Care With Guillermo Diaz

NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.

Schedule a virtual visit with Guillermo Diaz for follow-ups, medication reviews, and ongoing care — no travel to Hicksville required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.

Frequently Asked Questions

Common questions about Guillermo Diaz

Dr. Diaz is listed as active in the NPI registry with telehealth listed in Hicksville, NY. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (646) 856-9971.

Verified across 3 federal data sources

Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D. See Data Methodology.

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Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.

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