Guillermo Diaz

PMHNP (he/him)15 years of experienceNext available
5.0 (33)
Solution oriented
Authentic
Intelligent

As an experienced Psychiatric Nurse Practitioner based out of Long Island, NY, I offer adult patients high quality psychiatric services in the comfort of their own homes.

Close personal experience with mental illness brought me this field and I bring unique insight and a deep passion for helping others on their mental health journeys.

Whether for privacy concerns, busy schedules, or difficulty getting outside, my patients are provided with a full array of psychiatry services for their mental health needs via tele-health. I specialize in creating a safe and supportive environment for clients dealing with anxiety, depression, bipolar disorder, and dementia. My approach combines personalized care and evidence-based practices, including medication management, to help clients find the most effective strategies for their unique needs.

First session

We will get to know each other, develop a treatment plan together and then outline a timeline so you can leave our first session with a strong understanding of the positive changes to come.

Strengths

Friends and family often describe me as loyal, empathic, warm, and grounded. Close personal experience with mental illness brought me this field and I bring unique insight and a deep passion for helping others on their mental health journeys.

Ideal clients

Working exclusively with adults aged 18 and over, I am an experience mental health provider positioned to serve most adults that are eager to take the steps necessary to improve their mental health. Conditions treated include ADHD, depression, anxiety, dementia, schizophrenia, bipolar disorder, and most other conditions as well. I offer daytime, evening and weekend appointments.

Treatment methods

Motivational Interviewing

As a Psychiatric Nurse Practitioner, I specialize in creating a safe and supportive environment for clients dealing with anxiety, depression, bipolar disorder, and dementia. My approach combines personalized care, motivational interviewing, and evidence-based practices, including medication management, to help clients find the most effective strategies for their unique needs.

Location

Virtual sessions

Reviews and ratings

5.0 rating (33)10 reviews
September 25, 2026

Guillermo is a very professional and solution oriented med manager. He listens carefully and thoughtfully and offers a clear set of options for treatment. I am very confident in his ability to manage my meds and help get my insomnia under control.

Verified client, age 65+Review shared after session 1 with Guillermo
September 19, 2026

This provider is very pragmatic and is not shy or insecure at ALL when it comes to making his choices about giving a medication. I was so afraid that I have controlled medications that basically have been life-changing and he would be of the generation of providers that aren't comfortable using either Benzo's or Stimulants to help treat very serious disorders. ADHD has been a life altering illness since age 6. I have been on stimulants for 41 years.

Verified client, age 45-54Review shared after session 5 with Guillermo
August 17, 2026

Guillermo is great! I appreciate him considering all my symptoms and feedback. he's always willing to work with me and hear me out. super grateful!

Verified client, age 25-34Review shared after session 5 with Guillermo

Looking for a better fit?

Click below to find other providers in who match your preferences.

Schedule 60 min