Psychiatric evaluations
Talk about your symptoms, medical and mental health history, and how you are managing day to day. Evaluation helps inform the discussion of possible next steps.
Meet Matthew · Clarity Psychiatric
Psychiatric Nurse Practitioner in Smithtown, NY
Matthew Killian, DNP, PMHNP-BC, offers personalized psychiatric care with a focus on understanding your concerns, explaining your options, and working together on your next steps.
MATTHEW KILLIAN, DNP, PMHNP-BCCARE WITH COMPASSION
Smithtown office appointmentsEligible patients across New York StatePrivate-pay practice
Understanding your provider’s role
What does a psychiatric nurse practitioner do?
A psychiatric-mental health nurse practitioner provides mental health care through psychiatric evaluation, treatment planning, medication management, and ongoing follow-up. The goal is to understand your symptoms in the context of your health, daily life, and priorities.
At Clarity Psychiatric, you can discuss what has been difficult, what you have tried before, and what you would like help with. Your questions and preferences are part of that conversation.
Professional credentials
Matthew Killian, DNP, PMHNP-BC
Doctor of Nursing Practice | Board-Certified Psychiatric-Mental Health Nurse Practitioner
View Matthew’s professional profile ↗Care built through conversation.
Matthew holds a Doctor of Nursing Practice degree and is board-certified as a Psychiatric-Mental Health Nurse Practitioner. His approach emphasizes empathetic listening, compassion, education, and individualized care.
He brings experience in private psychiatric practice and caring for veterans through the Veterans Health Administration. At Clarity Psychiatric, he works with patients to explore care options that reflect their individual circumstances.
A personalized approach
From your first conversation to ongoing care.
Psychiatric care is a process. Your needs, treatment history, and goals help shape an approach that can be reviewed over time.
Medication management
When clinically appropriate, discuss medication options, benefits, and concerns. Explore psychiatric medication management in Smithtown.
Ongoing follow-up
Follow-up visits offer time to review your experience, ask questions, and discuss whether your care plan needs adjustment.
Concerns you can discuss
The practice’s areas of care include attention-deficit/hyperactivity disorder (ADHD), anxiety, depression, bipolar disorder, post-traumatic stress disorder (PTSD), obsessive-compulsive disorder (OCD), and other psychiatric concerns.
Learn about ADHD evaluation and treatment or view all areas of care at Clarity Psychiatric. Contact the office to discuss whether the practice’s services fit your needs. An appointment does not guarantee a diagnosis, a particular medication, or a specific outcome.
Visit in person or virtually
Based in Smithtown.
Connected across New York.
In-person appointments are available at 308 West Main Street, Suite 208, Smithtown, NY 11787. The office is an option for patients in nearby Long Island communities including St. James, Kings Park, Commack, Hauppauge, Stony Brook, and East Setauket.
Telehealth appointments are available to eligible patients throughout New York State. Contact the practice to confirm eligibility and whether a virtual visit is appropriate for your needs.
Office hours are Monday and Thursday, 5:00–9:00 PM. Other times may be available by arrangement.
Book an Appointment ↗Planning your care
How does private-pay care work?
Clarity Psychiatric is a private-pay practice. Contact the office for current fees before booking an appointment.
Are superbills available?
Superbills are available upon request for possible out-of-network insurance reimbursement. Reimbursement is not guaranteed and depends on your plan. Ask your insurer about your out-of-network benefits.
How do I schedule?
Use Book an Appointment to open Matthew’s existing Tebra scheduling page, or call (516) 418-7299 to discuss appointment options.
Your next step
Make space for your mental health.
Explore appointment options with Matthew Killian.