

I’m a psychiatric nurse practitioner providing telehealth medication management for adults across New York. I specialize in treating ADHD, anxiety, depression, mood disorders, and stress-related concerns.
My approach is structured, evidence-based, and focused on measurable improvement. We work together to clarify what’s driving your symptoms and create a clear, practical treatment plan. When medication is appropriate, I aim for options that are effective, well-tolerated, and sustainable long-term.
I primarily work with adults seeking focused, collaborative psychiatric care via telehealth.
What I Treat Most Often
I provide comprehensive psychiatric evaluations and ongoing medication management through secure telehealth appointments for adults in New York.
I am a compassionate and dedicated Psychiatric Nurse Practitioner committed to providing high-quality mental health care to individuals. I strive to help patients achieve emotional wellness, stability, and improved quality of life.
My approach to care is patient-centered, evidence-based, and collaborative. I believe in building trusting relationships with patients, families, and caregivers while creating individualized treatment plans that address both mental and physical health needs. I am experienced in managing conditions such as anxiety, depression, bipolar disorder, ADHD, PTSD, schizophrenia, mood disorders, behavioral disorders, and other complex psychiatric conditions.
I also bring valuable experience working with children and adolescents facing emotional, behavioral, developmental, and academic challenges. I am skilled in evaluating and treating conditions such as ADHD, anxiety disorders, depression, oppositional behaviors, trauma-related disorders, autism spectrum-related concerns, and mood dysregulation. I work closely with parents, guardians, schools, therapists, and pediatric providers to create comprehensive treatment plans that support emotional growth, school success, and family functioning.
In addition, I have extensive experience working with geriatric populations and individuals living with dementia, Alzheimer’s disease, and other neurocognitive disorders. I am skilled in assessing cognitive decline and managing behavioral and psychological symptoms of dementia such as agitation, aggression, anxiety, depression, sleep disturbance, and psychosis, while promoting dignity, safety, and quality of life. I collaborate closely with families, caregivers, nursing staff, and interdisciplinary teams to develop supportive care plans and provide education regarding disease progression, behavioral strategies, and medication options.
I am a Psychiatric-Mental Health Nurse Practitioner with over 20 years of nursing experience, including emergency care. I am passionate about mental health and providing holistic, patient-centered treatment through a combination of medication management and therapeutic support. My goal is to help patients feel heard, stabilized, and empowered in their care.
I am a psychiatrist with over fifteen year of experience with children, adolescents and adults, and am dually board-certified by the American Board of Psychiatry and Neurology.
Following undergraduate studies at Barnard College, Columbia University and after medical school, I completed my psychiatry residency at Tufts University and my fellowship in child & adolescent psychiatry at the Icahn School of Medicine at Mount Sinai.
In addition to my clinical work, I have expertise in medical ethics focused on issues of consent, capacity, and shared decision-making in healthcare and for research trials. I also remain dedicated to teaching and mentorship of undergraduates, medical students and trainees.
Before booking, we recommend reviewing our full services and provider availability on our website: www.serenity-ny.com/consultation
Hey - I'm Mike and as you can see from my photo I like to keep things on the more casual side with my clients. I weave fun, jokes, and genuine questions about your personal life into our care plan. If you're looking for a Psychiatric provider who is all business - I'm probably not the right fit. But if you're looking to work with someone who is down to earth, and willing to go the extra mile to be your true partner and confidant on this journey, I'd love to meet you. As a lifelong New Yorker, I understand the unique pressures, pace, and complexity of life here — and I use that insight to offer care that actually fits your world.
Diana Lankenau has a Master of Science in Nursing from Florida State University and Chamberlain University. She has a Bachelor's in nursing from University of Miami. BA in Psychology from Florida International University. She is Board Certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) and Family Nurse Practitioner (FNP-BC).
Accepting New Patients! Hello! I'm Siji Varghese, a Nurse Practitioner in Psychiatry. I conduct psychiatric evaluations, diagnose mental health conditions, and prescribe medications. I have over 10 years of experience as an NP working in various inpatient and outpatient settings. I have been working in the mental health field for over 15 years. As a provider, I hope to provide you with safe, non judgmental space to address any mental health symptoms interfering with your ability to live your best life whether in school, work or family


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