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East End Neuropsych Logo
Long Island's Premier Neuropsychiatric Center

Expert Care for
Mind, Memory
& Aging

East End Neuropsych specializes in geriatric neuropsychiatry, Alzheimer's disease, dementia, and advanced treatment options including IV Ketamine therapy — serving Long Island with compassion.

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On-CallAfter-Hours Provider
15+Conditions Treated
NY · FLTelehealth Licensed
MedicareAccepted
About the Practice

A Multidisciplinary Team
in Geriatric Neuropsychiatry

East End Neuropsych P.C. is Long Island's premier center for dementia, Alzheimer's disease, geriatric depression, and neurocognitive disorders. Led by Eric Spronz, RN-BC, PMHNP, MSN, our team provides exceptional, bespoke care for every patient.

Residency Training Site

Proud training site for local medical schools and colleges across Long Island

Veteran Care

Proudly serving veterans via CHAMPS VA, Tricare, VACC, and 9/11 Zadroga funding

Fully Accessible Facility

Handicap accessible with reserved parking directly in front of the building

Insurance Accepted
Medicare
Traditional Medicare Part B · Railroad Medicare
Medicare Advantage
Aetna · Cigna · United Healthcare (verify network)
Veterans & Special Programs
CHAMPS VA · Tricare · VACC · 9/11 Zadroga Fund
⚠ We do not accept Medicaid or any Medicaid plans
What We Treat

Conditions We Specialize In

Our geriatric neuropsychiatric team has deep expertise in the complex intersection of aging, neurology, and mental health.

Alzheimer's Disease

Full-spectrum evaluation, medication management, and family support across all disease stages

Vascular Dementia

Post-stroke cognitive decline, cerebrovascular disease, and executive dysfunction management

Lewy Body Dementia

Hallucinations, Parkinsonian features, cognitive fluctuation — specialized medication protocols

Parkinson's Disease

Neuropsychiatric symptoms including psychosis, impulse control, depression, and cognitive decline

Geriatric Depression

Late-onset major depression, melancholic subtypes, pseudodementia, and ECT evaluation

Traumatic Brain Injury

Post-TBI psychiatric sequelae, emotional dysregulation, and cognitive rehabilitation support

Multiple Sclerosis

MS-related cognitive impairment, depression, fatigue, and pseudobulbar affect management

PTSD & Complex Trauma

Combat and civilian PTSD, complex trauma, veterans care, and treatment-resistant cases

Anxiety Disorders

Generalized anxiety, late-life panic disorder, somatic symptom disorder, and health anxiety

Bipolar Disorder

Mood stabilization, lithium monitoring, geriatric-appropriate medication protocols

CRPS & Chronic Pain

Complex Regional Pain Syndrome, somatic pain disorders, and neuropsychiatric pain management

Developmental Disabilities

Psychiatric care for adults with intellectual, autism-spectrum, and developmental conditions

Advanced Treatment Option

IV Ketamine
Infusion Therapy

East End Neuropsych is now offering in-office intravenous (IV) ketamine infusions for treatment-resistant depression, PTSD, and chronic pain conditions. Ketamine acts on the NMDA receptor, producing rapid antidepressant effects — often within hours — for patients who have not responded to conventional treatments.

  • Rapid-acting relief — many patients respond within 24–72 hours
  • Effective for treatment-resistant major depression and bipolar depression
  • Evidence-based therapy for PTSD and complex trauma
  • May be covered by Medicare — call our office to check eligibility
  • Administered by experienced licensed clinical staff
  • Pre-infusion evaluation and full medical clearance required
  • 6-session induction series; maintenance infusions available

How IV Ketamine Works

Ketamine blocks NMDA glutamate receptors, rapidly increasing synaptic plasticity and restoring neural connections damaged by chronic stress and depression. Unlike SSRIs (2–6 weeks), ketamine can produce antidepressant effects within hours.

Who Is a Candidate?

Adults with major depressive disorder (MDD) who have failed ≥2 adequate antidepressant trials; bipolar depression; PTSD; suicidal ideation (monitored setting); and certain neuropathic pain syndromes. A comprehensive evaluation is required.

Treatment Protocol

Induction: 6 infusions over 2–3 weeks
Duration: ~40–60 minutes per infusion
Maintenance: Monthly or as-needed
Post-infusion: 1 hour monitoring · Escort required

Medicare Coverage

IV ketamine may be covered under Medicare. Coverage depends on diagnosis, prior authorization, and medical necessity documentation. We will verify your specific benefits before scheduling. Private pay rates also available.

Learn More & Request →
Our People

Meet the East End Neuropsych Team

We are a close-knit, multidisciplinary team bound by one shared mission: to give every patient the care, dignity, and attention they deserve — exactly the way you'd care for your own family member.

Eric Spronz
East End Neuropsych
Eric Spronz
MSN, PMHNP-BC, CASAC
Medical Director
📞 (631) 737-6434
Medical Director & Practice Owner

Eric Spronz,
MSN, PMHNP-BC, CASAC

Eric has been in the medical field for over 20 years — from group home administration to clinical director. His goal is simple: to make every day the best day possible for your loved one. He works hand-in-hand with each patient to meet their individual goals and help them achieve optimal mental health.

Eric trained under the legendary Dr. Alan Steinberg for eight years before taking over the practice in 2021. He developed his deep love for the geriatric population through caring for his own grandmother — affectionately called Nana — who traveled to the Taj Mahal in her 80s. Eric sees every patient the way he saw Nana: with unconditional care and tireless dedication.

At East End Neuropsych, no patient is ever double-booked or stacked in exam rooms. Every appointment gets Eric's undivided attention. Outside the office, Eric serves as an officer in the Port Jefferson Fire Department (since 1999) and lives in Port Jefferson with his wife Sara, son Zev, and the beloved office therapy dogs, RoRo and Emily.

20+ Years Experience
Geriatric Neuropsychiatry
CASAC Certified
Residency Training Supervisor
Port Jefferson Fire Dept. Officer
Read Eric's letter to patients →
Family & Individual Therapist

Chana Topek-Diamond,
LCSW, CLC

Chana received her Masters in Social Work from Yeshiva University Wurzweiler School of Social Work, combined with a certificate in Jewish Communal Service. She brings years of experience across community-based, residential, and outpatient mental health programs — and serves concurrently as a Field Liaison with the Stony Brook University School of Social Welfare.

Chana works from a strengths-based and holistic perspective, understanding that people are complex beings shaped by a lifetime of experiences. She loves witnessing the resilience of her clients and supporting them through complicated times.

Chana spends dedicated time with the family of each new patient to explain the disease process, navigate challenging behaviors, and connect families with the right resources. Family Education Sessions are required for all new patients and are always available on request. Sessions are covered by insurance in the same way as patient sessions.

💬 During Family Education Sessions, Chana asks that the patient not be present — this allows families to ask questions freely and openly.
Chana Topek-Diamond
Stephanie Infante
Neuropsychiatric Nurse Practitioner

Stephanie Infante,
RN, MSN, PMHNP-BC

Stephanie has been working in the mental health field for over 12 years. Her diverse clinical background spans psychiatry, cardiology, neurology, Alzheimer's, and dementia — making her one of the most well-rounded providers on our team. She earned her MSN as a Psychiatric Mental Health Nurse Practitioner from Stony Brook University, where she also trained for a year with Dr. Alan Steinberg.

Stephanie's genuine passion for advocacy and her empathetic approach have left a lasting impact on patients and families navigating complex diagnoses. She works closely with patients and their loved ones to ensure everyone feels supported, understood, and cared for.

Outside the office, Stephanie enjoys reading, cooking, and spending quality time with her husband and son.

Neuropsychiatric Nurse Practitioner

Kendall Godt,
RN, MSN, PMHNP-BC

Kendall is a board-certified Family Psychiatric Mental Health Nurse Practitioner with a dedication to the physical, psychological, and spiritual welfare of every client. She holds a BA in Sociology from SUNY Geneseo, a BS in Nursing from Binghamton University, and an MS in Family Psychiatric Mental Health Nursing — also from Binghamton.

Kendall worked for four years at Mather Hospital's inpatient psychiatric ward with individuals across the lifespan before completing her residency here at East End Neuropsych under medical director Eric Spronz. She has a special passion for the geriatric population and is proud to serve the community she loves.

When not at work, Kendall enjoys traveling and spending time with her family and her pet rabbits.

Kendall Godt
Lindsey Freking
Psychiatric-Mental Health Nurse Practitioner

Lindsey Freking,
PMHNP-BC, MSN, RN

Lindsey is a dedicated PMHNP-BC with over 12 years of clinical experience in emergency care, intensive care, and psychiatry. She earned her MSN from Stony Brook University, building a strong foundation in advanced nursing practices that spans the most challenging clinical environments.

Her diverse background gives Lindsey a unique, holistic perspective on patient care. She thrives on connecting with patients and fostering a supportive, healing environment. Her clinical expertise combined with genuine warmth makes an immediate difference for the patients she serves.

Outside of work, Lindsey loves spending time with her family and tending to her backyard flower garden — a peaceful retreat that reflects her dedication to cultivating beauty and calm in everything she does.

Practice Manager

Kris Allgaier,
Practice Manager

Kris is the heartbeat of East End Neuropsych's day-to-day operations. She oversees all office needs and is your first call for appointment scheduling, billing questions, and anything that makes your visit smoother. No concern is too small — Kris is always ready to help.

Family is Kris's world. She is the proud mother of three wonderful daughters and can often be found cheering at her youngest's sports games or celebrating the milestones of all three. She brings that same warmth and devotion into the office every single day.

You'll also frequently see Kris walking the beloved therapy dogs, RoRo and Emily, between patient appointments. Her ultimate goal: for every patient and family member to feel completely at home the moment they walk through the door.

New Patient Scheduling & Billing Questions: (631) 737-6434
Kris Allgaier
Cheyenne Mote
Office Staff

Cheyenne Mote,
Office Staff

Cheyenne is a recent graduate with a Master's degree in Clinical Mental Health Counseling and is passionate about supporting older adults, caregivers, and families through life's transitions. She is pursuing a career working with the geriatric population, helping individuals regain a sense of identity, purpose, and confidence as they navigate aging, loss, and other life changes.

Cheyenne is also dedicated to helping caregivers and family members manage caregiver burnout, build coping skills, and provide compassionate care for their loved ones. In addition, she has a growing passion for supporting individuals living with chronic illnesses as they navigate the unique challenges associated with their conditions.

Outside of her professional interests, she enjoys traveling, collecting cookbooks, baking, spending time with family and friends, and her dog, Virginia.

Office Staff

Jade Allgaier,
Office Staff

Jade is a Public Health major at Stony Brook University, expected to graduate in Spring 2027. She plans to continue her education and pursue a career as a Physician Assistant.

Before joining East End Neuropsych, Jade worked as an in-home caregiver. Caring for a retired Stony Brook nurse — a patient of Medical Director Eric Spronz for over a decade — inspired her passion for healthcare and reinforced her desire to make a meaningful difference in the lives of patients and their families.

Outside of work and school, Jade enjoys spending time with her family, friends, and fiancé. She loves summer trips to Fire Island, cooking and hosting family dinners, and spending time with her rescue dog, Pearl, who occasionally visits the office. On weekends, Jade and her fiancé take Pearl on car rides and long walks, and visit her favorite person, Kris — East End Neuropsych's Office Manager, Jade's mother, and Pearl's beloved Mimi.

Jade Allgaier
Office Therapy Dogs

RoRo & Emily 🐾

Our certified therapy dogs and the most popular members of the team. They greet every patient with unconditional love and have a remarkable ability to calm nerves and bring smiles to faces of all ages.

RoRo and Emily — East End Neuropsych therapy dogs

We love greeting everyone who comes in! We enjoy being pet but please don't feed us or pick us up. We'll happily try to sit in your lap.

If you're uncomfortable with dogs, just let the front desk know in advance and we'll take our break during your visit. No worries at all!

Both full-grown mixed breed rescue dogs. At home we live with Eric's family and love playing with each other and with Zev.

Our Wonderful Team — 2025
East End Neuropsych Team 2025 ⭐ Share Your Experience on Google Reviews
Medical Director Emeritus
Dr. Alan Steinberg

Dr. Alan L. Steinberg, M.D.

Medical Director Emeritus — Retired 2021

Dr. Steinberg served as principal psychiatrist at East End Neuropsychiatric Associates for over 30 years before retiring in October 2021. He mentored Eric Spronz for eight years and has been the foundation of this practice's extraordinary reputation.

He received his MD from Mount Sinai School of Medicine, trained at Johns Hopkins Hospital, and completed a Geriatric Psychiatry Fellowship at Cornell-New York Hospital. He served as Medical Director of the Center of Excellence for Alzheimer's Disease at Stony Brook University.

"Thank you for the privilege of being a part of your health care. I am confident that Eric and the team will give you the very best care." — Dr. Steinberg

Existing Patients

Access Your Patient Portal

View your records, request prescription refills, send messages to your care team, review lab results, and manage your appointments — all from one secure location.

🔐 Go to Patient Portal Secure · HIPAA Compliant · PHI Portal
Share Your Experience

Did we make a difference?
Tell us on Google

Your review helps other Long Island families find compassionate geriatric neuropsychiatric care when they need it most. It takes less than a minute — and it means the world to our team.

Leave a 5-Star Review on Google
Takes less than a minute · Opens in Google Maps · Helps other families find us
No Surprises Act · Transparency

Fee Schedule & Good Faith Cost Estimates

In compliance with the federal No Surprises Act (42 U.S.C. § 300gg-111), East End Neuropsych P.C. provides the following Good Faith Cost Estimates for uninsured or self-pay patients. Medicare rates reflect the 2025 Medicare Physician Fee Schedule for the Long Island / NY suburbs locality. Actual reimbursement may vary based on individual plan terms.

📋 No Surprises Act: You have the right to receive a Good Faith Estimate for services upon request or before scheduling. These estimates are for informational purposes. Your actual billed amount may vary based on medical complexity, time, and insurance adjustments. Inquire at (631) 737-6434.
Service Description CPT Code 2025 Medicare Rate Private Pay Rate Notes
EVALUATION & MANAGEMENT — NEW PATIENTS
New Patient Psychiatric Evaluation (60–90 min)90791$261$400Initial psychiatric diagnostic evaluation
New Patient Eval w/ Medical Decision-Making90792$285$425Includes medication management component
New Patient E&M — High Complexity99205$302$400Complex new patient office visit
EVALUATION & MANAGEMENT — ESTABLISHED PATIENTS
Follow-Up Visit — Low-Moderate Complexity99213$98$150
Follow-Up Visit — Moderate Complexity99214$148$200
Follow-Up Visit — High Complexity99215$193$250
PSYCHOTHERAPY (COMBINED WITH E&M)
Psychotherapy Add-on, 30 min90833Verify w/ Medicare+$75Added to E&M code
Psychotherapy Add-on, 45 min90836$103+$100Added to E&M code
Psychotherapy Add-on, 60 min90838$138+$125Added to E&M code
NEUROCOGNITIVE ASSESSMENT
Neurobehavioral Status Exam (per hour)96116$130$185Clinician administered
Neuropsychological Testing Administration96132$152$200First hour; add-on per hour available
MMSE / Cognitive Screening96127$8$25Brief standardized screening
IV KETAMINE INFUSIONS
IV Infusion — First Hour (Ketamine)96365Varies*$650*Medicare coverage varies; prior auth required
Ketamine Induction Package (6 sessions)Verify$3,500Standard 6-infusion induction series
Ketamine Maintenance Infusion96365Varies*$650Monthly or as-needed
Pre-Ketamine Psychiatric Evaluation90792$285$400Required before initiating ketamine
ADMINISTRATIVE & MISCELLANEOUS FEES
No-Show / Late Cancellation — 30 min apptN/A$75<24 hours notice or missed appointment
No-Show / Late Cancellation — 45 min apptN/A$100<24 hours notice or missed appointment
No-Show / Late Cancellation — 60+ min apptN/A$150Ketamine and extended appts
Medical Letter / Disability FormN/A$75Per letter
New Patient Refundable DepositN/A$250Returned at first appointment

* Medicare rates are approximate 2025 allowables for the Long Island/Nassau-Suffolk locality. Actual reimbursement varies by plan. This is not a guarantee of payment. For a personalized Good Faith Estimate, contact our office. Private pay rates are firm; cash/check discount may apply — inquire at time of service.

Care Where You Live

In-Home Psychiatric & Memory Visits

Home visits are reserved for select situations and offered on a case-by-case basis — typically for patients who genuinely cannot be seen in the office or by telehealth, such as those with advanced dementia, significant mobility or fall-risk limitations, or a recent hospital discharge. Routine visits are conducted in our Centereach office or by telehealth (licensed in NY & FL). If you think an in-home visit may be medically necessary, call our office and our team will determine whether one can be arranged.

Who it's for
  • Older adults with mobility, transportation, or fall-risk concerns
  • Patients with moderate-to-severe dementia who become disoriented in clinical settings
  • Recently discharged patients needing continuity of care at home
  • Hospice / palliative-care collaborations
  • Family members who need a clinician to observe the patient in their own environment
What we do
  • Full psychiatric evaluations and follow-up visits
  • Cognitive screening (MMSE, MoCA) and neurobehavioral status exam
  • Medication review, adjustment, and prescribing
  • Caregiver coaching and family education at the kitchen table
  • Coordination with your primary care, neurologist, and home-health team
How it works
  • Call (631) 737-6434 to ask whether an in-home visit is appropriate — each request is reviewed individually
  • If approved, we confirm coverage (Medicare Part B and most plans cover home visits when medically necessary)
  • A clinician schedules a visit window that works for the patient and family
  • Limited availability; travel area is Suffolk County and the East End of Long Island
A note for families: Home visits work best when a familiar person is present — a spouse, adult child, or aide who knows the patient's history. Please make sure pets are secured and the visit area is well-lit. If the patient uses oxygen, walkers, or other equipment, just leave it in place — we work around the home, not the other way around.
📞 Call to request a home visit Contact us →
New Patients

New Patient Registration

Complete all sections below. Your intake packet will be reviewed by our team. A $250 refundable deposit is required to hold your appointment date. Once received, we will contact you to schedule your initial evaluation.

Prefer a PDF? Two options Fill it on your computer (type into the form in any PDF reader and save), or print & fill by hand. Either way, email it back to office@eastendneuropsych.com or bring it to your first appointment.
Geriatric Psychiatry Education

Educational Resources for Patients & Families

Curated, evidence-based educational resources from leading academic and clinical institutions on Alzheimer's disease, dementia, geriatric mental health, neurology, and aging.

Alzheimer's & Dementia

Understanding Alzheimer's Disease

Comprehensive resources on disease progression, diagnosis, management, and caregiver support from the world's leading dementia research organizations.

Geriatric Depression & Mood

Late-Life Depression & Mood Disorders

Resources on depression in older adults, treatment options including ketamine, and distinguishing depression from dementia ("pseudodementia").

Parkinson's Disease

Parkinson's & Neuropsychiatric Symptoms

Parkinson's disease affects more than motor function — depression, psychosis, impulse control, and cognitive decline are common and treatable. Learn how.

PTSD & Veterans Mental Health

PTSD, Trauma, and Veterans Care

Evidence-based resources for veterans and civilians experiencing PTSD, traumatic brain injury, and complex trauma — including ketamine therapy information.

Neurology & Brain Health

Neurological Disease Processes in Aging

Understanding the biological underpinnings of neurodegeneration, vascular disease, cognitive decline, and brain aging from top neurology authorities.

Medicare Resources

Medicare Benefits & Coverage

Understanding your Medicare rights, coverage tiers, and how to verify benefits before scheduling psychiatric or specialty visits.

IV Ketamine Therapy

Ketamine for Depression & PTSD

Evidence-based information on how ketamine works, what to expect, clinical studies, and patient perspectives from leading medical centers.

Caregiver Support

Support for Dementia Caregivers

Caring for someone with dementia or Alzheimer's is one of life's most demanding roles. These resources support caregivers through education, community, and respite care.

Long Island Community

Local Long Island Resources for Seniors

Local support organizations, adult day programs, home health services, and senior resources across Suffolk and Nassau Counties.

Contact Us

Visit or Contact East End Neuropsych

East End Neuropsych waiting room — warm, accessible, plant-filled space at our Centereach office
Our Centereach Office — 2539 Middle Country Rd, Suite 4
📍

Address

2539 Middle Country Rd, Suite 4
Centereach, NY 11720

Handicap accessible · Reserved parking in front · Ring bell to enter · Church lot available

📞

Phone & Fax

(631) 737-6434

Fax: (631) 738-1226

After-hours voicemail reaches the on-call provider for established patients. For life-threatening emergencies call 911.

✉️
Quick Links
Patient Portal → Meet Our Team → Leave a Google Review ⭐ Community Resources →

📍 Find Us

⚠ This website and email are NOT for clinical emergencies. For urgent psychiatric needs during business hours call (631) 737-6434; established patients reach the on-call provider via after-hours voicemail. For life-threatening emergencies, call 911.