4.6
62 Ratings with 29 written Reviews
Summary
Dr. Dean Cassimatis is a gastroenterologist and internal medicine specialist with four decades of clinical experience. He earned his medical degree from New York Medical College, where he also completed his residency training. His extensive background allows him to provide comprehensive digestive health care alongside general internal medicine services. Dr. Cassimatis is fluent in both English and Spanish.
Dr. Cassimatis practices at Montefiore Saint Lukes Cornwall and maintains locations in New Windsor and Newburgh, New York. He specializes in treating digestive conditions such as diverticular disease and GERD. His procedural expertise includes performing colonoscopies and both upper and lower gastrointestinal endoscopies to diagnose and monitor digestive health issues. Patients rate Dr. Cassimatis 4.6 out of 5 stars for his care.
Dr. Cassimatis practices at Montefiore Saint Lukes Cornwall and maintains locations in New Windsor and Newburgh, New York. He specializes in treating digestive conditions such as diverticular disease and GERD. His procedural expertise includes performing colonoscopies and both upper and lower gastrointestinal endoscopies to diagnose and monitor digestive health issues. Patients rate Dr. Cassimatis 4.6 out of 5 stars for his care.
Overview based on verified provider data
Quick Facts
- accepting new patients
- 40 years of experience
- speaks English, Spanish
- New York Medical College
- 29 written reviews
- 2 specialties
- 11 areas of expertise
- 2 board certifications
- 1 hospital affiliation
- 3 office locations
- Male
Patients’ Perspective
- Gave an accurate diagnosis
- Had a good bedside manner
- Spent time with me
Based on patient feedback. Read the reviews
Office Locations
Dr. Dean Nick Cassimatis has 3 locationsHorizon Family Medical Group
277 Quassaick AveNew Windsor, NY 12553 Tel: (845) 565-5630
Mon9:00 am - 5:00 pm
Tue9:00 am - 5:00 pm
Wed9:00 am - 5:00 pm
Thu9:00 am - 5:00 pm
Fri9:00 am - 5:00 pm
SatClosed
SunClosed
Horizon Family Medical Group
88 Old Route 9WNew Windsor, NY 12553 Tel: (845) 549-1011
Mon7:00 am - 3:00 pm
Tue7:00 am - 3:00 pm
Wed7:00 am - 3:00 pm
Thu7:00 am - 3:00 pm
Fri7:00 am - 3:00 pm
SatClosed
SunClosed
Compare with Similar Doctors
 |  |  |  |
| Dr. Dean Nick Cassimatis, MD | Ashley Anderson, APRN | Dr. Daniel Perl, MD | Rachel Oliver, APRN |
| Gastroenterology | Gastroenterology | Gastroenterology | Gastroenterology |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | Accepts New Patients |
| 40 Years of Experience | 11 Years of Experience | ||
| No Virtual Visit Option | Virtual Visit Available | Virtual Visit Available | Virtual Visit Available |
| Speaks English, Spanish | Speaks English | Speaks English | Speaks English |
| New Windsor , NY | Sacramento , CA | New York , NY | Sacramento , CA |
| Med School: New York Medical College | Med School: East Tennessee State University - Quillen College of Medicine | Med School: Icahn School Of Medicine At Mount Sinai | Med School: University of South Alabama |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. Dean Nick Cassimatis
Medical Specialties
Dr. Dean Nick Cassimatis has the following 2 specialties
Specialty Expertise
Dr. Dean Nick Cassimatis has the following 11 areas of expertise
Certifications, License, & Education
40 Years Experience
Dr. Dean Nick Cassimatis holds an expired medical license in the state of New York.
Medical License
Medical Doctor with an expired medical license in the state of New York that expired in 2026.
Education & Training
Residency
Completed their residency at New York Medical College.
Medical School
Graduated from New York Medical College in 1986.
NPI Number
Dr. Cassimatis' NPI number is 1821097742.
Similar doctors
Frequently Asked Questions
- Where is Dr. Dean Cassimatis's office located?
- Dr. Dean Cassimatis's office is located at 277 Quassaick Ave, New Windsor, NY, 12553.
- What languages does Dr. Dean Cassimatis speak?
- Dr. Dean Cassimatis speaks English and Spanish.
- Is Dr. Dean Cassimatis accepting new patients?
- Dr. Dean Cassimatis is accepting new patients on Vitals. View Dr. Dean Cassimatis's profile on Vitals to make an appointment.
- How can I make an appointment with Dr. Dean Cassimatis?
- You can find contact information for Dr. Dean Cassimatis here on Vitals.
- Does Dr. Dean Cassimatis accept my insurance?
- You can see the insurance plans that Dr. Dean Cassimatis accepts on their Vitals profile.
Ensuring Data Transparency and Trust: A Guide to Vitals Doctor Listings and Reviews
Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.
Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.
Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.
