Dean Cassimatis, M.D.
NPI 1821097742 · Gastroenterology Physician · New Windsor, NY
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dean Cassimatis, M.D. is a Gastroenterology Physician provider in New Windsor, NY (NPI 1821097742).
Provider details
- NPI number
- 1821097742
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 175299 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,022 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 404 | $97 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 190 | $136 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 79 | $119 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 71 | $131 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 64 | $421 |
| Biopsy of Large Bowel Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 1,049 | 328 |
| Pantoprazole Sodium | 411 | 123 |
| Famotidine | 319 | 110 |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab | 121 | 119 |
| Sucralfate | 31 | — |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 31 | 31 |
| Mesalamine | 30 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,956 across 128 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-21
- Last updated
- 2012-10-03
Frequently asked questions
- What is Dean Cassimatis's NPI number?
- Dean Cassimatis's National Provider Identifier (NPI) is 1821097742, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dean Cassimatis's specialty?
- Dean Cassimatis is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Dean Cassimatis located?
- Dean Cassimatis's practice location on file with NPPES is 277 Quassaick Ave, New Windsor, NY 12553-7632.
- What is Dean Cassimatis's phone number?
- The practice phone number listed in the NPPES registry for Dean Cassimatis is (845) 565-5630.
- Does Dean Cassimatis accept Medicare?
- Dean Cassimatis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dean Cassimatis's NPI active?
- Yes — Dean Cassimatis's NPI (1821097742) is active in the NPPES registry as of the last update on 2012-10-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.