John Kassotis, M.D.
NPI 1598759003 · Clinical Cardiac Electrophysiology Physician · Riverhead, NY
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Kassotis, M.D. is a Clinical Cardiac Electrophysiology Physician provider in Riverhead, NY (NPI 1598759003).
Provider details
- NPI number
- 1598759003
- Entity type
- Individual
- Primary specialty
- Clinical Cardiac Electrophysiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 187961-01 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,478 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) |
|---|---|---|
| Evaluation of Cardiac Rhythm Monitor System, Remote Up to 30 Days93298 | 747 | $118 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 395 | $18 |
| Evaluation of Single, Dual, Multiple Lead Or Leadless Pacemaker System Or Implantable Defibrillator System, Remote Up to 90 Days93296 | 387 | $25 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 358 | $146 |
| Evaluation of Single, Dual, Multiple Lead Or Leadless Pacemaker System, Remote Up to 90 Days93294 | 279 | $32 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$26,557 across 35 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
Additional practice locations (1)
- 450 Clarkson Ave2nd Fl. Rm# A2-393Brooklyn, NY 11203-2056Phone: (718) 270-1081Fax: (718) 270-2917
Registry dates
- Enumerated
- 2005-09-12
- Last updated
- 2023-04-07
- Certified
- 2023-04-07
Frequently asked questions
- What is John Kassotis's NPI number?
- John Kassotis's National Provider Identifier (NPI) is 1598759003, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Kassotis's specialty?
- John Kassotis is listed in the NPPES registry with a primary specialty of Clinical Cardiac Electrophysiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Kassotis located?
- John Kassotis's practice location on file with NPPES is 951 Roanoke Ave, Riverhead, NY 11901-2724.
- What is John Kassotis's phone number?
- The practice phone number listed in the NPPES registry for John Kassotis is (631) 369-5005.
- Does John Kassotis accept Medicare?
- John Kassotis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Kassotis's NPI active?
- Yes — John Kassotis's NPI (1598759003) is active in the NPPES registry as of the last update on 2023-04-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.