William Katsiyiannis, MD
NPI 1811953987 · Clinical Cardiac Electrophysiology Physician · Minneapolis, MN
Enrolled with Medicare as Practitioner - Cardiac Electrophysiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Katsiyiannis, MD is a Clinical Cardiac Electrophysiology Physician provider in Minneapolis, MN (NPI 1811953987).
Provider details
- NPI number
- 1811953987
- Entity type
- Individual
- Primary specialty
- Clinical Cardiac Electrophysiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 46466 (MN)
Specialties & taxonomies
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,163 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 Single, Dual, Multiple Lead Or Leadless Pacemaker System Or Implantable Defibrillator System, Remote Up to 90 Days93296 | 340 | $21 |
| Evaluation of Single, Dual, Multiple Lead Or Leadless Pacemaker System, Remote Up to 90 Days93294 | 252 | $28 |
| Evaluation of Single, Dual, Or Multiple Lead Implantable Defibrillator System, Remote Up to 90 Days93295 | 92 | $35 |
| Programming of Dual Lead Pacemaker System93280 | 83 | $78 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 83 | $124 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 352 | 77 |
| Flecainide Acetate | 142 | 43 |
| Metoprolol Succinate | 113 | 34 |
| Sotalol Hclbrand: Sotalol | 73 | 27 |
| Rivaroxabanbrand: Xarelto | 65 | 22 |
| Propafenone Hcl | 32 | — |
| Diltiazem Hclbrand: Diltiazem 24hr Er (cd) |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$162 across 2 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
- 2006-04-26
- Last updated
- 2021-03-11
- Certified
- 2021-03-11
Frequently asked questions
- What is William Katsiyiannis's NPI number?
- William Katsiyiannis's National Provider Identifier (NPI) is 1811953987, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Katsiyiannis's specialty?
- William Katsiyiannis is listed in the NPPES registry with a primary specialty of Clinical Cardiac Electrophysiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Katsiyiannis located?
- William Katsiyiannis's practice location on file with NPPES is 800 E 28th St, Minneapolis, MN 55407-3723.
- What is William Katsiyiannis's phone number?
- The practice phone number listed in the NPPES registry for William Katsiyiannis is (612) 775-3030.
- Does William Katsiyiannis accept Medicare?
- William Katsiyiannis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Katsiyiannis's NPI active?
- Yes — William Katsiyiannis's NPI (1811953987) is active in the NPPES registry as of the last update on 2021-03-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.