Mark-Victor Siwoski
NPI 1619363645 · Neurology Physician · Kalamazoo, MI
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark-Victor Siwoski is a Neurology Physician provider in Kalamazoo, MI (NPI 1619363645).
Provider details
- NPI number
- 1619363645
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
439 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) |
|---|---|---|
| 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 | 117 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 61 | $64 |
| Measurement of Brain Wave Activity With Video (veeg), 12-26 Hours With Review and Report By Health Care Professional95720 | 48 | $198 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 48 | $129 |
| Measurement of Brain Wave Activity (eeg), Awake and Asleep95819 | 46 | $54 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levetiracetam | 266 | 79 |
| Lamotrigine | 145 | 22 |
| Lacosamide | 145 | 23 |
| Divalproex Sodium | 85 | 15 |
| Topiramate | 79 | 31 |
| Clobazam | 66 | — |
| Erenumab-Aooebrand: Aimovig Autoinjector | 55 | 11 |
| Primidone | 54 | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$78 across 4 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)
- 1061 Granville AveItasca, IL 60143-2850Phone: (630) 742-8506
Registry dates
- Enumerated
- 2015-04-07
- Last updated
- 2021-01-06
- Certified
- 2021-01-06
Frequently asked questions
- What is Mark-Victor Siwoski's NPI number?
- Mark-Victor Siwoski's National Provider Identifier (NPI) is 1619363645, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark-Victor Siwoski's specialty?
- Mark-Victor Siwoski is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark-Victor Siwoski located?
- Mark-Victor Siwoski's practice location on file with NPPES is 601 John St Ste M-124, Kalamazoo, MI 49007-5377.
- What is Mark-Victor Siwoski's phone number?
- The practice phone number listed in the NPPES registry for Mark-Victor Siwoski is (269) 341-8855.
- Does Mark-Victor Siwoski accept Medicare?
- Mark-Victor Siwoski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark-Victor Siwoski's NPI active?
- Yes — Mark-Victor Siwoski's NPI (1619363645) is active in the NPPES registry as of the last update on 2021-01-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.