Markian Iwaszko, MD
NPI 1659380939 · Urology Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Markian Iwaszko, MD is a Urology Physician provider in Grand Rapids, MI (NPI 1659380939).
Provider details
- NPI number
- 1659380939
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 01089840A (IN)
Specialties & taxonomies
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
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
6 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
414 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 | 100 | $86 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 57 | $122 |
| Ultrasound Measurement of Bladder Capacity After Voiding51798 | 48 | $10 |
| Diagnostic Exam of Bladder and Urethra Using an Endoscope52000 | 45 | $220 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 36 | $72 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 277 | 80 |
| Finasteride | 134 | 40 |
| Mirabegronbrand: Myrbetriq | 61 | 19 |
| Ciprofloxacin Hcl | 53 | 46 |
| Alfuzosin Hclbrand: Alfuzosin Hcl Er | 52 | 14 |
| Oxybutynin Chloride | 45 | 13 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 42 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,010 across 48 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 (5)
- 7950 W Jefferson BlvdFort Wayne, IN 46804-4140Phone: (260) 435-7001
- 601 John St Ste M-318Kalamazoo, MI 49007-5383Phone: (269) 349-9745
- 42 N Saint Joseph AveNiles, MI 49120-2203Phone: (269) 684-5447
- 3875 Bay Rd Ste 2sSaginaw, MI 48603-2423Phone: (989) 583-5370Fax: (989) 583-1872
- 1234 Napier AveSaint Joseph, MI 49085-2112Phone: (269) 983-3455
Registry dates
- Enumerated
- 2006-08-05
- Last updated
- 2025-12-16
- Certified
- 2025-12-16
Frequently asked questions
- What is Markian Iwaszko's NPI number?
- Markian Iwaszko's National Provider Identifier (NPI) is 1659380939, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Markian Iwaszko's specialty?
- Markian Iwaszko is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Markian Iwaszko located?
- Markian Iwaszko's practice location on file with NPPES is 1000 E Paris Ave Se Ste 230, Grand Rapids, MI 49546-3680.
- What is Markian Iwaszko's phone number?
- The practice phone number listed in the NPPES registry for Markian Iwaszko is (616) 949-4340.
- Does Markian Iwaszko accept Medicare?
- Markian Iwaszko is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Markian Iwaszko's NPI active?
- Yes — Markian Iwaszko's NPI (1659380939) is active in the NPPES registry as of the last update on 2025-12-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.