Ilan Zawadzki, MD
NPI 1538111521 · Nephrology Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ilan Zawadzki, MD is a Nephrology Physician provider in Seattle, WA (NPI 1538111521).
Provider details
- NPI number
- 1538111521
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD00021873 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 99 | 37 |
| Sevelamer Carbonate | 58 | 17 |
| Furosemide | 53 | 22 |
| Amlodipine Besylate | 38 | 19 |
| Calcitriol | 32 | 12 |
| Potassium Chloride | 29 | — |
| Prednisone | 27 | — |
| Torsemide |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-17
- Last updated
- 2021-05-12
- Certified
- 2021-05-12
Frequently asked questions
- What is Ilan Zawadzki's NPI number?
- Ilan Zawadzki's National Provider Identifier (NPI) is 1538111521, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ilan Zawadzki's specialty?
- Ilan Zawadzki is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Ilan Zawadzki located?
- Ilan Zawadzki's practice location on file with NPPES is 125 16th Ave E, Seattle, WA 98112-5211.
- What is Ilan Zawadzki's phone number?
- The practice phone number listed in the NPPES registry for Ilan Zawadzki is (206) 326-3000.
- Does Ilan Zawadzki accept Medicare?
- Ilan Zawadzki is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ilan Zawadzki's NPI active?
- Yes — Ilan Zawadzki's NPI (1538111521) is active in the NPPES registry as of the last update on 2021-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.