Susan Ziolkowski, MD
NPI 1841566932 · Nephrology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Susan Ziolkowski, MD is a Nephrology Physician provider in Stanford, CA (NPI 1841566932).
Provider details
- NPI number
- 1841566932
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A135969 (CA)
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
14 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
693 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 123 | $211 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 115 | $88 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 109 | $55 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 87 | $152 |
| Dialysis Procedure Including 1 Evaluation90945 | 40 | $98 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 102 | 29 |
| Amlodipine Besylate | 76 | 25 |
| Calcitriol | 72 | 20 |
| Furosemide | 56 | 21 |
| Empagliflozinbrand: Jardiance | 40 | 11 |
| Carvedilol | 27 | — |
| Atorvastatin Calcium | 27 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$254 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
- 2012-03-22
- Last updated
- 2024-04-24
- Certified
- 2024-04-24
Frequently asked questions
- What is Susan Ziolkowski's NPI number?
- Susan Ziolkowski's National Provider Identifier (NPI) is 1841566932, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Susan Ziolkowski's specialty?
- Susan Ziolkowski is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Susan Ziolkowski located?
- Susan Ziolkowski's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Susan Ziolkowski's phone number?
- The practice phone number listed in the NPPES registry for Susan Ziolkowski is (650) 723-4000.
- Does Susan Ziolkowski accept Medicare?
- Susan Ziolkowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Susan Ziolkowski's NPI active?
- Yes — Susan Ziolkowski's NPI (1841566932) is active in the NPPES registry as of the last update on 2024-04-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.