Dr. Susan L. Ziolkowski, MD

  • Stanford, CA
  • Nephrologist
NPI1841566932PAC ID5991044422
Medicare services, 2024
693
Medicare patients, 2024
321
Part D claims, 2024
905
Publications
16
MIPS score, 2024
89
Practice address
300 Pasteur Drive, Stanford, CA 94305
Practice phone
Call (650) 723-4000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Stanford Hospital at 300 Pasteur Drive

Hospital · Stanford, California

See all 6 affiliations

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Dr. Susan L. Ziolkowski is a nephrologist in Stanford, California

Dr. Ziolkowski practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.

Dr. Ziolkowski's NPI, 1841566932, was assigned on March 22, 2012. Dr. Ziolkowski graduated from SUNY Upstate Medical University in 2012. Dr. Ziolkowski holds California license A135969.

NPI and contact details
Medicare PAC ID
5991044422
NPI enumeration date
March 22, 2012
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(650) 723-4000
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Female
Estimated age
40
Medical school graduation
2012

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Susan L. Ziolkowski practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California

Dr. Ziolkowski's primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.

Source: Dmand AI Affiliation Data

Dr. Susan L. Ziolkowski is affiliated with 3 sites of care and 3 medical groups

Dr. Ziolkowski's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dr. Ziolkowski is also affiliated with Stanford Health Care Tri-Valley. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Ziolkowski to 1 more hospital and 2 medical groups, each named with a free account. Dr. Ziolkowski's employer is on file too: a hospital.

See all 6 affiliations for Dr. Ziolkowski

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Susan L. Ziolkowski's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ziolkowski practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Stanford Hospital at 300 Pasteur DriveAvailable with a free account
+2 more sites and 2 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Susan L. Ziolkowski is one of 1,401 nephrologists in California

Nephrology is Dr. Ziolkowski's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Ziolkowski is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Ziolkowski's licenses on file in 3 states: California, New York and Rhode Island.

Specialties and state licenses

  • Nephrology, CaliforniaPrimaryLicense A135969 · 2015 to 2026 · taxonomy 207RN0300X
  • New York license2014 to 2016
  • Rhode Island license2015

Clinical focus

Dmand AI lists acute kidney failure, chronic hypertension, chronic kidney disease, fluid and electrolyte imbalances, kidney disease, kidney stone disease, low blood pressure and parathyroid gland disorder among the conditions Dr. Ziolkowski treats.

Nephrologists near Dr. Ziolkowski

Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Susan L. Ziolkowski billed Medicare for 693 services in 2024

CMS data shows 693 Medicare services from Dr. Ziolkowski across 12 procedure codes in 2024, for 321 Medicare patients. Medicare paid $67,030 for them.

Medicare services, 2024693
Medicare patients321
Paid by Medicare$67,030
Procedure codes12

Dr. Ziolkowski's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 7322024: 62714%
Tests and treatments
2023: 1072024: 6638%

Where Dr. Ziolkowski's Medicare services took place, 2024

  • In an office27139%
  • In a facility42261%

Dr. Ziolkowski compared with the California median for nephrologists, 2024

  • Dr. Ziolkowski
  • California median
Medicare services
693vs 1,08436% below
Medicare patients
321vs 307Close to median
Part D claims
652vs 95532% below

Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.

Dr. Ziolkowski's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Ziolkowski

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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ziolkowski and other nephrologists in California.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Susan L. Ziolkowski treated 321 Medicare patients in 2024, average age 72

CMS counts 321 Medicare patients who saw Dr. Ziolkowski in 2024. The largest group is 65 to 74, with 111 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 35% are also on Medicaid. Their average risk score is 4.32, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Ziolkowski's median patient age at 66, with 37% women.

Medicare patients, 2024321
Average age72
Average risk score4.32
Also on Medicaid35%

Dr. Ziolkowski's Medicare patients by age, 2024

Dr. Ziolkowski's Medicare patients by sex, 2024

  • Women12940%
  • Men19260%

Chronic conditions among Dr. Ziolkowski's Medicare patients, 2024

  1. Chronic kidney disease75%
  2. High blood pressure75%
  3. High cholesterol75%
  4. Diabetes49%
  5. Heart failure44%
  6. Ischemic heart disease44%
  7. Arthritis40%
  8. Atrial fibrillation39%

Share of Medicare patients with each condition. A patient can have several.

Dr. Ziolkowski's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 66

Patient panel by sex, all payers

  • Women37%
  • Men61%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Susan L. Ziolkowski wrote 905 Medicare Part D claims in 2024

In 2024, Dr. Ziolkowski wrote 905 Medicare Part D claims for 157 patients. 89% of them were for generic drugs. CMS names the drug for 652 of them, across 22 drugs with 11 or more claims each, at $81,468 in total drug cost. In 2023, CMS named 548 claims across 17 drugs.

Part D claims, 2024905
Drugs named by CMS22
Total drug cost$81,468
Part D patients157

Dr. Ziolkowski's Part D claims by kind of drug, 2024

  • Generic802 claims89%
  • Brand-name103 claims11%

Dr. Ziolkowski's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Ziolkowski's Part D claims, 2024

  • Antibiotics1%11 of 905 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 5482024: 65219%

Drugs named by CMS: 22 in 2024, 17 in 2023.

See all prescribing by Dr. Ziolkowski

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Susan L. Ziolkowski scored 89 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Ziolkowski for performance year 2024, reported as part of a group. Dr. Ziolkowski accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ziolkowski as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Ziolkowski's MIPS scores, performance year 2024

  • 89of 100Final score
  • 87.1of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 70of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. Susan L. Ziolkowski has 16 publications on record

Dmand AI links 16 papers to Dr. Ziolkowski, published from 2014 to 2024. 2021 was the busiest year, with 3. The most frequent topics are Body Composition, Kidney Failure, Chronic and Nutrition Surveys. Dr. Ziolkowski has published most often in J Ren Nutr. Dr. Ziolkowski's most frequent co-authors are Mary Beth Leonard, MD, Glenn Matthew Chertow, MD and Ala Abudayyeh, MD.

Papers16
Years published2014 to 2024

Dr. Ziolkowski's papers by year, 2014 to 2024

Topics Dr. Ziolkowski writes about most

  • Body Composition
  • Kidney Failure, Chronic
  • Nutrition Surveys
  • Absorptiometry, Photon
  • Adiposity
  • Renal Insufficiency, Chronic
  • Body Mass Index
  • Obesity

Dr. Ziolkowski's most frequent co-authors

Recent publications by Dr. Ziolkowski

See all 16 publications and co-authors

See who Dr. Ziolkowski researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ziolkowski works with, so you can find a warm path to the right nephrologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Susan L. Ziolkowski received $254 in industry payments in 2024

CMS Open Payments shows 2 general payments to Dr. Ziolkowski from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $254.

Companies that paid Dr. Ziolkowski the most, 2024 to 2024

Share is of all general payments to this clinician.

See all payments to Dr. Ziolkowski

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Susan L. Ziolkowski graduated from SUNY Upstate Medical University

Dr. Ziolkowski graduated from SUNY Upstate Medical University in 2012.

  1. Medical schoolSUNY Upstate Medical University
  2. Board certified in internal medicineAmerican Board of Internal Medicine
  3. Board certified in nephrologyAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Susan L. Ziolkowski accepts plans from 8 insurance carriers

Dr. Ziolkowski is in network with 8 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 5. Check the plan with the practice before a visit.

  • Aetna
  • Elevance
  • Blue Cross Blue Shield of Michigan
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • United Healthcare
  • Blue Cross and Blue Shield of Kansas City
  • CMS Medicare

Plan types Dr. Ziolkowski accepts, by number of carriers

  1. PPO5
  2. HMO4
  3. Medicare4
  4. POS4
  5. EPO3

Source: Dmand AI Insurance Network Data

Sources for Dr. Susan L. Ziolkowski's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Susan L. Ziolkowski

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Susan L. Ziolkowski's NPI number?

Dr. Susan L. Ziolkowski's NPI number is 1841566932. It was assigned on March 22, 2012, and it is active in the NPI Registry.

What kind of doctor is Dr. Susan L. Ziolkowski?

Dr. Susan L. Ziolkowski is a nephrologist in Stanford, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).

Where does Dr. Susan L. Ziolkowski practice?

Dr. Ziolkowski practices at 300 Pasteur Drive, Stanford, CA 94305. Dr. Ziolkowski's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dmand AI also links Dr. Ziolkowski to 1 hospital and 2 medical groups.

What is Dr. Susan L. Ziolkowski's office phone number?

The practice phone on file for Dr. Ziolkowski is (650) 723-4000.

What is Dr. Susan L. Ziolkowski's medical license number?

Dr. Ziolkowski holds California license A135969, one of the licenses on file in 3 states.

Which states has Dr. Susan L. Ziolkowski been licensed in?

Dmand AI has state licenses on file for Dr. Ziolkowski in California (2015 to 2026), New York (2014 to 2016) and Rhode Island (2015).

Which hospitals is Dr. Susan L. Ziolkowski affiliated with?

Dr. Ziolkowski practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California. Dr. Ziolkowski is also affiliated with Stanford Health Care Tri-Valley. Dmand AI links Dr. Ziolkowski to 1 more hospital.

What medical group is Dr. Susan L. Ziolkowski part of?

Dr. Ziolkowski is linked to Stanford Health Care. Dmand AI links Dr. Ziolkowski to 2 more medical groups.

Does Dr. Susan L. Ziolkowski accept Medicare?

Yes. CMS data shows Dr. Ziolkowski billed Medicare for 693 services in 2024, and Dr. Ziolkowski accepts Medicare assignment.

Does Dr. Susan L. Ziolkowski offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Ziolkowski as offering telehealth services.

Show 11 more questionsShow fewer questions

What is Dr. Susan L. Ziolkowski's MIPS score?

Dr. Ziolkowski's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.

How many Medicare patients does Dr. Susan L. Ziolkowski see?

CMS counts 321 Medicare patients who saw Dr. Ziolkowski in 2024, with an average age of 72.

Is Dr. Susan L. Ziolkowski board certified?

Yes. Dr. Ziolkowski is board certified in internal medicine by the American Board of Internal Medicine.

What services does Dr. Susan L. Ziolkowski bill to Medicare?

In 2024, Dr. Ziolkowski's most billed Medicare services were office visit, established patient (99215), hospital inpatient care (99232) and office visit, established patient (99214).

Where did Dr. Susan L. Ziolkowski go to medical school?

Dr. Ziolkowski graduated from SUNY Upstate Medical University in 2012.

What drugs does Dr. Susan L. Ziolkowski prescribe most?

In 2024 Medicare Part D data, Dr. Ziolkowski's most prescribed drugs by claims were Losartan Potassium, Amlodipine Besylate and Calcitriol.

Has Dr. Susan L. Ziolkowski received payments from drug or device companies?

CMS Open Payments shows $254 in general payments to Dr. Ziolkowski from 1 company from 2024 to 2024. The largest total came from Novartis Pharmaceuticals Corporation.

How long has Dr. Susan L. Ziolkowski been practicing?

Dr. Ziolkowski graduated from medical school in 2012, 14 years ago.

Does Dr. Susan L. Ziolkowski do research?

Dmand AI links 16 publications to Dr. Ziolkowski, published from 2014 to 2024.

Who does Dr. Susan L. Ziolkowski publish with?

Dr. Ziolkowski's most frequent co-authors are Mary Beth Leonard, MD (7 shared papers), Glenn Matthew Chertow, MD (3 shared papers) and Ala Abudayyeh, MD (2 shared papers).

What insurance does Dr. Susan L. Ziolkowski accept?

Dr. Ziolkowski is in network with 8 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 5. Check the plan with the practice before a visit.

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