Walt Marquardt, MD
Interventional Cardiology Physician · Sacramento, CA
Walt Marquardt, MD is an interventional cardiology physician with a practice address in Sacramento, California, and NPI 1881766962, issued on Nov 14, 2006. Check the license (California G59664, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Walt Marquardt
- Credential
- MD
- Primary taxonomy
- Interventional Cardiology Physician 207RI0011X
- License number
- G59664 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3941 J Street, Sacramento, CA 95819
- Phone
- (916) 736-2323
- Enumerated
- Nov 14, 2006
- Record last updated
- Jan 30, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (916) 736-0620
- Medicaid IDs
- 00G596640 CA
GR0068230 CA
GR0068231 CA
GR0068235 CA - Medicare enrollment
- Enrolled (PECOS I20040330001049); accepts Medicare assignment
- Medical or professional school
- University Of Pittsburgh School Of Medicine, 1981
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest interventional cardiology physician records → All 632 in California → Look up another NPI →
Also registered at 3941 J Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Foerster, MDCardiovascular Disease Physician1205908373
- Christopher Hart, PA-CPhysician Assistant1225302219
- Ralph Koldinger, M.D.Gastroenterology Physician1952421703
- Joseph Kozina, MDInterventional Cardiology Physician1710059894
- Christopher Neubuerger, MDOrthopaedic Surgery Physician1023103793
- Padraig Oneill, MDClinical Cardiac Electrophysiology Physician1629140702
Verify Walt Marquardt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G59664Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% more Medicare Part D claims than the average interventional cardiology physician in 2024
4,564 Medicare Part D claims for 810 beneficiaries, against an average of 3,179 among the 6,605 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium407 claims
- Clopidogrel392 claims
- Eliquis336 claims
- Losartan Potassium324 claims
- Metoprolol Succinate298 claims
- Rosuvastatin Calcium206 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 96.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $3,118.97
77 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 6,394 providers of this specialty with any payment received $7,062.29 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Dignity Health Medical FoundationGrass Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Walt Marquardt among 632 interventional cardiology physician records in California
Walt Marquardt, MD is one of 632 interventional cardiology physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 52% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated1981 · median 2001 among the 526 with a school on file
- Record last updated2015 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0011X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Interventional Cardiology Physician providers in California
There are 632 interventional cardiology physician records in California.
All 632 in California → Every provider in Sacramento → Interventional Cardiology Physician nationwide →
The 8 interventional cardiology physician records with the nearest ZIP codes
- Joseph Kozina, MDSacramento, CA 958191710059894
- Sailesh Shah, M.D.Sacramento, CA 958191881681930
- Surabhi Atreja, M.DSacramento, CA 958171528233418
- Manoj Kesarwani, M.D.Sacramento, CA 958171386836484
- Femi Philip, M.D.Sacramento, CA 958171285809822
- Pei-Hsiu Huang, M.D.Sacramento, CA 958161992901573
- Robert Kirchner, M.D.Sacramento, CA 958161508851957
- David Roberts, M.DSacramento, CA 958161780635607
Common questions
What is Walt Marquardt, MD's NPI number?
Walt Marquardt, MD's National Provider Identifier (NPI) is 1881766962, issued on Nov 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Walt Marquardt, MD located?
The NPPES record lists a practice address at 3941 J Street, Sacramento, CA, 95819. Phone: (916) 736-2323. Providers update this record themselves, so call before visiting.
How can I verify Walt Marquardt, MD's license?
NPPES lists California license number G59664, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Walt Marquardt, MD prescribe under Medicare Part D?
In 2024, Walt Marquardt, MD had 4,564 Medicare Part D claims for 810 beneficiaries; the average among interventional cardiology physician prescribers was 3,179. Part D covers Medicare prescriptions only.
What is Walt Marquardt, MD's MIPS final score?
The 2023 MIPS final score is 96.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.