Anne Grzegorczyk, M.D.
Critical Care Medicine (Internal Medicine) Physician · Walnut Creek, CA
Anne Grzegorczyk, M.D. is a critical care medicine (internal medicine) physician with a practice address in Walnut Creek, California, and NPI 1720434004, issued on May 5, 2016. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Anne Grzegorczyk
- Credential
- M.D.
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- Practice location
- 2700 Ygnacio Valley RD Ste 100, Walnut Creek, CA 94598
- Phone
- (925) 939-3050
- Enumerated
- May 5, 2016
- Entity
- Type 1 · individual
Also registered at 2700 Ygnacio Valley RD Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maryam Amini, MDFamily Medicine Physician1245402072
- Elvio Ardilles, MDPulmonary Disease Physician1518905322
- Vala Berjis, M.D.Critical Care Medicine (Internal Medicine) Physician1023135761
- George Juan, M.D.Critical Care Medicine (Internal Medicine) Physician1619273364
- Matthew LyonsCritical Care Medicine (Internal Medicine) Physician1457714933
- Ming-Tyh Maa, M.D.Critical Care Medicine (Internal Medicine) Physician1073718722
Verify Anne Grzegorczyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
70% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
333 Medicare Part D claims for 81 beneficiaries, against an average of 1,103 among the 4,049 providers of this specialty who prescribed in Part D. Brand-name drugs were 36% of claims.
Most prescribed
- Albuterol Sulfate Hfa49 claims
- Trelegy Ellipta47 claims
- Montelukast Sodium33 claims
- Fluticasone Propionate31 claims
- Prednisone18 claims
- Breo Ellipta13 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 practice group's Medicare quality score for 2023: 99.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $706.36
11 payments, mostly food and beverage; the largest payer was Inspire Medical Systems, Inc.. The 3,336 providers of this specialty with any payment received $4,158.57 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.
One hospital or facility affiliation
- Muir Pulmonary Critical CareWalnut Creek, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Critical Care Medicine (Internal Medicine) Physician providers in California
There are 714 critical care medicine (internal medicine) physician records in California.
Other critical care medicine (internal medicine) physician records in California
- Loui Abdelghani, M.DStockton, CA1912161787
- Moustapha Abidali, DOGlendora, CA1669810123
- Mohammed Abo Khamis, M.D.Modesto, CA1508098419
- Henry Abrons, M.D.Berkeley, CA1821001470
- Noman Absar, MDVallejo, CA1205908951
- Allen Adams, M.D.Los Angeles, CA1700862794
- Jacob Adams, DONovato, CA1558595090
- Jason Adams, M.D.Sacramento, CA1134367568
- Olufemi Adenuga, M.D, MPHBaldwin Park, CA1134389125
- Ajay Adial, M.DSan Jacinto, CA1568726594
Common questions
What is Anne Grzegorczyk, M.D.'s NPI number?
Anne Grzegorczyk, M.D.'s National Provider Identifier (NPI) is 1720434004, issued on May 5, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Anne Grzegorczyk, M.D. located?
The NPPES record lists a practice address at 2700 Ygnacio Valley RD Ste 100, Walnut Creek, CA, 94598. Phone: (925) 939-3050. Providers update this record themselves, so call before visiting.
How can I verify Anne Grzegorczyk, M.D.'s license?
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 Anne Grzegorczyk, M.D. prescribe under Medicare Part D?
In 2024, Anne Grzegorczyk, M.D. had 333 Medicare Part D claims for 81 beneficiaries; the average among critical care medicine (internal medicine) physician prescribers was 1,103. Part D covers Medicare prescriptions only.
What is Anne Grzegorczyk, M.D.'s Medicare quality score?
The 2023 MIPS final score is 99.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.