Michelle Joanne Di Fiore, M.D.
Rheumatology Physician · Santa Cruz, CA
Michelle Joanne Di Fiore, M.D. is a rheumatology physician with a practice address in Santa Cruz, California, and NPI 1790171072, issued on Apr 13, 2015. Check the license (California A149040, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michelle Joanne Di Fiore
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- A149040 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1595 Soquel Dr Ste 411, Santa Cruz, CA 95065
- Phone
- (831) 475-8834
- Enumerated
- Apr 13, 2015
- Record last updated
- Jul 18, 2022
- Fax
- (831) 462-2058
- Medicare enrollment
- Enrolled (PECOS I20180514002887); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1595 Soquel Dr Ste 411
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Aaron Pardini, M.D.Endocrinology, Diabetes & Metabolism Physician1235147562
- Charulata Ramaprasad, M.D.Infectious Disease Physician1528269925
- Sunita Singh, MDInfectious Disease Physician1649508581
Verify Michelle Joanne Di Fiore in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A149040Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,202 Medicare Part D claims for 228 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone287 claims
- Hydroxychloroquine Sulfate142 claims
- Methotrexate131 claims
- Meloxicam92 claims
- Colchicine76 claims
- Leflunomide52 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: $565.69
23 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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
- Sutter Bay Medical FoundationFremont, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
Other rheumatology physician records in California
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- Mai Abdelnabi, MDSan Francisco, CA1013394980
- Brian Abe, MD, PHDStanford, CA1104262708
- Thomas Abel, MDMonte Sereno, CA1871679399
- Feruza AbraamyanRoseville, CA1124769278
- Thomas Adamson, M.D.San Diego, CA1639187057
- Sana Afroz, MDMoreno Valley, CA1356724074
- Ishita Aggarwal, MDSan Francisco, CA1518385699
- Atul Agrawal, MDAntioch, CA1528146016
- Bikramjit Ahluwalia, MDApple Valley, CA1669402467
Common questions
What is Michelle Joanne Di Fiore, M.D.'s NPI number?
Michelle Joanne Di Fiore, M.D.'s National Provider Identifier (NPI) is 1790171072, issued on Apr 13, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Michelle Joanne Di Fiore, M.D. located?
The NPPES record lists a practice address at 1595 Soquel Dr Ste 411, Santa Cruz, CA, 95065. Phone: (831) 475-8834. Providers update this record themselves, so call before visiting.
How can I verify Michelle Joanne Di Fiore, M.D.'s license?
NPPES lists California license number A149040, 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 Michelle Joanne Di Fiore, M.D. prescribe under Medicare Part D?
In 2024, Michelle Joanne Di Fiore, M.D. had 1,202 Medicare Part D claims for 228 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Michelle Joanne Di Fiore, M.D.'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.