NPPES file of Aug 9, 2026

Michael Cassidy, M.D.

Specialist · Berkeley, CA

Michael Cassidy, M.D. is a specialist with a practice address in Berkeley, California, and NPI 1780673442, issued on Oct 17, 2005. Check the license (California G330960, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1780673442
Name
Michael Cassidy
Credential
M.D.
Primary taxonomy
Specialist 174400000X
License number
G330960 CA
Self-reported in NPPES; status is on the state search
Practice location
2001 Dwight Way, Berkeley, CA 94704
Phone
(510) 204-1591
Enumerated
Oct 17, 2005
Record last updated
Jul 13, 2026
Fax
(510) 204-6440
Medicaid ID
GR0089940 CA
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 2001 Dwight Way

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Neal Anzai, M.D.Psychiatry Physician1750597688
  2. Mary-Ellis Arnold, R.N., A.N.P.Adult Health Nurse Practitioner1619018322
  3. Kate Bartholomew, LCSWClinical Social Worker1881647196
  4. Rajesh Behl, M.D.Hematology & Oncology Physician1104844174
  5. Anne BosshardtInternal Medicine Physician1841435427
  6. Erika Bruce, NPAdult Health Nurse Practitioner1881694198

Verify Michael Cassidy in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license G330960    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
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98% fewer Medicare Part D claims than the average specialist in 2024

28 Medicare Part D claims, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D.

  1. Michael Cassidy28
  2. Specialty average1,380

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.

Specialist providers in California

There are 5,749 specialist records in California.

All 5,749 in California → Every provider in Berkeley →

Other specialist records in California

  1. Fatemeh Abbasi, PTVan Nuys, CA1558496760
  2. Erlinda Abcede, M.D.Cudahy, CA1831228675
  3. Maher Abdallah, M.D.Palm Springs, CA1205988011
  4. Farinaz AbdiSan Marcos, CA1063153963
  5. Mai Abe, LESanta Monica, CA1609405158
  6. Hamid Abedi, HEARING AID SPECIALISan Diego, CA1659410744
  7. Jonas AbellaSan Francisco, CA1679760938
  8. Shreedhar Abhyankar, M.D.Indio, CA1861530669
  9. Elaine AbichRiverside, CA1780458927
  10. Mussarat Abidi, MDLadera Ranch, CA1053307769

Common questions

What is Michael Cassidy, M.D.'s NPI number?

Michael Cassidy, M.D.'s National Provider Identifier (NPI) is 1780673442, issued on Oct 17, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Michael Cassidy, M.D. located?

The NPPES record lists a practice address at 2001 Dwight Way, Berkeley, CA, 94704. Phone: (510) 204-1591. Providers update this record themselves, so call before visiting.

How can I verify Michael Cassidy, M.D.'s license?

NPPES lists California license number G330960, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Michael Cassidy, M.D. prescribe under Medicare Part D?

In 2024, Michael Cassidy, M.D. had 28 Medicare Part D claims; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.