John F. Cassidy, MD
Neurology Physician · Santa Rosa, CA
John F. Cassidy, MD is a neurology physician with a practice address in Santa Rosa, California, and NPI 1053495036, issued on Oct 25, 2006. Check the license (California G22847, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John F. Cassidy
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- G22847 CA
Self-reported in NPPES; status is on the state search - Practice location
- 401 Bicentennial Way, Santa Rosa, CA 95403
- Phone
- (707) 571-4000
- Enumerated
- Oct 25, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00G228470 CA
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Also registered at 401 Bicentennial Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anna Ackerman, RNRegistered Nurse1376409409
- Patricia AdamsPhysical Therapist1124971825
- Hugo Aguilar, PHARMDPharmacist1992389134
- Heather Aiello, OTR/LOccupational Therapist1851155022
- Sandra Akrawi, REGISTERED DIETITIANRegistered Dietitian1790821031
- Miguel Alcala, LCSWClinical Social Worker1629857891
Verify John F. Cassidy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G22847Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $18.37
1 payment: food and beverage; the largest payer was Pfizer Inc. The 10,858 providers of this specialty with any payment received $8,318.07 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.
John F. Cassidy among 2,339 neurology physician records in California
John F. Cassidy, MD is one of 2,339 neurology physician records with a practice address in California. 81% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2007 · 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 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California.
All 2,339 in California → Every provider in Santa Rosa → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Max Duncan, D.O.Santa Rosa, CA 954031114066974
- Mahsa Eskian, MDSanta Rosa, CA 954031437893823
- Jet Ho, MDSanta Rosa, CA 954031194894394
- Sea Jin Kim, M.D.Santa Rosa, CA 954031649471202
- John Mendius, M.D.Santa Rosa, CA 954031295765881
- Jerome Chin, M.D. PH.D.Santa Rosa, CA 954041992837496
- Sidney Kurn, M.D.Santa Rosa, CA 954041588793962
- Stella Lai, MDSanta Rosa, CA 954051588906663
Common questions
What is John F. Cassidy, MD's NPI number?
John F. Cassidy, MD's National Provider Identifier (NPI) is 1053495036, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John F. Cassidy, MD located?
The NPPES record lists a practice address at 401 Bicentennial Way, Santa Rosa, CA, 95403. Phone: (707) 571-4000. Providers update this record themselves, so call before visiting.
How can I verify John F. Cassidy, MD's license?
NPPES lists California license number G22847, 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.
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.