John W. Cassidy, M.D.
Brain Injury Medicine (Psychiatry & Neurology) Physician · Houston, TX
John W. Cassidy, M.D. is a brain injury medicine (psychiatry & neurology) physician with a practice address in Houston, Texas, and NPI 1114097748, issued on Nov 9, 2006. Check the license (Texas H3450, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John W. Cassidy
- Credential
- M.D.
- Primary taxonomy
- Brain Injury Medicine (Psychiatry & Neurology) Physician 2084P0301X
- License number
- H3450 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1 Riverway, Houston, TX 77056
- Phone
- (713) 355-6111
- Enumerated
- Nov 9, 2006
- Record last updated
- Sep 19, 2022
- Fax
- (713) 355-6822
- Entity
- Type 1 · individual
1 nearest brain injury medicine (psychiatry & neurology) physician record → All 2 in Texas → Look up another NPI →
Also registered at 1 Riverway
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Courtney Toomey, M.D.Physical Medicine & Rehabilitation Physician1780846394
Verify John W. Cassidy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license H3450Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% fewer Medicare Part D claims than the average brain injury medicine (psychiatry & neurology) physician in 2024
402 Medicare Part D claims for 12 beneficiaries, against an average of 506 among the 6 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Clozapine30 claims
- Metformin Hcl28 claims
- Omeprazole24 claims
- Atorvastatin Calcium17 claims
- Alfuzosin Hcl Er12 claims
- Bupropion Xl12 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.
Brain Injury Medicine (Psychiatry & Neurology) Physician providers in Texas
There are 2 brain injury medicine (psychiatry & neurology) physician records in Texas.
All 2 in Texas → Every provider in Houston → Brain Injury Medicine (Psychiatry & Neurology) Physician nationwide →
The 1 brain injury medicine (psychiatry & neurology) physician record with the nearest ZIP codes
- Mayur PatelSan Antonio, TX 782491134656903
Common questions
What is John W. Cassidy, M.D.'s NPI number?
John W. Cassidy, M.D.'s National Provider Identifier (NPI) is 1114097748, issued on Nov 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John W. Cassidy, M.D. located?
The NPPES record lists a practice address at 1 Riverway, Houston, TX, 77056. Phone: (713) 355-6111. Providers update this record themselves, so call before visiting.
How can I verify John W. Cassidy, M.D.'s license?
NPPES lists Texas license number H3450, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John W. Cassidy, M.D. prescribe under Medicare Part D?
In 2024, John W. Cassidy, M.D. had 402 Medicare Part D claims for 12 beneficiaries; the average among brain injury medicine (psychiatry & neurology) physician prescribers was 506. 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.
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.