NPPES file of Aug 9, 2026

David Lee Cassidy, M.D.

Diagnostic Radiology Physician · Fountain Valley, CA

David Lee Cassidy, M.D. is a diagnostic radiology physician with a practice address in Fountain Valley, California, and NPI 1376591594, issued on May 4, 2006. Check the license (California C28354, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1376591594
Name
David Lee Cassidy
Credential
M.D.
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License number
C28354 CA
Self-reported in NPPES; status is on the state search
Practice location
18944 Mount Cimarron St, Fountain Valley, CA 92708
Phone
(714) 968-7706
Enumerated
May 4, 2006
Record last updated
Nov 27, 2007 (not updated in 19 years: call before relying on the address or phone)
Medicaid ID
00C283540 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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8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →

Verify David Lee Cassidy in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license C28354    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
Open the California license search

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David Lee Cassidy among 4,500 diagnostic radiology physician records in California

David Lee Cassidy, M.D. is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 7% of them.

  • NPI issued2006 · 7% of these records are older, 52% newer
  • In a Medicare fileNo · 74% of these records are
  • In the CMS Doctors and Clinicians fileNo · 70% of these records are
  • Record last updated2007 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Diagnostic Radiology Physician providers in California

There are 4,500 diagnostic radiology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 4,500 in California → Every provider in Fountain Valley → Diagnostic Radiology Physician nationwide →

The 8 diagnostic radiology physician records with the nearest ZIP codes

  1. John Belville, M.D.Fountain Valley, CA 927081114978277
  2. Anita Boorman, DOFountain Valley, CA 927081720083447
  3. Ronald Frug, MDFountain Valley, CA 927081285722488
  4. William Grandolfo, M.D.Fountain Valley, CA 927081649596479
  5. David Mai, M.D.Fountain Valley, CA 927081962589242
  6. Richard Reitherman, MEDICAL DOCTORFountain Valley, CA 927081528058351
  7. Mehran Tirandaz, M.D.Fountain Valley, CA 927081538119540
  8. Robert Turner, M.D.Fountain Valley, CA 927081699726182

Common questions

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

David Lee Cassidy, M.D.'s National Provider Identifier (NPI) is 1376591594, issued on May 4, 2006. An NPI identifies a provider in billing; it is not a license.

Where is David Lee Cassidy, M.D. located?

The NPPES record lists a practice address at 18944 Mount Cimarron St, Fountain Valley, CA, 92708. Phone: (714) 968-7706. Providers update this record themselves, so call before visiting.

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

NPPES lists California license number C28354, 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. 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.