Timothy F. O'Neill, M.D.
Cardiovascular Disease Physician · Los Alamitos, CA
Timothy F. O'Neill, M.D. is a cardiovascular disease physician with a practice address in Los Alamitos, California, and NPI 1467493155, issued on Jun 10, 2006. Check the license (California G65895, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Timothy F. O'Neill
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- G65895 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5300 Katella Ave, Los Alamitos, CA 90720
- Phone
- (562) 430-7533
- Enumerated
- Jun 10, 2006
- Record last updated
- Jul 21, 2022
- Fax
- (562) 430-8055
- Medicaid ID
- 00G658950 CA
- Entity
- Type 1 · individual
Also registered at 5300 Katella Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Carlos ArguedasInternal Medicine Physician1023075579
- Ramandeep Brar, M.D.Cardiovascular Disease Physician1821165549
- Valerie Cacho, MDSleep Medicine (Internal Medicine) Physician1528296845
- Stuart Fischer, M.D.Cardiovascular Disease Physician1083656086
- Steven Forman, M.D.Cardiovascular Disease Physician1023059763
- Diana GlovaciCardiovascular Disease Physician1366805590
Verify Timothy F. O'Neill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G65895Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
1,956 Medicare Part D claims for 333 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Eliquis282 claims
- Metoprolol Succinate211 claims
- Atorvastatin Calcium132 claims
- Losartan Potassium90 claims
- Amlodipine Besylate88 claims
- Ezetimibe81 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): 86.3 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: $632.26
29 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 16,686 providers of this specialty with any payment received $3,819.56 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.
Cardiovascular Disease Physician providers in California
There are 2,574 cardiovascular disease physician records in California.
Other cardiovascular disease physician records in California
- Abdul Abbasi, MDLong Beach, CA1710071717
- Siddique Abbasi, MDThousand Oaks, CA1528076718
- Lillian Abdelmalek, MDSacramento, CA1881343796
- Robin Abdelmalik, M.D. FACCTemecula, CA1275656662
- Roberto Abdelnur, MDEl Centro, CA1982648606
- Sohail Abdi-Moradi, M.D.Moorpark, CA1376862938
- Nadia Abelhad, M.D.Chula Vista, CA1619400801
- Georges Abou Rjaili, MDRiverside, CA1073896544
- Jamil Aboulhosn, MDLos Angeles, CA1356382717
- Maria Abraham, M.D.San Francisco, CA1669436960
Common questions
What is Timothy F. O'Neill, M.D.'s NPI number?
Timothy F. O'Neill, M.D.'s National Provider Identifier (NPI) is 1467493155, issued on Jun 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Timothy F. O'Neill, M.D. located?
The NPPES record lists a practice address at 5300 Katella Ave, Los Alamitos, CA, 90720. Phone: (562) 430-7533. Providers update this record themselves, so call before visiting.
How can I verify Timothy F. O'Neill, M.D.'s license?
NPPES lists California license number G65895, 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 Timothy F. O'Neill, M.D. prescribe under Medicare Part D?
In 2024, Timothy F. O'Neill, M.D. had 1,956 Medicare Part D claims for 333 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is Timothy F. O'Neill, M.D.'s MIPS final score?
The 2023 MIPS final score is 86.3 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.