Timothy M. Chen, MD
Family Medicine Physician · Oxnard, CA
Timothy M. Chen, MD is a family medicine physician with a practice address in Oxnard, California, and NPI 1720152002, issued on Nov 20, 2006. Check the license (California A89234, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Timothy M. Chen
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- A89234 CA
45690-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2600 E Vineyard Ave, Oxnard, CA 93036
- Phone
- (805) 436-3444
- Enumerated
- Nov 20, 2006
- Record last updated
- May 20, 2024
- Medicaid ID
- 00A892340 CA
- Medicare enrollment
- Enrolled (PECOS I20050215001115); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 2001
- Entity
- Type 1 · individual
Also registered at 2600 E Vineyard Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sara ArellanoClinical Social Worker1093245151
- Manuel BeltranInternal Medicine Physician1538705462
- Windy BromleyWomen's Health Nurse Practitioner1174083984
- Claudio Cardenas, FNPFamily Nurse Practitioner1033882295
- Carrie ChenDentist1063086171
- Lorena ChocotecoBehavior Technician1013718840
Verify Timothy M. Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A89234Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average family medicine physician in 2024
495 Medicare Part D claims for 140 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate38 claims
- Atorvastatin Calcium31 claims
- Losartan Potassium25 claims
- Metformin Hcl25 claims
- Lisinopril21 claims
- Albuterol Sulfate Hfa19 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.
Industry payments in 2024: $313.23
14 payments; by number, the most common kind was food and beverage; the largest payer was Boehringer Ingelheim Pharmaceuticals, Inc. The 55,478 providers of this specialty with any payment received $902.55 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.
Bills Medicare through one group practice
- Clinicas Del Camino Real IncOxnard, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
74 family medicine physician records list a practice address in Oxnard
They are 74 of the 3,211 NPPES records with a practice address in Oxnard, and 17,133 family medicine physician records in California.
All 74 in Oxnard → All 17,133 in California → Every provider in Oxnard →
Other family medicine physician records in California
- Omer Aba-Omer, MDSanta Monica, CA1649702093
- Michelle Ababa, MDWilmington, CA1710922513
- Anna Tzeitel Abalos, MDRoseville, CA1720200017
- Adan Abarca, MDAnaheim, CA1760553689
- Vanessa Abarca, DOVentura, CA1952040859
- Lorraine Abate, M.D.Sacramento, CA1104840008
- Robert Abatecola, MDCastro Valley, CA1669551719
- Romeo Abaya, M.D.Cottonwood, CA1598053506
- Effiem Abbah, MD, MPHSan Francisco, CA1821185133
- Khuzeman Abbasi, MDSanta Rosa, CA1841979952
Common questions
What is Timothy M. Chen, MD's NPI number?
Timothy M. Chen, MD's National Provider Identifier (NPI) is 1720152002, issued on Nov 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Timothy M. Chen, MD located?
The NPPES record lists a practice address at 2600 E Vineyard Ave, Oxnard, CA, 93036. Phone: (805) 436-3444. Providers update this record themselves, so call before visiting.
How can I verify Timothy M. Chen, MD's license?
NPPES lists California license number A89234, 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 M. Chen, MD prescribe under Medicare Part D?
In 2024, Timothy M. Chen, MD had 495 Medicare Part D claims for 140 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.