Joseph Cook Vielbig, MD
Family Medicine Physician · Ventura, CA
Joseph Cook Vielbig, MD is a family medicine physician with a practice address in Ventura, California, and NPI 1265052641, issued on Apr 25, 2020. Check the license (California A197925, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph Cook Vielbig
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A197925 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Hillmont Ave, Ventura, CA 93003
- Phone
- (805) 652-6228
- Enumerated
- Apr 25, 2020
- Record last updated
- Aug 5, 2025
- Fax
- (805) 652-6133
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 300 Hillmont Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joseph Cook Vielbig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A197925Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average family medicine physician in 2024
361 Medicare Part D claims for 74 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium32 claims
- Losartan Potassium24 claims
- Amlodipine Besylate18 claims
- Albuterol Sulfate Hfa17 claims
- Lisinopril15 claims
- Janumet Xr14 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.
Joseph Cook Vielbig among 17,133 family medicine physician records in California
Joseph Cook Vielbig, MD is one of 17,133 family medicine 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 2020, is newer than 88% of them.
- NPI issued2020 · 88% of these records are older, 9% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
234 family medicine physician records list a practice address in Ventura
They are 234 of the 4,435 NPPES records with a practice address in Ventura, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Ventura → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Charles Adams, M.D.Ventura, CA 930031811925225
- Veronica Butler, M.D.Ventura, CA 930031063472736
- Eric Chun, M.D.Ventura, CA 930031699702381
- Michelle Daucett, D.O.Ventura, CA 930031003873035
- Derrick Dcosta, M.D.Ventura, CA 930031487699005
- James Hermann, M.D.Ventura, CA 930031861442899
- Theodore Hole, M.D.Ventura, CA 930031104873611
- Andrew Kerr, M.D.Ventura, CA 930031487695078
Common questions
What is Joseph Cook Vielbig, MD's NPI number?
Joseph Cook Vielbig, MD's National Provider Identifier (NPI) is 1265052641, issued on Apr 25, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Cook Vielbig, MD located?
The NPPES record lists a practice address at 300 Hillmont Ave, Ventura, CA, 93003. Phone: (805) 652-6228. Providers update this record themselves, so call before visiting.
How can I verify Joseph Cook Vielbig, MD's license?
NPPES lists California license number A197925, 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 Joseph Cook Vielbig, MD prescribe under Medicare Part D?
In 2024, Joseph Cook Vielbig, MD had 361 Medicare Part D claims for 74 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.