Dena Werner, M.D.
Internal Medicine Physician · Ventura, CA
Dena Werner, M.D. is an internal medicine physician with a practice address in Ventura, California, and NPI 1669758918, issued on Nov 1, 2011. Check the license (California A127060, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Dena Werner
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A127060 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2721 E Main St, Ventura, CA 93003
- Phone
- (805) 667-2841
- Enumerated
- Nov 1, 2011
- Record last updated
- Oct 28, 2025
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2721 E Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Simon Akl, D.O.Family Medicine Physician1396121190
- Miguel Cobian, PHARM. DPharmacist1669194015
- Michelle Daucett, D.O.Family Medicine Physician1003873035
- Emma Haftevani SogomonianFamily Medicine Physician1134798267
- Henry Oster, M.D.Infectious Disease Physician1417992223
- Kayvahn Steck-Bayat, MDObstetrics & Gynecology Physician1649512864
Verify Dena Werner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A127060Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
28 Medicare Part D claims for 14 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Dena Werner among 17,696 internal medicine physician records in California
Dena Werner, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 66% of them.
- NPI issued2011 · 66% of these records are older, 32% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
68 internal medicine physician records list a practice address in Ventura
They are 68 of the 4,435 NPPES records with a practice address in Ventura, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Ventura → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Deborah Carlson, M.D.Ventura, CA 930031942231121
- James Estes, M.D.Ventura, CA 930031336176098
- Doina Galiatzatos, M.D.Ventura, CA 930031548206089
- Scott Goodfriend, M.D.Ventura, CA 930031982636965
- Arthur Inoshita, MDVentura, CA 930031932105277
- Albert Kam, M.D.Ventura, CA 930031114953593
- Karen Lockwood, MDVentura, CA 930031558330399
- James Mitchell, MDVentura, CA 930031598705485
Common questions
What is Dena Werner, M.D.'s NPI number?
Dena Werner, M.D.'s National Provider Identifier (NPI) is 1669758918, issued on Nov 1, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Dena Werner, M.D. located?
The NPPES record lists a practice address at 2721 E Main St, Ventura, CA, 93003. Phone: (805) 667-2841. Providers update this record themselves, so call before visiting.
How can I verify Dena Werner, M.D.'s license?
NPPES lists California license number A127060, 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 Dena Werner, M.D. prescribe under Medicare Part D?
In 2024, Dena Werner, M.D. had 28 Medicare Part D claims for 14 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.