Harry J. Cozen, M.D.
Anesthesiology Physician · Thousand Oaks, CA
Harry J. Cozen, M.D. is an anesthesiology physician with a practice address in Thousand Oaks, California, and NPI 1114998846, issued on Jan 31, 2006. Check the license (California A24410, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Harry J. Cozen
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- A24410 CA
Self-reported in NPPES; status is on the state search - Practice location
- 227 W Janss RD, Thousand Oaks, CA 91360
- Phone
- (805) 371-0455
- Enumerated
- Jan 31, 2006
- Record last updated
- Mar 15, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- 00A244100 CA
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 7,571 in California → Look up another NPI →
Also registered at 227 W Janss RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Harry J. Cozen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A24410Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average anesthesiology physician in 2024
14 Medicare Part D claims, against an average of 402 among the 4,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Harry J. Cozen among 7,571 anesthesiology physician records in California
Harry J. Cozen, M.D. is one of 7,571 anesthesiology physician records with a practice address in California. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 53% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2011 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
30 anesthesiology physician records list a practice address in Thousand Oaks
They are 30 of the 2,434 NPPES records with a practice address in Thousand Oaks, and 7,571 anesthesiology physician records in California.
All 7,571 in California → Every provider in Thousand Oaks → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Steven Bansbach, M.D.Thousand Oaks, CA 913601194734384
- Michael Goldberg, M.D.Thousand Oaks, CA 913601679591788
- Ward Jones, M.D.Thousand Oaks, CA 913601467463109
- Erna Kwong, M.D.Thousand Oaks, CA 913601033145388
- Liem Lechau, M.D.Thousand Oaks, CA 913601396756052
- James Lin, M.D.Thousand Oaks, CA 913601821009580
- Stephen Maloon, M.D.Thousand Oaks, CA 913601396765566
- Mark Merriman, M.D.Thousand Oaks, CA 913601104835487
Common questions
What is Harry J. Cozen, M.D.'s NPI number?
Harry J. Cozen, M.D.'s National Provider Identifier (NPI) is 1114998846, issued on Jan 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Harry J. Cozen, M.D. located?
The NPPES record lists a practice address at 227 W Janss RD, Thousand Oaks, CA, 91360. Phone: (805) 371-0455. Providers update this record themselves, so call before visiting.
How can I verify Harry J. Cozen, M.D.'s license?
NPPES lists California license number A24410, 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 Harry J. Cozen, M.D. prescribe under Medicare Part D?
In 2024, Harry J. Cozen, M.D. had 14 Medicare Part D claims; the average among anesthesiology physician prescribers was 402. 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.