Peter Ira Margolis, M.D.
Internal Medicine Physician · Thousand Oaks, CA
Peter Ira Margolis, M.D. is an internal medicine physician with a practice address in Thousand Oaks, California, and NPI 1306876164, issued on Jul 4, 2006. Check the license (California G40308, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Peter Ira Margolis
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G40308 CA
Self-reported in NPPES; status is on the state search - Practice location
- 333 S Moorpark RD, Thousand Oaks, CA 91361
- Phone
- (805) 399-2146
- Enumerated
- Jul 4, 2006
- Record last updated
- Aug 28, 2023
- Fax
- (805) 399-2146
- Medicare enrollment
- Enrolled (PECOS I20100820000980); accepts Medicare assignment
- Medical or professional school
- R Franklin University Of Med & Sci/Chicago Medical School, 1978
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Peter Ira Margolis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G40308Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average internal medicine physician in 2024
3,175 Medicare Part D claims for 200 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 66 claims were for opioids.
Most prescribed
- Atorvastatin Calcium244 claims
- Famotidine147 claims
- Rosuvastatin Calcium147 claims
- Levothyroxine Sodium122 claims
- Pantoprazole Sodium104 claims
- Amlodipine Besylate79 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.
Peter Ira Margolis among 17,696 internal medicine physician records in California
Peter Ira Margolis, 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1978 · median 2004 among the 11,065 with a school on file
- Record last updated2023 · 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).
62 internal medicine physician records list a practice address in Thousand Oaks
They are 62 of the 2,434 NPPES records with a practice address in Thousand Oaks, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Thousand Oaks → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mandana Azar, M.D.Thousand Oaks, CA 913611851612402
- William Coburn, M.D.Thousand Oaks, CA 913611144336983
- Christine Dahlin, M.D.Westlake Village, CA 913611922293786
- Anil Daya, M.D.Westlake Village, CA 913611770542722
- Rauz Eshraghi, M.D.Westlake Village, CA 913611619109378
- Zoya Furman, M.D.Thousand Oaks, CA 913611083635205
- Linda Gerrits, MDWestlake Village, CA 913611598875072
- Jigar Ghelani, MDThousand Oaks, CA 913611699823609
Common questions
What is Peter Ira Margolis, M.D.'s NPI number?
Peter Ira Margolis, M.D.'s National Provider Identifier (NPI) is 1306876164, issued on Jul 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Peter Ira Margolis, M.D. located?
The NPPES record lists a practice address at 333 S Moorpark RD, Thousand Oaks, CA, 91361. Phone: (805) 399-2146. Providers update this record themselves, so call before visiting.
How can I verify Peter Ira Margolis, M.D.'s license?
NPPES lists California license number G40308, 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 Peter Ira Margolis, M.D. prescribe under Medicare Part D?
In 2024, Peter Ira Margolis, M.D. had 3,175 Medicare Part D claims for 200 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.