Margaret Ann Peterson, MD
Family Medicine Physician · Ventura, CA
Margaret Ann Peterson, MD is a family medicine physician with a practice address in Ventura, California, and NPI 1235171299, issued on Jun 12, 2006. Check the license (California G64562, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Margaret Ann Peterson
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G64562 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3555 Loma Vista RD, Ventura, CA 93003
- Phone
- (805) 643-2895
- Enumerated
- Jun 12, 2006
- Record last updated
- Apr 30, 2024
- Fax
- (805) 643-2828
- Medicare enrollment
- Enrolled (PECOS I20050726000263); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 3555 Loma Vista RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margaret Ann Peterson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G64562Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average family medicine physician in 2024
1,320 Medicare Part D claims for 104 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Levothyroxine Sodium116 claims
- Atorvastatin Calcium79 claims
- Amlodipine Besylate75 claims
- Metformin Hcl Er71 claims
- Rosuvastatin Calcium49 claims
- Losartan Potassium48 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: $242.46
4 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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.
Margaret Ann Peterson among 17,133 family medicine physician records in California
Margaret Ann Peterson, 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1987 · median 2005 among the 10,652 with a school on file
- Record last updated2024 · 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 Margaret Ann Peterson, MD's NPI number?
Margaret Ann Peterson, MD's National Provider Identifier (NPI) is 1235171299, issued on Jun 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Ann Peterson, MD located?
The NPPES record lists a practice address at 3555 Loma Vista RD, Ventura, CA, 93003. Phone: (805) 643-2895. Providers update this record themselves, so call before visiting.
How can I verify Margaret Ann Peterson, MD's license?
NPPES lists California license number G64562, 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 Margaret Ann Peterson, MD prescribe under Medicare Part D?
In 2024, Margaret Ann Peterson, MD had 1,320 Medicare Part D claims for 104 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.