Marjan Lyons, M.D.
Internal Medicine Physician · Thousand Oaks, CA
Marjan Lyons, M.D. is an internal medicine physician with a practice address in Thousand Oaks, California, and NPI 1548603517, issued on Apr 9, 2013. Check the license (California 141569, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marjan Lyons
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 141569 CA
Self-reported in NPPES; status is on the state search - Practice location
- 100 Moody CT Ste 200, Thousand Oaks, CA 91360
- Phone
- (805) 418-3500
- Enumerated
- Apr 9, 2013
- Record last updated
- Apr 17, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160707002502); accepts Medicare assignment
- Medical or professional school
- Wright State University Boonshoft School Of Medicine, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 100 Moody CT Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jennifer Arussi, MS, RDNRegistered Dietitian1114329281
- Lauren Beshay, MDEndocrinology, Diabetes & Metabolism Physician1073010757
- Roy Bryan, M.D.Diagnostic Radiology Physician1396021648
- Michael Dorsi, MDNeurological Surgery Physician1942355854
Verify Marjan Lyons in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 141569Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,945 Medicare Part D claims for 268 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Atorvastatin Calcium113 claims
- Amlodipine Besylate106 claims
- Levothyroxine Sodium97 claims
- Rosuvastatin Calcium71 claims
- Zolpidem Tartrate59 claims
- Synthroid58 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.
Bills Medicare through one group practice
- The Regents OF The University OF CaliforniaThousand Oaks, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marjan Lyons among 17,696 internal medicine physician records in California
Marjan Lyons, 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 2013, is newer than 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2013 · median 2004 among the 11,065 with a school on file
- Record last updated2019 · 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
- Jose-Nitram Aliling, M.D.Thousand Oaks, CA 913601912177759
- Manoj Aswani, M.D.Thousand Oaks, CA 913601801848825
- Pedram Bagheri, MDThousand Oaks, CA 913601578785275
- Russell Hines, M.D.Thousand Oaks, CA 913601548213101
- Christina Jacob, M.D.Thousand Oaks, CA 913601497758957
- Bernard Klein, M.D.Thousand Oaks, CA 913601831382738
- Jane Lindberg, MDThousand Oaks, CA 913601467548149
- Steven McCarthy, M.D.Thousand Oaks, CA 913601497765309
Common questions
What is Marjan Lyons, M.D.'s NPI number?
Marjan Lyons, M.D.'s National Provider Identifier (NPI) is 1548603517, issued on Apr 9, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Marjan Lyons, M.D. located?
The NPPES record lists a practice address at 100 Moody CT Ste 200, Thousand Oaks, CA, 91360. Phone: (805) 418-3500. Providers update this record themselves, so call before visiting.
How can I verify Marjan Lyons, M.D.'s license?
NPPES lists California license number 141569, 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 Marjan Lyons, M.D. prescribe under Medicare Part D?
In 2024, Marjan Lyons, M.D. had 1,945 Medicare Part D claims for 268 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.