Robert John Matyas, D.O.
Family Medicine Physician · Studio City, CA
Robert John Matyas, D.O. is a family medicine physician with a practice address in Studio City, California, and NPI 1578543831, issued on Jan 20, 2006. Check the license (California 20A11040, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert John Matyas
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A11040 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4450 Agnes Ave, Studio City, CA 91607
- Phone
- (808) 388-1345
- Enumerated
- Jan 20, 2006
- Record last updated
- Feb 20, 2025
- Medicare enrollment
- Enrolled (PECOS I20101117001491); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2004
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Robert John Matyas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A11040Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average family medicine physician in 2024
2,504 Medicare Part D claims for 959 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 68 claims were for opioids.
Most prescribed
- Atorvastatin Calcium242 claims
- Losartan Potassium107 claims
- Amlodipine Besylate105 claims
- Lisinopril84 claims
- Lisinopril-Hydrochlorothiazide82 claims
- Nitrofurantoin Mono-Macro64 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
- Southern California Permanente Medical GroupLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert John Matyas among 17,133 family medicine physician records in California
Robert John Matyas, D.O. 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
- Graduated2004 · median 2005 among the 10,652 with a school on file
- Record last updated2025 · 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).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Studio City → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Vannithamby Jegapragasan, MDNorth Hollywood, CA 916071811072978
- David ReisbordNorth Hollywood, CA 916071962688283
- Michael Koshak, MDNorth Hollywood, CA 916061689680696
- Armine ManukyanNorth Hollywood, CA 916061245705953
- Charlotte Margolin, MDNorth Hollywood, CA 916061841325065
- Liliya Munoz, FNPNorth Hollywood, CA 916061346076007
- Nesyah ShaestehNorth Hollywood, CA 916061205240017
- Shant ThomassianNorth Hollywood, CA 916061902546807
Common questions
What is Robert John Matyas, D.O.'s NPI number?
Robert John Matyas, D.O.'s National Provider Identifier (NPI) is 1578543831, issued on Jan 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert John Matyas, D.O. located?
The NPPES record lists a practice address at 4450 Agnes Ave, Studio City, CA, 91607. Phone: (808) 388-1345. Providers update this record themselves, so call before visiting.
How can I verify Robert John Matyas, D.O.'s license?
NPPES lists California license number 20A11040, 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 Robert John Matyas, D.O. prescribe under Medicare Part D?
In 2024, Robert John Matyas, D.O. had 2,504 Medicare Part D claims for 959 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.