S Joseph Marianayagam, MD
Internal Medicine Physician · Lancaster, CA
S Joseph Marianayagam, MD is an internal medicine physician with a practice address in Lancaster, California, and NPI 1679673776, issued on Sep 25, 2006. Check the license (California A43915, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- S Joseph Marianayagam
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A43915 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1331 West Avenue J, Lancaster, CA 93534
- Phone
- (661) 948-0012
- Enumerated
- Sep 25, 2006
- Record last updated
- Aug 6, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (661) 940-0206
- Medicare enrollment
- Enrolled (PECOS I20101110000511); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify S Joseph Marianayagam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A43915Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,581 Medicare Part D claims for 195 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 76 claims were for opioids.
Most prescribed
- Amlodipine Besylate148 claims
- Levothyroxine Sodium137 claims
- Rosuvastatin Calcium137 claims
- Atorvastatin Calcium136 claims
- Losartan Potassium103 claims
- Omeprazole67 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.
S Joseph Marianayagam among 17,696 internal medicine physician records in California
S Joseph Marianayagam, MD 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
- Graduated1968 · median 2004 among the 11,065 with a school on file
- Record last updated2010 · 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).
55 internal medicine physician records list a practice address in Lancaster
They are 55 of the 4,273 NPPES records with a practice address in Lancaster, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Lancaster → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Harihar Agarwal, M.D.Lancaster, CA 935341215964150
- Naili Chen, D.O., MPH, MASCLancaster, CA 935341649251661
- Anthony Dulgeroff, M.D.Lancaster, CA 935341720199763
- Antony Fung, MDLancaster, CA 935341477526846
- Miranda Gaw, MDLancaster, CA 935341891705885
- Marvin Ginsburg, M.D.Lancaster, CA 935341508976580
- Shahid Hassan, M.D.Lancaster, CA 935341851401988
- Charles Lim, M.D.Lancaster, CA 935341205947231
Common questions
What is S Joseph Marianayagam, MD's NPI number?
S Joseph Marianayagam, MD's National Provider Identifier (NPI) is 1679673776, issued on Sep 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is S Joseph Marianayagam, MD located?
The NPPES record lists a practice address at 1331 West Avenue J, Lancaster, CA, 93534. Phone: (661) 948-0012. Providers update this record themselves, so call before visiting.
How can I verify S Joseph Marianayagam, MD's license?
NPPES lists California license number A43915, 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 S Joseph Marianayagam, MD prescribe under Medicare Part D?
In 2024, S Joseph Marianayagam, MD had 2,581 Medicare Part D claims for 195 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.