Marut K. Thongcharoen
Internal Medicine Physician · San Leandro, CA
Marut K. Thongcharoen is an internal medicine physician with a practice address in San Leandro, California, and NPI 1710132980, issued on Dec 1, 2008. Check the license (California C00141591, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marut K. Thongcharoen
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- C00141591 CA
251033 NY
Self-reported in NPPES; status is on the state search - Practice location
- 2800 Benedict Dr, San Leandro, CA 94577
- Phone
- (510) 357-8300
- Enumerated
- Dec 1, 2008
- Record last updated
- Apr 9, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (510) 620-3924
- Medicare enrollment
- Enrolled (PECOS I20190510000660); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2800 Benedict Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Wilfredo DiazPhysical Therapist1144459157
- Gurpinder Gill, RNRegistered Nurse1376119453
- Anna Theresa Goyeneche, PTAPhysical Therapy Assistant1396538781
- Bibekanand Gupta, NPAcute Care Nurse Practitioner1154207454
- Evelyn Nakagawa, M.D.Internal Medicine Physician1023077294
- Michael Niaki, M.D.Internal Medicine Physician1457512360
Verify Marut K. Thongcharoen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C00141591Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 97.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Pacific Inpatient Medical GroupSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marut K. Thongcharoen among 17,696 internal medicine physician records in California
Marut K. Thongcharoen 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 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2005 · 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 San Leandro
They are 62 of the 4,976 NPPES records with a practice address in San Leandro, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Leandro → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Abhijan Banerjee, M.D.San Leandro, CA 945771548292113
- Leo Chi, M.D.San Leandro, CA 945771467530220
- Young Choi, D.O.San Leandro, CA 945771871671628
- Christian Dang, M.D.San Leandro, CA 945771417986753
- Louis Edelson, M.D.San Leandro, CA 945771356429120
- Mei Kung, M.D.San Leandro, CA 945771407939465
- Sandeep Lal, M.D.San Leandro, CA 945771558448340
- Evelyn Nakagawa, M.D.San Leandro, CA 945771023077294
Common questions
What is Marut K. Thongcharoen's NPI number?
Marut K. Thongcharoen's National Provider Identifier (NPI) is 1710132980, issued on Dec 1, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Marut K. Thongcharoen located?
The NPPES record lists a practice address at 2800 Benedict Dr, San Leandro, CA, 94577. Phone: (510) 357-8300. Providers update this record themselves, so call before visiting.
How can I verify Marut K. Thongcharoen's license?
NPPES lists California license number C00141591, 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.
What is Marut K. Thongcharoen's MIPS final score?
The 2023 MIPS final score is 97.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.