Susan Sun, M.D.
Internal Medicine Physician · Greenbrae, CA
Susan Sun, M.D. is an internal medicine physician with a practice address in Greenbrae, California, and NPI 1871685578, issued on Sep 29, 2006. Check the license (California G72947, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Susan Sun
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- G72947 CA
98399 NM
Self-reported in NPPES; status is on the state search - Practice location
- 250 Bon Air Road, Greenbrae, CA 94984
- Phone
- (415) 925-7000
- Enumerated
- Sep 29, 2006
- Record last updated
- Oct 22, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090825000767); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 1990
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Susan Sun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G72947Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
237 Medicare Part D claims for 90 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Eliquis24 claims
- Furosemide17 claims
- Clopidogrel15 claims
- Atorvastatin Calcium13 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.
The MIPS final score for 2023 (Medicare payment program): 85.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Galen Inpatient Physicians PCGreenbrae, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Susan Sun among 17,696 internal medicine physician records in California
Susan Sun, 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 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
- Graduated1990 · median 2004 among the 11,065 with a school on file
- Record last updated2015 · 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).
25 internal medicine physician records list a practice address in Greenbrae
They are 25 of the 727 NPPES records with a practice address in Greenbrae, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Greenbrae → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Michael Chase, MDSausalito, CA 949651457423105
- Siegried Audfrey Chin, MDSausalito, CA 949651578295879
- Keith Desrochers, MDSausalito, CA 949651396163416
- Bradly Jacobs, MDSausalito, CA 949651184680258
- Victoria KaufmannAptos, CA 950031780664565
- Matthew Meldorf, M.D.Sausalito, CA 949651396002812
- Suzy Nassralla, MDAptos, CA 950031043309354
- Carolyn Petersen, M.D.Sausalito, CA 949651215381173
Common questions
What is Susan Sun, M.D.'s NPI number?
Susan Sun, M.D.'s National Provider Identifier (NPI) is 1871685578, issued on Sep 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Susan Sun, M.D. located?
The NPPES record lists a practice address at 250 Bon Air Road, Greenbrae, CA, 94984. Phone: (415) 925-7000. Providers update this record themselves, so call before visiting.
How can I verify Susan Sun, M.D.'s license?
NPPES lists California license number G72947, 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 Susan Sun, M.D. prescribe under Medicare Part D?
In 2024, Susan Sun, M.D. had 237 Medicare Part D claims for 90 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Susan Sun, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.5 of 100. 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.