Chien Fang, MD
Internal Medicine Physician · San Marino, CA
Chien Fang, MD is an internal medicine physician with a practice address in San Marino, California, and NPI 1922071398, issued on Feb 8, 2006. Check the license (California G69728, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chien Fang
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G69728 CA
Self-reported in NPPES; status is on the state search - Practice location
- 375 Huntington Dr, San Marino, CA 91108
- Phone
- (626) 441-4231
- Enumerated
- Feb 8, 2006
- Record last updated
- Jun 14, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (626) 441-0282
- Medicare enrollment
- Enrolled (PECOS I20090323000301); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1989
- 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 375 Huntington Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lorna Blanco, M.D.Specialist1093787178
- Sonya Chen-Hsieh, MDFamily Medicine Physician1528017894
- Mu-Chien Chiang, D.O.Internal Medicine Physician1831322148
- Louis Countryman, M.D.Specialist1184612327
- Jeffrey Huang, D.O.Ophthalmology Physician1124274998
- Emily McDowell, PA-CPhysician Assistant1659704286
Verify Chien Fang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G69728Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% more Medicare Part D claims than the average internal medicine physician in 2024
4,488 Medicare Part D claims for 513 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 23 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium273 claims
- Levothyroxine Sodium266 claims
- Atorvastatin Calcium214 claims
- Amlodipine Besylate199 claims
- Metformin Hcl158 claims
- Losartan Potassium151 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 practice group's MIPS final score for 2023 (Medicare payment program): 80.5 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
- The Huntington Medical FoundationSan Marino, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chien Fang among 17,696 internal medicine physician records in California
Chien Fang, 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
- Graduated1989 · 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).
11 internal medicine physician records list a practice address in San Marino
They are 11 of the 184 NPPES records with a practice address in San Marino, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Marino → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Elisa Alvarado, M.D.San Marino, CA 911081891979746
- Derek Cheung, MDSan Marino, CA 911081336671981
- Mu-Chien Chiang, D.O.San Marino, CA 911081831322148
- Sonya Ehresmann, M.D.San Marino, CA 911081750533212
- Sabrina Hong, MDSan Marino, CA 911081164750394
- Ya-Gin Hanna Huang, MDSan Marino, CA 911081265012520
- Ralph Jung, MDPasadena, CA 911081831436831
- Thomas Maxwell, M.D.San Marino, CA 911081598806655
Common questions
What is Chien Fang, MD's NPI number?
Chien Fang, MD's National Provider Identifier (NPI) is 1922071398, issued on Feb 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Chien Fang, MD located?
The NPPES record lists a practice address at 375 Huntington Dr, San Marino, CA, 91108. Phone: (626) 441-4231. Providers update this record themselves, so call before visiting.
How can I verify Chien Fang, MD's license?
NPPES lists California license number G69728, 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 Chien Fang, MD prescribe under Medicare Part D?
In 2024, Chien Fang, MD had 4,488 Medicare Part D claims for 513 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Chien Fang, MD's MIPS final score?
The 2023 MIPS final score is 80.5 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.