Sharon Y. Chien, M.D.
Internal Medicine Physician · San Diego, CA
Sharon Y. Chien, M.D. is an internal medicine physician with a practice address in San Diego, California, and NPI 1316955420, issued on Aug 4, 2006. Check the license (California A85899, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sharon Y. Chien
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A85899 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2929 Health Center Dr, San Diego, CA 92123
- Phone
- (858) 499-2777
- Enumerated
- Aug 4, 2006
- Record last updated
- May 27, 2025
- Medicaid ID
- 00A858990 CA
- Medicare enrollment
- Enrolled (PECOS I20050728001155); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2929 Health Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gregory Alberton, M.D.Orthopaedic Hand Surgery Physician1457310179
- Sheila Mari Alignay- Rivera, PHARMDPharmacist1942433529
- Jose Antonio Almario, MDGastroenterology Physician1467815944
- Amarpal Arora, M.D.Orthopaedic Surgery Physician1851518401
- Cynthia Baffi, M.D.Pulmonary Disease Physician1417264227
- Kristy BaldwinAudiologist1487814455
Verify Sharon Y. Chien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A85899Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average internal medicine physician in 2024
468 Medicare Part D claims for 93 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Levothyroxine Sodium48 claims
- Atorvastatin Calcium25 claims
- Eliquis19 claims
- Losartan Potassium19 claims
- Amlodipine Besylate16 claims
- Pantoprazole Sodium15 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): 73.6 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 3 group practices
- Sharp Rees-Stealy Medical Group IncSan Diego, CA
- Southern California Permanente Medical GroupSan Diego, CA
- Ximed Hospitalists, Inc.La Jolla, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sharon Y. Chien among 17,696 internal medicine physician records in California
Sharon Y. Chien, 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
- Graduated2002 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 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).
961 internal medicine physician records list a practice address in San Diego
They are 961 of the 52,937 NPPES records with a practice address in San Diego, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Diego → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Paulette Cazares, M.D., MPHSan Diego, CA 921231710927470
- Sarah Coskun, M.D.San Diego, CA 921231104878545
- Asim Guha Roy, MDSan Diego, CA 921231083659528
- Elan Hekier, M.D.San Diego, CA 921231225092463
- Faiz Hussain, MDSan Diego, CA 921231962422147
- Bernard Lichtenstein, M.D.San Diego, CA 921231104878073
- Karim Mansour, M.D.San Diego, CA 921231942238878
- Lynne Milgram, M.D.San Diego, CA 921231629016316
Common questions
What is Sharon Y. Chien, M.D.'s NPI number?
Sharon Y. Chien, M.D.'s National Provider Identifier (NPI) is 1316955420, issued on Aug 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sharon Y. Chien, M.D. located?
The NPPES record lists a practice address at 2929 Health Center Dr, San Diego, CA, 92123. Phone: (858) 499-2777. Providers update this record themselves, so call before visiting.
How can I verify Sharon Y. Chien, M.D.'s license?
NPPES lists California license number A85899, 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 Sharon Y. Chien, M.D. prescribe under Medicare Part D?
In 2024, Sharon Y. Chien, M.D. had 468 Medicare Part D claims for 93 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Sharon Y. Chien, M.D.'s MIPS final score?
The 2023 MIPS final score is 73.6 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.