Amy Jo Chien, M.D.
Medical Oncology Physician · San Francisco, CA
Amy Jo Chien, M.D. is a medical oncology physician with a practice address in San Francisco, California, and NPI 1922242932, issued on Apr 22, 2009. Check the license (California A95906, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Amy Jo Chien
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- A95906 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1600 Divisadero St, San Francisco, CA 94143
- Phone
- (415) 353-7070
- Enumerated
- Apr 22, 2009
- Record last updated
- Apr 22, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (415) 353-9898
- Medicare enrollment
- Enrolled (PECOS I20091007000550); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 447 in California → Look up another NPI →
Also registered at 1600 Divisadero St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David AlfonRegistered Nurse1558106336
- Christian Apfel, MD, PHDAnesthesiology Physician1578651105
- Fady BekheetPharmacist1780223131
- Fletcher Bell, MDInternal Medicine Physician1811647514
- Lauren Boreta, M.D.Radiation Oncology Physician1679990071
- Ronald Braun, M.D.Anesthesiology Physician1700865367
Verify Amy Jo Chien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A95906Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average medical oncology physician in 2024
178 Medicare Part D claims for 58 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Letrozole87 claims
- Anastrozole25 claims
- Kisqali24 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): 74.5 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).
Industry payments in 2024: $6,993.85
7 payments; by number, the most common kind was food and beverage; the largest payer was Genentech USA, Inc. The 3,343 providers of this specialty with any payment received $11,773.47 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Ucsf Medical Group Business ServicesSan Francisco, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Amy Jo Chien among 447 medical oncology physician records in California
Amy Jo Chien, M.D. is one of 447 medical oncology physician records with a practice address in California. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 62% of them.
- NPI issued2009 · 62% of these records are older, 35% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2003 · median 2004 among the 312 with a school on file
- Record last updated2009 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in California
There are 447 medical oncology physician records in California.
All 447 in California → Every provider in San Francisco → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Donald Abrams, MDSan Francisco, CA 941431679530018
- Weiyun Ai, MDSan Francisco, CA 941431649346842
- Rohit Bose, M.D., PH.D.San Francisco, CA 941431710140850
- Edward Cha, M.D.San Francisco, CA 941431134330988
- Lloyd Damon, MDSan Francisco, CA 941431548224058
- Steven Deeks, MDSan Francisco, CA 941431073604666
- Kristen Hege, MDSan Francisco, CA 941431710925987
- Gerald Hsu, MDSan Francisco, CA 941431467501080
Common questions
What is Amy Jo Chien, M.D.'s NPI number?
Amy Jo Chien, M.D.'s National Provider Identifier (NPI) is 1922242932, issued on Apr 22, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Amy Jo Chien, M.D. located?
The NPPES record lists a practice address at 1600 Divisadero St, San Francisco, CA, 94143. Phone: (415) 353-7070. Providers update this record themselves, so call before visiting.
How can I verify Amy Jo Chien, M.D.'s license?
NPPES lists California license number A95906, 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 Amy Jo Chien, M.D. prescribe under Medicare Part D?
In 2024, Amy Jo Chien, M.D. had 178 Medicare Part D claims for 58 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Amy Jo Chien, M.D.'s MIPS final score?
The 2023 MIPS final score is 74.5 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.