Michael Hsi-Ming Yen, M.D., PH.D.
Hematology & Oncology Physician · Santa Cruz, CA
Michael Hsi-Ming Yen, M.D., PH.D. is a hematology & oncology physician with a practice address in Santa Cruz, California, and NPI 1437269313, issued on Aug 30, 2006. Check the license (California A82461, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Hsi-Ming Yen
- Credential
- M.D., PH.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A82461 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1669 Dominican Way, Santa Cruz, CA 95065
- Phone
- (831) 475-2220
- Enumerated
- Aug 30, 2006
- Record last updated
- May 18, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (831) 475-2221
- Medicare enrollment
- Enrolled (PECOS I20081010000013); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 1669 Dominican Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Alexander, MDMedical Oncology Physician1053321760
- Alice Foley, PA-CPhysician Assistant1770928715
- Amy McMullen, M.D.Hematology & Oncology Physician1205860954
Verify Michael Hsi-Ming Yen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A82461Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
721 Medicare Part D claims for 141 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Letrozole72 claims
- Anastrozole50 claims
- Lenalidomide47 claims
- Hydroxyurea46 claims
- Ondansetron Hcl30 claims
- Prednisone23 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): 82.1 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: $3,080.41
127 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,560 providers of this specialty with any payment received $7,481.41 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 one group practice
- Central Coast Oncology And HematologySanta Cruz, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Hsi-Ming Yen among 1,583 hematology & oncology physician records in California
Michael Hsi-Ming Yen, M.D., PH.D. is one of 1,583 hematology & oncology physician records with a practice address in California. 83% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2000 · median 2003 among the 1,124 with a school on file
- Record last updated2012 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Santa Cruz → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Rohan AhluwaliaSanta Cruz, CA 950651053632356
- Julie Jaffe, M.D.Santa Cruz, CA 950651801942008
- Steven Lai, MDSanta Cruz, CA 950651295364321
- Amy McMullen, M.D.Santa Cruz, CA 950651205860954
- Janet WangSanta Cruz, CA 950651760629158
- Glenn Wong, DOSanta Cruz, CA 950651063537934
- Michael Wu, MDSanta Cruz, CA 950651700850104
- Jennifer Choate, MDSoquel, CA 950731326073354
Common questions
What is Michael Hsi-Ming Yen, M.D., PH.D.'s NPI number?
Michael Hsi-Ming Yen, M.D., PH.D.'s National Provider Identifier (NPI) is 1437269313, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Hsi-Ming Yen, M.D., PH.D. located?
The NPPES record lists a practice address at 1669 Dominican Way, Santa Cruz, CA, 95065. Phone: (831) 475-2220. Providers update this record themselves, so call before visiting.
How can I verify Michael Hsi-Ming Yen, M.D., PH.D.'s license?
NPPES lists California license number A82461, 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 Michael Hsi-Ming Yen, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Michael Hsi-Ming Yen, M.D., PH.D. had 721 Medicare Part D claims for 141 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Michael Hsi-Ming Yen, M.D., PH.D.'s MIPS final score?
The 2023 MIPS final score is 82.1 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.