Michael Yen, M.D., PH.D.
NPI 1437269313 · Hematology & Oncology Physician · Santa Cruz, CA
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Yen, M.D., PH.D. is a Hematology & Oncology Physician provider in Santa Cruz, CA (NPI 1437269313).
Provider details
- NPI number
- 1437269313
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A82461 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,885 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 915 | $138 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 799 | $8 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 491 | $151 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, Additional Sequential Infusion, 1 Hour Or Less96367 | 430 | $32 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 372 | $98 |
| Injection of Additional New Drug Or Substance Into Vein96375 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 72 | 20 |
| Anastrozole | 50 | 16 |
| Lenalidomide | 47 | — |
| Hydroxyurea | 46 | — |
| Ondansetron Hcl | 30 | 21 |
| Prednisone | 23 | — |
| Ruxolitinib Phosphatebrand: Jakafi | 22 | — |
| Sunitinib Malate | 21 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,080 across 127 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-30
- Last updated
- 2012-05-18
Frequently asked questions
- What is Michael Yen's NPI number?
- Michael Yen's National Provider Identifier (NPI) is 1437269313, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Yen's specialty?
- Michael Yen is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Yen located?
- Michael Yen's practice location on file with NPPES is 1669 Dominican Way, Santa Cruz, CA 95065-1523.
- What is Michael Yen's phone number?
- The practice phone number listed in the NPPES registry for Michael Yen is (831) 475-2220.
- Does Michael Yen accept Medicare?
- Michael Yen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Yen's NPI active?
- Yes — Michael Yen's NPI (1437269313) is active in the NPPES registry as of the last update on 2012-05-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.