Medicare Enrolled
Dr. Michael Yen, M.D., PH.D.
Hematology & Oncology · Santa Cruz, CA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Yen from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
Are you Dr. Yen?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. Yen
Dr. Michael Yen is a hematology & oncology specialist in Santa Cruz, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Yen performed 46,071 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Yen received a total of $18,019 from 101 pharmaceutical and/or device companies across 928 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Yen is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 20 years of NPI registration
▲ Top 16% volume in CA
$18,019 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗46,071
Medicare services
Top 16% in CA for hematology & oncology
Not available
Unique patients (not deduplicated)
$7
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Anti-nausea injection (aprepitant) | 16,510 | $1 | $3 |
| Iron infusion (Injectafer) An intravenous injection of ferric carboxymaltose, an iron replacement medication. |
16,500 | $1 | $2 |
| Denosumab injection (Prolia/Xgeva) | 3,840 | $18 | $40 |
| Anti-nausea injection (Aloxi/palonosetron) | 2,220 | $1 | $67 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
1,182 | $0 | $5 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
738 | $106 | $210 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
682 | $8 | $25 |
| Normal saline infusion, 250 cc Administration of 250 cubic centimeters of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater fluid. |
540 | $1 | $40 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
456 | $74 | $155 |
| Additional sequential IV infusion, 1 hour or less This code represents an additional intravenous infusion administered sequentially to a primary infusion. It covers the administration time of one hour or less. |
390 | $27 | $85 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
368 | $120 | $360 |
| Normal saline infusion, 500 ml Administration of sterile normal saline solution through an intravenous line. This procedure involves the infusion of a 500 ml unit of the solution. |
336 | $1 | $40 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
334 | $14 | $66 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
324 | $12 | $45 |
| Carboplatin chemotherapy injection, 50 mg Administration of a 50 mg dose of carboplatin, a chemotherapy medication, via injection. |
309 | $2 | $48 |
| Concurrent intravenous infusion Administration of medication or fluid into a vein for therapy, prevention, or diagnosis while another infusion is being given. |
212 | $18 | $55 |
| Intravenous infusion of new drug or substance, 1 hour or less This procedure involves administering a new medication or substance directly into a vein through an existing access site. The infusion is completed within one hour or less. |
117 | $60 | $145 |
| Lidocaine HCl injection for IV infusion, 10 mg Administration of a 10 mg dose of lidocaine hydrochloride via intravenous infusion. |
114 | $0 | $20 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
112 | $26 | $65 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
111 | $1 | $10 |
| New patient office visit, complex (60-74 min) | 105 | $174 | $350 |
| Intravenous infusion, 1 hour or less Administration of medication or fluid directly into a vein for therapeutic, preventive, or diagnostic purposes. The procedure lasts one hour or less. |
101 | $56 | $140 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
100 | $8 | $15 |
| Additional hour of intravenous hydration This code represents each additional hour of intravenous fluid administration beyond the initial hour. It is used to bill for extended hydration therapy. |
96 | $12 | $30 |
| Intravenous hydration infusion, 31-60 minutes Administration of fluids into a vein to maintain hydration. This procedure involves an infusion lasting between 31 and 60 minutes. |
94 | $29 | $95 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
60 | $1 | $40 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
27 | $149 | $312 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
23 | $139 | $282 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
21 | $31 | $85 |
| Extended office visit by clinical staff, first hour An extended office or outpatient visit provided by clinical staff lasting at least one hour. |
19 | $17 | $34 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
17 | $34 | $50 |
| Flu vaccine, quadrivalent A flu shot containing four strains of the influenza virus to help prevent seasonal influenza infection. |
13 | $76 | $90 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. These counts do not measure clinical quality or years of experience.
40.7% high complexity
54.3% medium
4.9% routine
Industry Payment Transparency
Open Payments through 2024 ↗$18,019
Total received (2018-2024)
Avg $2,574/year across 7 years
Top 22% in CA for hematology & oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
101
Companies
928
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$3,080
2023
$3,178
2022
$2,821
2021
$2,198
2020
$541
2019
$3,332
2018
$2,869
Payments by company (2024)
AstraZeneca Pharmaceuticals LP
$243
PFIZER INC.
$214
Novartis Pharmaceuticals Corporation
$194
Janssen Biotech, Inc.
$186
ABBVIE INC.
$151
E.R. Squibb & Sons, L.L.C.
$121
Genentech USA, Inc.
$120
GENZYME CORPORATION
$112
Merck Sharp & Dohme LLC
$110
JAZZ PHARMACEUTICALS INC.
$109
Gilead Sciences, Inc.
$97
Exelixis Inc.
$90
Blueprint Medicines Corporation
$84
GlaxoSmithKline, LLC.
$84
Eisai Inc.
$73
Alexion Pharmaceuticals, Inc.
$64
Takeda Pharmaceuticals U.S.A., Inc.
$63
ADC Therapeutics America, Inc.
$61
Kite Pharma, Inc.
$55
Regeneron Healthcare Solutions, Inc.
$54
SOBI, INC
$53
Ipsen Biopharmaceuticals, Inc
$52
Astellas Pharma US Inc
$52
Daiichi Sankyo Inc.
$50
ACCORD HEALTHCARE, INC.
$43
SUN PHARMACEUTICAL INDUSTRIES INC.
$42
Coherus Biosciences Inc.
$39
EMD Serono, Inc.
$39
Celgene Corporation
$35
Organon Llc
$34
Agios Pharmaceuticals, Inc.
$32
Lilly USA, LLC
$31
Octapharma USA, Inc.
$31
Aveo Pharmaceuticals, Inc.
$25
SERVIER PHARMACEUTICALS LLC
$24
Bayer Healthcare Pharmaceuticals Inc.
$24
Rigel Pharmaceuticals, Inc.
$24
Myriad Genetic Laboratories, Inc.
$23
TerSera Therapeutics LLC
$23
Fennec Pharmaceuticals, Inc.
$22
Sumitomo Pharma America, Inc.
$22
Karyopharm Therapeutics Inc.
$20
PharmaEssentia USA Corporation
$20
Fresenius Kabi USA, LLC
$19
Mirati Therapeutics, Inc.
$19
Top 3 companies account for 21.1% of 2024 payments
All-time payments by company (2018-2024) ›
AstraZeneca Pharmaceuticals LP
$1,417
PFIZER INC.
$1,197
E.R. Squibb & Sons, L.L.C.
$1,053
Novartis Pharmaceuticals Corporation
$1,030
Genentech USA, Inc.
$791
Janssen Biotech, Inc.
$772
GENZYME CORPORATION
$632
Astellas Pharma US Inc
$610
Amgen Inc.
$593
Merck Sharp & Dohme Corporation
$580
Takeda Pharmaceuticals U.S.A., Inc.
$427
Merck Sharp & Dohme LLC
$418
Lilly USA, LLC
$377
Eisai Inc.
$374
Daiichi Sankyo Inc.
$369
Exelixis Inc.
$330
Bayer HealthCare Pharmaceuticals Inc.
$323
GlaxoSmithKline, LLC.
$308
Gilead Sciences, Inc.
$291
Seagen Inc.
$276
Rigel Pharmaceuticals, Inc.
$268
Regeneron Healthcare Solutions, Inc.
$251
Alexion Pharmaceuticals, Inc.
$248
Incyte Corporation
$231
Blueprint Medicines Corporation
$229
JAZZ PHARMACEUTICALS INC.
$217
TerSera Therapeutics LLC
$197
EMD Serono, Inc.
$165
ADC Therapeutics America, Inc.
$152
ABBVIE INC.
$151
ARRAY BIOPHARMA INC
$142
Pharmacyclics LLC, An AbbVie Company
$137
Deciphera Pharmaceuticals Inc.
$133
Kite Pharma, Inc.
$119
Boehringer Ingelheim Pharmaceuticals, Inc.
$114
PUMA BIOTECHNOLOGY, INC.
$112
Seattle Genetics, Inc.
$111
Taiho Oncology, Inc.
$106
Puma Biotechnology, Inc.
$105
Mirati Therapeutics, Inc.
$104
Organon LLC
$99
EISAI INC.
$95
Bayer Healthcare Pharmaceuticals Inc.
$89
AbbVie Inc.
$85
SERVIER PHARMACEUTICALS LLC
$83
AbbVie, Inc.
$80
Ipsen Biopharmaceuticals, Inc
$76
Stemline Therapeutics Inc.
$72
PharmaEssentia USA Corporation
$71
Dova Pharmaceuticals
$70
Karyopharm Therapeutics Inc.
$69
Coherus Biosciences Inc.
$69
ACCORD HEALTHCARE, INC.
$68
Celgene Corporation
$65
Acrotech Biopharma LLC
$56
Array BioPharma Inc.
$55
Sobi, Inc
$54
SOBI, INC
$53
Apellis Pharmaceuticals, Inc.
$52
Octapharma USA, Inc.
$50
Myovant Sciences Inc.
$49
AMAG Pharmaceuticals, Inc.
$48
Pharmacyclics LLC, an AbbVie Company
$48
Teva Pharmaceuticals USA, Inc.
$47
Otsuka America Pharmaceutical, Inc.
$45
Heron Therapeutics, Inc.
$45
Agios Pharmaceuticals, Inc.
$45
Epizyme, Inc.,
$44
Novo Nordisk Inc
$44
Dendreon Pharmaceuticals LLC
$43
SUN PHARMACEUTICAL INDUSTRIES INC.
$42
Novocure Inc.
$37
Organon Llc
$34
INSYS Therapeutics Inc
$33
MEDIVATION FIELD SOLUTIONS LLC
$31
Progenics Pharmaceuticals, Inc.
$30
ImmunoGen, Inc.
$30
Pharmacosmos Therapeutics Inc.
$25
Servier Pharmaceuticals LLC
$25
Aveo Pharmaceuticals, Inc.
$25
Myriad Genetic Laboratories, Inc.
$23
Fennec Pharmaceuticals, Inc.
$22
Genmab U.S., Inc.
$22
G1 Therapeutics, Inc.
$22
SECURA BIO, INC.
$22
Sumitomo Pharma America, Inc.
$22
TAIHO ONCOLOGY, INC.
$21
Aadi Bioscience, Inc.
$20
Advanced Accelerator Applications
$19
Fresenius Kabi USA, LLC
$19
Kyowa Kirin, Inc.
$19
BeiGene USA, Inc.
$18
Sirtex Medical Inc
$17
Secura Bio, Inc.
$17
Spectrum Pharmaceuticals Inc.
$17
TESARO, Inc.
$15
AVEO Pharmaceuticals, Inc.
$15
Verastem, Inc.
$15
Global Blood Therapeutics, Inc.
$13
Endo Pharmaceuticals Inc.
$13
Shire North American Group Inc
$12
Top 3 companies account for 20.4% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · ALIMTA · ALTUVIIIO · ALUNBRIG · ANDEXXA · AYVAKIT · Alecensa · Aliqopa · Aranesp · Avastin · BAVENCIO · BELEODAQ · BENDEKA · BESREMI · BLENREP · BOSULIF · BRAFTOVI · BRUKINSA · Balversa · Bavencio · Blincyto · Braftovi · CABOMETYX · CALQUENCE · CAMCEVI · CARVYKTI · CINVANTI · COPIKTRA · COSELA · CYRAMZA · Cabometyx · Copiktra · DARZALEX · DOPTELET · Doptelet · ELAHERE · ELIQUIS · ELITEK · ELZONRIS · EMPLICITI · ENHERTU · ENJAYMO · EPKINLY · ERBITUX · ERLEADA · Elahere · Empaveli · Enhertu · Epkinly · Erleada · Esperoct · FARYDAK · FASLODEX · FERAHEME · FOTIVDA · FRUZAQLA · Fabhalta · Fyarro · GAZYVA · GILOTRIF · HYQVIA · Halaven · IBRANCE · ICLUSIG · IDHIFA · IMBRUVICA · IMFINZI · INFLECTRA · INJECTAFER · INLYTA · Imbruvica · JADENU · JAKAFI · JEMPERLI · JEVTANA · KANJINTI · KEYTRUDA · KISQALI · KRAZATI · Kadcyla · Kyprolis · LIBTAYO · LONSURF · LUMAKRAS · LUTATHERA · LYNPARZA · Lenvima · Lonsurf · Lucentis · Lunsumio · MEKINIST · MONJUVI · MONOFERRIC · MVASI · MYLOTARG · NERLYNX · NEXPLANON · NINLARO · Nerlynx · Neulasta · Nexavar · Nplate · Nubeqa · OCTAGAM IMMUNE GLOBULIN (HUMAN) · OJJAARA · ONCASPAR · ONTRUZANT · OPDIVO · ORGOVYX · OXBRYTA · Odomzo · Oncology · Onivyde · Orserdu · PADCEV · PIQRAY · PLUVICTO · PRECISETUMOR · PROMACTA · PROVENGE · PYLARIFY · Pedmark · Perjeta · Phesgo · Poteligeo · QINLOCK · Quzyttir · REBLOZYL · RETEVMO · ROLVEDON · RYDAPT · Rezlidhia · SANDOSTATIN LAR · SARCLISA · SCEMBLIX · SIR-Spheres Microspheres · SOLIRIS · SOMATULINE DEPOT · SPRYCEL · SUTENT · SYNDROS · Stimufend · Stivarga · TABRECTA · TAGRISSO · TALVEY · TASIGNA · TAZVERIK · TECENTRIQ · TECVAYLI · TIBSOVO · TIVDAK · TUKYSA · TUMOR LYSIS SYNDROME - DISEASE · Tavalisse · Tecentriq · Tibsovo · Trodelvy · ULTOMIRIS · Udenyca · Ultomiris · VENCLEXTA · VERZENIO · VONJO · VOTRIENT · Venclexta · Vitrakvi · Vyloy · WILATE · XALKORI · XIAFLEX · XOSPATA · XPOVIO · XTANDI · Xofigo · Xospata · Xtandi · YONSA · Yescarta · ZEJULA · ZEPZELCA · ZOLADEX · Zoladex
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Geographic Context
Hematology & oncology specialists in nearby ZIP areas
39
County median income
$109,266
Nearest hospital to ZIP centroid (approximate)
DOMINICAN HOSPITAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Yen is a mixed practice specialist, with above-average Medicare volume (top 16% in CA), with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Yen experienced with anti-nausea injection (aprepitant)?
Based on Medicare claims data, Dr. Yen performed 16,510 anti-nausea injection (aprepitant) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Yen receive payments from pharmaceutical companies?
Yes. Dr. Yen received a total of $18,019 from 101 companies across 928 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Yen's costs compare to other hematology & oncology specialists in Santa Cruz?
Dr. Yen's average Medicare payment per service is $7. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Yen) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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