Physician

Michael Hsi-Ming Yen, M.D., PH.D.

According to 2025 Medicare claims, Michael Yen, M.D., PH.D. (NPI: 1437269313) practices medical oncology in the Santa Cruz-Watsonville, CA market, with the plurality of this provider's patient population coming from Santa Cruz, CA. This provider's primary affiliated billing organization is CENTRAL COAST ONCOLOGY & HEMATOLOGY (NPI: 1942473491; TIN: 26-2070979) and primary practice location at 95065-0001.

Yen's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 388 traditional Medicare patients, billed 178,697 HCPCS/CPT codes, and received $3,315,162 in Medicare payments. The top billing code was 99205 (New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more). Part D data shows 721 prescription claims across 141 beneficiaries totaling $3,155,131 in drug costs, led by Lenalidomide (Lenalidomide). DME data shows 62 claims. Open Payments data shows 127 records totaling $3,080. You can download detailed data with all billing codes (2015-2024). For more recent data, please contact us.

Over the past 10 years, this provider's Medicare Part B carrier billing has moved from a lower plateau to a higher plateau, from $1,166,035 to $3,315,162. Similarly, Part D prescription costs have moved from a lower plateau to a higher plateau, from $515,570 to $3,155,131. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.

Part B Carrier Billing Trend

Medicare payment trend, with N of patients and claim lines in the table.

Year	Patients	Clm Lines	Payment
2015	316	79,050	$1,166,035
2016	284	84,226	$1,163,235
2017	285	94,617	$1,681,460
2018	379	113,407	$2,476,532
2019	359	168,821	$3,071,121
2020	345	192,428	$2,796,699
2021	344	132,746	$2,324,613
2022	339	135,017	$2,319,683
2023	364	166,596	$2,393,777
2024	388	178,697	$3,315,162

Part D Events Trend

Drug cost trend, with N of patients and prescription claims in the table.

Year	Patients	Claims	Drug Cost
2015	123	755	$515,570
2016	107	608	$998,961
2017	105	564	$1,008,689
2018	116	673	$1,295,899
2019	127	826	$2,123,219
2020	122	809	$2,608,455
2021	123	657	$2,071,545
2022	122	632	$2,549,294
2023	138	680	$3,051,312
2024	141	721	$3,155,131

DME Billing Trend

Medicare payment trend, with N of patients and DME claim records in the table.

Year	Patients	Claims	Payment
2015	27	162	$85,306
2016	25	121	$56,382
2017	N/R	71	$19,965
2018	N/R	59	$9,570
2019	N/R	62	$6,696
2020	11	125	$9,660
2021	23	102	$9,872
2022	N/R	126	$4,884
2023	N/R	112	$10,947
2024	N/R	62	$3,465

* / # = suppressed by CMS; 0 = reported zero; N/R = not reported or blank.

Top 5 Part B carrier billing codes in 2024

By total payments.

Code	Description	Patients	Clm Lines	Total Payment
99205	New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	114	114	$175
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	235	915	$104
99213	Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more	167	372	$72
G2211	Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	118	153	$13
85025	Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	162	799	$8

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Lenalidomide	Lenalidomide	47	1,316	$788,332
Jakafi	Ruxolitinib Phosphate	22	660	$381,384
Revlimid	Lenalidomide	18	504	$347,420
Sprycel	Dasatinib	18	540	$258,279
Scemblix	Asciminib Hydrochloride	12	360	$255,573

Top 5 DME services in 2024

By Total Medicare Payment Amount.

HCPCS Code	HCPCS Description	Supplier Rental Indicator	Total Supplier Beneficiaries	Total Supplier Claims	Total Medicare Payment Amount
B4152	Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit	N	N/R	12	$2,088
J8521	Capecitabine, oral, 500 mg	N	N/R	29	$982
Q0511	Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period	N	N/R	21	$395

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	127	$3,080	AstraZeneca Pharmaceuticals LP
Research Payments	Reported research-related payment or transfer-of-value amount.	0	$0	N/R
Ownership / Investment Interests	Reported value of ownership or investment interests.	0	$0	N/R

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FAQ

What Medicare data is available for Michael Hsi-Ming Yen, M.D., PH.D.?

Tedicare shows public-source Medicare data for Michael Hsi-Ming Yen, M.D., PH.D. (NPI 1437269313), including provider identity, specialty, market context, Medicare Part B activity, Part D prescribing, DME records, Open Payments where available, billing organization details, and ACO affiliation signals where available. Profile data covers 2015-2024, with current attribution based on 2025 claims where available.

Does Michael Hsi-Ming Yen, M.D., PH.D. have ACO affiliation data?

No ACO affiliation record is shown in the available Tedicare data for this profile.

What billing organization is linked to Michael Hsi-Ming Yen, M.D., PH.D.?

Michael Hsi-Ming Yen, M.D., PH.D. is linked to CENTRAL COAST ONCOLOGY & HEMATOLOGY (billing NPI 1942473491) in the available physician profile data.

Does Michael Hsi-Ming Yen, M.D., PH.D. have Open Payments data?

Michael Hsi-Ming Yen, M.D., PH.D. has 127 connected Open Payments records in the available 2024 summary data.

Can I download physician-level Medicare data from Tedicare?

Yes. Tedicare provides sample physician export data and paid custom physician data exports for research, planning, outreach, and market analysis. Exports can include physician profile fields, market and specialty context, billing organization details, ACO affiliation signals where available, and Medicare utilization data.