Medicare Enrolled
Dr. Hanhsing Wu, MD
Hematology & Oncology · Mountain View, CA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Speaking/Promotional
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. Wu 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. Wu?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. Wu
Dr. Hanhsing Wu is a hematology & oncology specialist in Mountain View, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Wu performed 93,663 Medicare services across 2,216 unique beneficiaries.
Between the years covered by Open Payments, Dr. Wu received a total of $126 from 3 pharmaceutical and/or device companies across 7 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in hematology & oncology. The majority of payments are for speaking programs and promotional activities, reflecting participation in industry-sponsored events. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Wu 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.
✓ 19 years in practice
▲ Top 8% volume in CA
$126 industry payments
Medicare Practice Summary
Medicare Utilization ↗93,663
Medicare services
Top 8% in CA for hematology & oncology
2,216
Unique beneficiaries
$18
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~4,930 Medicare services per year of practice
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 |
|---|---|---|---|
| Pembrolizumab injection (Keytruda) | 16,000 | $43 | $87 |
| Paclitaxel chemotherapy injection | 11,865 | $0 | $1 |
| Tocilizumab injection (Actemra) | 11,720 | $5 | $14 |
| Iron infusion (Feraheme) An injection of ferumoxytol used to treat iron deficiency anemia in patients not on dialysis. |
11,220 | $0 | $2 |
| Anti-nausea injection (fosaprepitant) An injection of fosaprepitant, a medication used to prevent nausea and vomiting. |
11,100 | $0 | $3 |
| Privigen immune globulin injection, 500 mg An intravenous injection of Privigen, a non-lyophilized immune globulin product, administered in a 500 mg dose. |
8,310 | $37 | $169 |
| Abatacept infusion (Orencia) An injection of abatacept administered under the direct supervision of a physician. This code is used for Medicare when the drug is not self-administered. |
4,775 | $34 | $104 |
| Rituximab-pvvr biosimilar injection, 10 mg An injection of rituximab-pvvr, a biosimilar medication, administered in a 10 mg dose. |
2,930 | $22 | $190 |
| Denosumab injection (Prolia/Xgeva) | 2,520 | $18 | $45 |
| Infliximab infusion (Remicade) An injection of infliximab, excluding biosimilar versions, administered in a 10 mg dose. |
2,350 | $26 | $268 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
1,962 | $0 | $1 |
| Anti-nausea injection (ondansetron/Zofran) | 1,904 | $0 | $1 |
| BCG treatment for bladder cancer | 1,150 | $2 | $8 |
| Zoledronic acid injection, 1 mg An injection of zoledronic acid administered at a dose of 1 mg. |
628 | $6 | $202 |
| 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. |
568 | $69 | $356 |
| Carboplatin chemotherapy injection, 50 mg Administration of a 50 mg dose of carboplatin, a chemotherapy medication, via injection. |
544 | $2 | $17 |
| 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. |
535 | $1 | $8 |
| 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. |
469 | $164 | $489 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
462 | $145 | $716 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
322 | $16 | $110 |
| Additional hour of intravenous infusion This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis. |
298 | $22 | $106 |
| 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. |
239 | $116 | $364 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
195 | $30 | $154 |
| 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. |
167 | $31 | $156 |
| 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. |
165 | $70 | $360 |
| 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. |
162 | $14 | $107 |
| Leuprolide acetate (for depot suspension), 7.5 mg | 138 | $134 | $792 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
106 | $1 | $2 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
81 | $38 | $281 |
| Concurrent intravenous infusion Administration of medication or fluid into a vein for therapy, prevention, or diagnosis while another infusion is being given. |
72 | $21 | $98 |
| Subcutaneous or intramuscular chemotherapy injection This procedure involves administering anti-cancer hormonal medication through an injection into the tissue under the skin or into a muscle. |
71 | $37 | $164 |
| 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. |
66 | $13 | $74 |
| 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. |
65 | $80 | $247 |
| Intravenous push injection of new drug or substance A healthcare provider injects a new medication or substance directly into a vein using a push technique. |
62 | $60 | $309 |
| Normal saline infusion, 1000 cc Administration of 1000 cc of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater solution. |
62 | $2 | $15 |
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
47 | $110 | $365 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
45 | $0 | $7 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
40 | $73 | $252 |
| 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. |
39 | $161 | $554 |
| 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. |
37 | $35 | $291 |
| Irrigation of implanted venous access device This procedure involves flushing an implanted venous access device to clear blockages or maintain patency. It ensures the device remains functional for delivering medications or fluids. |
31 | $27 | $131 |
| Bladder instillation of anti-cancer drug A procedure where an anti-cancer medication is introduced directly into the bladder. This method delivers the treatment locally to the bladder tissue. |
30 | $84 | $567 |
| Venipuncture for blood collection A procedure to draw blood from a vein for medical testing or analysis. |
23 | $94 | $298 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
22 | $104 | $365 |
| Methylprednisolone injection, up to 125 mg An injection of methylprednisolone sodium succinate, a corticosteroid medication, with a dosage of up to 125 mg. |
20 | $4 | $16 |
| Hospital follow-up visit, low complexity Follow-up hospital visit for an established patient with straightforward or low-level medical decision making. The visit requires at least 25 minutes of time spent on the day of service. |
18 | $45 | $139 |
| Office visit for established patient An office visit for an existing patient that may not require the healthcare professional to be present. |
15 | $25 | $74 |
| Telephone medical discussion, 21-30 minutes A telephone conversation with a physician lasting between 21 and 30 minutes. This code covers the time spent discussing medical matters over the phone. |
13 | $113 | $141 |
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. A higher procedure volume generally indicates more experience with that procedure.
22.1% high complexity
75.3% medium
2.6% routine
Industry Payment Transparency
Open Payments through 2024 ↗$126
Total received (2018-2024)
Avg $25/year across 5 years
Bottom 13% in CA for hematology & oncology
3
Companies
7
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$94 (75.0%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$31 (25.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$31
2022
$32
2021
$13
2019
$12
2018
$37
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Eisai Inc.
$31
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
Seattle Genetics, Inc.
$49
PFIZER INC.
$45
Eisai Inc.
$31
Top 3 companies account for 100.0% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · IBRANCE · INLYTA · Leqembi
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. 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 →
The majority of payments (75%) are for speaking programs and promotional activities, which reflect participation in industry-sponsored educational or marketing events. This is common in hematology & oncology and does not inherently indicate bias, but patients may wish to be aware.
Geographic Context
Hematology & oncology specialists within 10 mi
124
Per 100K population
6.5
County median income
$159,674
Nearest hospital
EL CAMINO HEALTH
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | 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. Wu is a mixed practice specialist, with above-average Medicare volume (top 8% in CA), with speaking/promotional industry engagement, with 19 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. Wu experienced with pembrolizumab injection (keytruda)?
Based on Medicare claims data, Dr. Wu performed 16,000 pembrolizumab injection (keytruda) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Wu receive payments from pharmaceutical companies?
Yes. Dr. Wu received a total of $126 from 3 companies across 7 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. 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. Wu's costs compare to other hematology & oncology specialists in Mountain View?
Dr. Wu's average Medicare payment per service is $18. 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. Wu) 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 a long track record of practice, Medicare participation, and industry disclosure. 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?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
Explore related providers
Same specialty & city
Hematology & Oncology Specialists in Mountain View
Browse hematology & oncology specialists in Mountain View ranked by procedure volume and transparency data.
Highest volume
Top Hematology & Oncology Specialists in CA
Hematology & oncology specialists ranked by total Medicare services performed statewide.
Industry payments
Pharma Payments to Hematology & Oncology Specialists in CA
Which CA hematology & oncology specialists receive the most from drug and device companies.
By company
Seattle Genetics, Inc. Payments to Doctors
See all physicians who received payments from Seattle Genetics, Inc.
By company
PFIZER INC. Payments to Doctors
See all physicians who received payments from PFIZER INC.
By company
Eisai Inc. Payments to Doctors
See all physicians who received payments from Eisai Inc.
About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): 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.
Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology