Medicare Enrolled
Dr. Zhihong Zhang, MD, PHD
Medical Oncology · Seattle, WA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Low-engagement
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. Zhang 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 →
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What this data tells you about Dr. Zhang
Dr. Zhihong Zhang is a medical oncology specialist in Seattle, WA, with 11 years of NPI registration. Based on federal Medicare data, Dr. Zhang performed 50,995 Medicare services across 1,997 unique beneficiaries.
Between the years covered by Open Payments, Dr. Zhang received a total of $647 from 6 pharmaceutical and/or device companies across 8 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in medical oncology. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Zhang 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.
✓ 11 years in practice
▲ Top 9% volume in WA
$647 industry payments
Medicare Practice Summary
Medicare Utilization ↗50,995
Medicare services
Top 9% in WA for medical oncology
1,997
Unique beneficiaries
$21
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~4,636 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) | 11,000 | $43 | $113 |
| Iron infusion (Feraheme) An injection of ferumoxytol used to treat iron deficiency anemia in patients not on dialysis. |
7,650 | $0 | $4 |
| Daratumumab injection (Darzalex) An injection containing daratumumab and hyaluronidase-fihj administered under the skin. |
7,560 | $38 | $98 |
| Paclitaxel chemotherapy injection | 4,800 | $0 | $1 |
| Contrast dye for imaging (iodine-based) A contrast agent containing 300-399 mg/ml of iodine used to enhance imaging studies. It is administered per milliliter to improve the visibility of internal structures. |
4,150 | $0 | $1 |
| Anti-nausea injection (fosaprepitant) An injection of fosaprepitant, a medication used to prevent nausea and vomiting. |
4,050 | $0 | $2 |
| Lanreotide injection, 1 mg A 1 mg injection of lanreotide medication administered into the body. |
2,760 | $39 | $145 |
| Denosumab injection (Prolia/Xgeva) | 1,800 | $18 | $48 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
1,246 | $0 | $0 |
| Anti-nausea injection (Aloxi/palonosetron) | 830 | $1 | $8 |
| 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. |
594 | $7 | $18 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
578 | $8 | $15 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
523 | $10 | $22 |
| Injection, potassium chloride, per 2 meq | 320 | $0 | $0 |
| Anti-nausea injection (ondansetron/Zofran) | 304 | $0 | $0 |
| 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. |
264 | $139 | $431 |
| 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. |
222 | $95 | $309 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
199 | $104 | $430 |
| 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. |
181 | $23 | $93 |
| Cisplatin chemotherapy injection, 10 mg Administration of a 10 mg dose of cisplatin, a chemotherapy medication, via injection. |
181 | $2 | $6 |
| Magnesium sulfate injection, per 500 mg An injection of magnesium sulfate administered in 500 mg increments. |
172 | $1 | $2 |
| Prolonged office E/M service, first 15 minutes This code is used for additional time spent by a physician beyond the maximum required time of a primary office or outpatient evaluation and management service. It is billed in 15-minute increments based on total time spent on the date of the primary service. |
158 | $25 | $88 |
| 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. |
128 | $11 | $62 |
| Non-hormonal chemotherapy injection This procedure involves administering non-hormonal anti-neoplastic chemotherapy medication via injection into the skin or muscle tissue. |
116 | $58 | $241 |
| Zoledronic acid injection, 1 mg An injection of zoledronic acid administered at a dose of 1 mg. |
88 | $6 | $37 |
| 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. |
66 | $51 | $217 |
| New patient office visit, complex (60-74 min) | 66 | $162 | $568 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
65 | $13 | $30 |
| Iron level test | 65 | $6 | $14 |
| Transferrin level test A blood test that measures the amount of transferrin, a protein that binds to and transports iron in the body. |
65 | $12 | $28 |
| Leuprolide acetate (for depot suspension), 7.5 mg | 63 | $124 | $753 |
| Additional hour of intravenous infusion This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis. |
58 | $17 | $65 |
| 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. |
57 | $52 | $208 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
47 | $16 | $38 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
45 | $1 | $3 |
| 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. |
43 | $19 | $85 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
41 | $90 | $575 |
| 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. |
39 | $25 | $96 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
39 | $23 | $91 |
| Immunoglobulin level test A blood test that measures the level of gammaglobulins, which are immune system proteins. |
36 | $9 | $21 |
| 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. |
33 | $10 | $41 |
| CT scan of abdomen and pelvis with contrast A CT scan that uses dye to create detailed images of the abdomen and pelvis. This imaging test helps doctors examine internal organs and structures in these areas. |
31 | $216 | $950 |
| 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. |
31 | $95 | $283 |
| Lactate dehydrogenase (LDH) level test A blood test that measures the amount of lactate dehydrogenase, an enzyme found in many body tissues. It helps assess tissue damage or disease. |
30 | $6 | $14 |
| 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. |
25 | $2 | $9 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
24 | $7 | $15 |
| 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. |
24 | $27 | $140 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
24 | $2 | $5 |
| 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. |
22 | $64 | $218 |
| Hepatitis B surface antibody test A blood test that measures the level of antibodies against the hepatitis B surface antigen. This test is used to check for immunity to hepatitis B or to verify the effectiveness of the hepatitis B vaccine. |
21 | $11 | $24 |
| Hepatitis B surface antigen test A blood test that uses an immunoassay technique to detect the presence of the hepatitis B surface antigen. This test identifies whether the hepatitis B virus is currently present in the body. |
21 | $10 | $23 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
15 | $14 | $34 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
13 | $139 | $550 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
12 | $14 | $33 |
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.
16.2% high complexity
77.9% medium
6.0% routine
Industry Payment Transparency
Open Payments through 2024 ↗$647
Total received (2022-2024)
Avg $216/year across 3 years
Bottom 36% in WA for medical oncology
6
Companies
8
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.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$580 (89.6%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$67 (10.4%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$185
2023
$127
2022
$335
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Lilly USA, LLC
$97
Regeneron Healthcare Solutions, Inc.
$88
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2022-2024) ›
Lilly USA, LLC
$311
Daiichi Sankyo Inc.
$101
Regeneron Healthcare Solutions, Inc.
$88
Janssen Biotech, Inc.
$67
GE HealthCare
$64
E.R. Squibb & Sons, L.L.C.
$17
Top 3 companies account for 77.2% of all-time payments
Associated products mentioned in payments ›
DARZALEX · ENHERTU · LIBTAYO · OPDUALAG · VERZENIO
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 →
Most payments (90%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Medical oncologists within 10 mi
97
Per 100K population
4.3
County median income
$122,148
Nearest hospital
VIRGINIA MASON MEDICAL CENTER
1.4 mi
1.4 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. Zhang is a mixed practice specialist, with above-average Medicare volume (top 9% in WA), with low-engagement industry engagement.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Zhang experienced with pembrolizumab injection (keytruda)?
Based on Medicare claims data, Dr. Zhang performed 11,000 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. Zhang receive payments from pharmaceutical companies?
Yes. Dr. Zhang received a total of $647 from 6 companies across 8 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. Zhang's costs compare to other medical oncologists in Seattle?
Dr. Zhang's average Medicare payment per service is $21. 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. Zhang) 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 →
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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.
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