Medicare Enrolled
Dr. Samuel Chung, M.D.
Hematology & Oncology · South Pasadena, CA
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. Chung 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. Chung
Dr. Samuel Chung is a hematology & oncology specialist in South Pasadena, CA, with 18 years of NPI registration. Based on federal Medicare data, Dr. Chung performed 69,329 Medicare services across 1,410 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chung received a total of $2,667 from 34 pharmaceutical and/or device companies across 111 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in hematology & 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. Chung 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.
✓ 18 years in practice
▲ Top 11% volume in CA
$2,667 industry payments
Medicare Practice Summary
Medicare Utilization ↗69,329
Medicare services
Top 11% in CA for hematology & oncology
1,410
Unique beneficiaries
$16
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~3,852 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) | 16,600 | $43 | $193 |
| Oxaliplatin chemotherapy injection This procedure involves the administration of oxaliplatin, a chemotherapy medication, via injection. The dosage specified is 0.5 mg. |
15,600 | $0 | $0 |
| Paclitaxel chemotherapy injection | 12,756 | $0 | $0 |
| Anti-nausea injection (aprepitant) | 12,350 | $1 | $6 |
| Denosumab injection (Prolia/Xgeva) | 2,820 | $18 | $83 |
| Anti-nausea injection (ondansetron/Zofran) | 1,584 | $0 | $0 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
1,158 | $0 | $0 |
| Injection, leucovorin calcium, per 50 mg | 881 | $3 | $15 |
| 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. |
821 | $102 | $481 |
| Fluorouracil injection, 500 mg Administration of a 500 mg dose of fluorouracil medication via injection. |
639 | $2 | $8 |
| Pegfilgrastim injection, 0.5 mg An injection of pegfilgrastim, a medication that stimulates the production of white blood cells. This specific code applies to the brand-name drug and excludes biosimilar versions. |
552 | $81 | $364 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
447 | $14 | $93 |
| Carboplatin chemotherapy injection, 50 mg Administration of a 50 mg dose of carboplatin, a chemotherapy medication, via injection. |
438 | $2 | $9 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
323 | $120 | $606 |
| 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. |
239 | $67 | $341 |
| 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. |
205 | $100 | $431 |
| 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. |
164 | $12 | $81 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
155 | $26 | $134 |
| 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. |
137 | $66 | $288 |
| 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. |
122 | $11 | $69 |
| 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. |
121 | $59 | $295 |
| Blood sample collection from implanted device This procedure involves drawing a blood sample directly from a medical device that has been surgically placed in the body. |
120 | $25 | $109 |
| Zoledronic acid injection, 1 mg An injection of zoledronic acid administered at a dose of 1 mg. |
115 | $6 | $31 |
| 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. |
106 | $145 | $631 |
| Leuprolide acetate (for depot suspension), 7.5 mg | 102 | $129 | $587 |
| 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. |
101 | $30 | $220 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
99 | $1 | $4 |
| 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. |
92 | $57 | $269 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
74 | $1 | $24 |
| IV chemotherapy initiation with community continuation Initiation of an intravenous chemotherapy infusion in a clinic using clinic supplies, with continuation of the infusion in a community setting such as home or assisted living. |
61 | $156 | $448 |
| Concurrent intravenous infusion Administration of medication or fluid into a vein for therapy, prevention, or diagnosis while another infusion is being given. |
57 | $18 | $84 |
| 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. |
51 | $31 | $134 |
| Additional hour of intravenous infusion This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis. |
49 | $18 | $88 |
| 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. |
47 | $26 | $147 |
| 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. |
43 | $51 | $247 |
| New patient office visit, complex (60-74 min) | 43 | $179 | $821 |
| 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. |
21 | $153 | $672 |
| 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. |
20 | $129 | $623 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
16 | $43 | $216 |
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.
1.1% high complexity
95.9% medium
2.9% routine
Industry Payment Transparency
Open Payments through 2024 ↗$2,667
Total received (2018-2024)
Avg $381/year across 7 years
Bottom 48% in CA for hematology & oncology
34
Companies
111
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
$2,282 (85.6%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$385 (14.4%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$117
2023
$130
2022
$459
2021
$290
2020
$375
2019
$1,032
2018
$262
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
AstraZeneca Pharmaceuticals LP
$74
Hologic Sales and Service, LLC
$24
PFIZER INC.
$19
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
Amgen Inc.
$551
AstraZeneca Pharmaceuticals LP
$453
Novocure GmbH
$250
PFIZER INC.
$228
Janssen Biotech, Inc.
$122
E.R. Squibb & Sons, L.L.C.
$100
Genentech USA, Inc.
$81
Celgene Corporation
$81
Astellas Pharma US Inc
$71
Novartis Pharmaceuticals Corporation
$67
Exelixis Inc.
$58
Foundation Medicine, Inc.
$41
Seattle Genetics, Inc.
$37
Merck Sharp & Dohme Corporation
$37
Radius Health, Inc.
$35
GENZYME CORPORATION
$34
Regeneron Healthcare Solutions, Inc.
$33
Takeda Pharmaceuticals U.S.A., Inc.
$33
Pharmacyclics LLC, An AbbVie Company
$30
TESARO, Inc.
$30
Alnylam Pharmaceuticals Inc.
$30
Incyte Corporation
$25
Myovant Sciences Inc.
$25
Ipsen Biopharmaceuticals, Inc
$24
Hologic Sales and Service, LLC
$24
Teva Pharmaceuticals USA, Inc.
$23
Daiichi Sankyo Inc.
$23
MorphoSys, US Inc.
$22
Mirati Therapeutics, Inc.
$21
MEDIVATION FIELD SOLUTIONS LLC
$21
Puma Biotechnology, Inc.
$18
Lilly USA, LLC
$18
Gilead Sciences, Inc.
$12
Intuitive Surgical, Inc.
$10
Top 3 companies account for 47.0% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · ALIMTA · APTIMA · Aranesp · BENDEKA · CABLIVI · Cabometyx · DARZALEX · Da Vinci Surgical System · EMPLICITI · ENHERTU · ERLEADA · EVENITY · Enhertu · Erleada · FOUNDATIONONE · GIVLAARI · ICLUSIG · IMFINZI · INLYTA · INREBIC · Imbruvica · KEYTRUDA · KRAZATI · LIBTAYO · LORBRENA · LUMAKRAS · LYNPARZA · MEKINIST · MONJUVI · MVASI · Nerlynx · Neulasta · Nplate · ONUREG · OPDIVO · ORGOVYX · PIQRAY · Prolia · Revlimid · SOMATULINE DEPOT · TAGRISSO · TECENTRIQ · Tymlos · XTANDI · ZEJULA
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 (86%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Hematology & oncology specialists within 10 mi
402
Per 100K population
4.1
County median income
$87,760
Nearest hospital
ALHAMBRA HOSPITAL MEDICAL CENTER
2.1 mi
2.1 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. Chung is a mixed practice specialist, with above-average Medicare volume (top 11% in CA), with low-engagement industry engagement, with 18 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. Chung experienced with pembrolizumab injection (keytruda)?
Based on Medicare claims data, Dr. Chung performed 16,600 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. Chung receive payments from pharmaceutical companies?
Yes. Dr. Chung received a total of $2,667 from 34 companies across 111 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. Chung's costs compare to other hematology & oncology specialists in South Pasadena?
Dr. Chung's average Medicare payment per service is $16. 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. Chung) 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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