Medicare Enrolled
Dr. Jiyon Choi, MD
Hematology & Oncology · Antioch, 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. Choi 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. Choi?
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What this data tells you about Dr. Choi
Dr. Jiyon Choi is a hematology & oncology specialist in Antioch, CA, with 18 years of NPI registration. Based on federal Medicare data, Dr. Choi performed 32,372 Medicare services across 1,786 unique beneficiaries.
Between the years covered by Open Payments, Dr. Choi received a total of $18,318 from 74 pharmaceutical and/or device companies across 950 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. Choi 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 19% volume in CA
$18,318 industry payments
Medicare Practice Summary
Medicare Utilization ↗32,372
Medicare services
Top 19% in CA for hematology & oncology
1,786
Unique beneficiaries
$21
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~1,798 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 |
|---|---|---|---|
| Iron infusion (Feraheme) An injection of ferumoxytol used to treat iron deficiency anemia in patients not on dialysis. |
9,690 | $0 | $9 |
| Denosumab injection (Prolia/Xgeva) | 8,220 | $18 | $65 |
| 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. |
2,600 | $0 | $3 |
| Epoetin alfa injection (Retacrit) for anemia An injection of a biosimilar form of epoetin alfa used for non-end-stage renal disease purposes. The dose administered is 1000 units. |
2,580 | $6 | $28 |
| Anti-nausea injection (Aloxi/palonosetron) | 1,780 | $1 | $98 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
1,330 | $0 | $7 |
| MRI contrast dye injection (gadobutrol) | 1,325 | $0 | $2 |
| 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. |
839 | $8 | $31 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
676 | $8 | $16 |
| 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. |
397 | $30 | $144 |
| 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. |
348 | $14 | $81 |
| 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. |
324 | $115 | $364 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
266 | $139 | $655 |
| 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. |
250 | $75 | $256 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
231 | $56 | $246 |
| Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries | 141 | $288 | $1,136 |
| Nuclear medicine scan from skull base to mid-thigh with CT A nuclear medicine imaging study covering the area from the base of the skull to the middle of the thighs, performed alongside a CT scan. |
127 | $1,735 | $6,766 |
| 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. |
121 | $71 | $189 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
117 | $1 | $9 |
| Zoledronic acid injection, 1 mg An injection of zoledronic acid administered at a dose of 1 mg. |
114 | $7 | $329 |
| Concurrent intravenous infusion Administration of medication or fluid into a vein for therapy, prevention, or diagnosis while another infusion is being given. |
108 | $20 | $88 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
94 | $29 | $145 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
94 | $1 | $32 |
| 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. |
84 | $87 | $370 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
83 | $1 | $16 |
| 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. |
74 | $67 | $296 |
| 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. |
54 | $69 | $314 |
| 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. |
45 | $44 | $117 |
| 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. |
43 | $154 | $428 |
| 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. |
32 | $142 | $513 |
| 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. |
29 | $108 | $278 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
25 | $182 | $979 |
| 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. |
25 | $321 | $1,390 |
| Whole body nuclear medicine scan with CT A combined imaging procedure using nuclear medicine and CT scans to visualize the entire body. |
24 | $1,738 | $6,758 |
| 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. |
22 | $169 | $455 |
| New patient office visit, complex (60-74 min) | 18 | $189 | $599 |
| Initial hospital admission, moderate complexity Initial hospital inpatient or observation care for a new patient involving moderate-level medical decision making, with at least 55 minutes total time on the date of the encounter. |
16 | $110 | $369 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
15 | $37 | $211 |
| CT scan of chest, without contrast A computed tomography scan of the chest area that uses X-rays to create detailed images without the use of contrast dye. |
11 | $144 | $772 |
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.
32.7% high complexity
58.1% medium
9.2% routine
Industry Payment Transparency
Open Payments through 2024 ↗$18,318
Total received (2018-2024)
Avg $2,617/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.
74
Companies
950
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
$18,153 (99.1%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$165 (0.9%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$3,609
2023
$3,257
2022
$2,895
2021
$2,625
2020
$1,832
2019
$2,228
2018
$1,872
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
PFIZER INC.
$420
AstraZeneca Pharmaceuticals LP
$253
E.R. Squibb & Sons, L.L.C.
$245
Novartis Pharmaceuticals Corporation
$242
Celgene Corporation
$237
Merck Sharp & Dohme LLC
$213
Astellas Pharma US Inc
$191
GlaxoSmithKline, LLC.
$175
Takeda Pharmaceuticals U.S.A., Inc.
$149
Genentech USA, Inc.
$149
Eisai Inc.
$134
Janssen Biotech, Inc.
$125
SpringWorks Therapeutics, Inc.
$124
ARRAY BIOPHARMA INC
$98
BeiGene USA, Inc.
$92
Lilly USA, LLC
$82
GENZYME CORPORATION
$73
Incyte Corporation
$72
Aveo Pharmaceuticals, Inc.
$69
ABBVIE INC.
$64
Agios Pharmaceuticals, Inc.
$47
Exelixis Inc.
$46
Karyopharm Therapeutics Inc.
$42
PharmaEssentia USA Corporation
$39
Deciphera Pharmaceuticals Inc.
$35
Regeneron Healthcare Solutions, Inc.
$32
Kyowa Kirin, Inc.
$28
Boehringer Ingelheim Pharmaceuticals, Inc.
$26
Acrotech Biopharma Inc.
$25
Ipsen Biopharmaceuticals, Inc
$25
TerSera Therapeutics LLC
$21
EMD Serono, Inc.
$19
Gilead Sciences, Inc.
$16
Top 3 companies account for 25.4% of 2024 payments
All-time payments by company (2018-2024) ›
E.R. Squibb & Sons, L.L.C.
$1,518
Novartis Pharmaceuticals Corporation
$1,513
PFIZER INC.
$1,230
Celgene Corporation
$1,136
AstraZeneca Pharmaceuticals LP
$1,134
Astellas Pharma US Inc
$1,020
Merck Sharp & Dohme Corporation
$865
Janssen Biotech, Inc.
$700
GlaxoSmithKline, LLC.
$690
Genentech USA, Inc.
$622
Seagen Inc.
$565
Amgen Inc.
$504
Takeda Pharmaceuticals U.S.A., Inc.
$481
Eisai Inc.
$453
Merck Sharp & Dohme LLC
$445
Lilly USA, LLC
$438
GENZYME CORPORATION
$415
ARRAY BIOPHARMA INC
$356
Kite Pharma, Inc.
$337
BeiGene USA, Inc.
$320
Pharmacyclics LLC, An AbbVie Company
$304
Epizyme, Inc.,
$219
Daiichi Sankyo Inc.
$218
Boehringer Ingelheim Pharmaceuticals, Inc.
$201
Exelixis Inc.
$196
EISAI INC.
$191
Incyte Corporation
$158
TESARO, Inc.
$145
SpringWorks Therapeutics, Inc.
$124
Karyopharm Therapeutics Inc.
$117
Deciphera Pharmaceuticals Inc.
$110
PharmaEssentia USA Corporation
$105
CTI BioPharma Corp.
$103
JAZZ PHARMACEUTICALS INC.
$93
Taiho Oncology, Inc.
$78
Organon LLC
$73
Aveo Pharmaceuticals, Inc.
$69
Agios Pharmaceuticals, Inc.
$66
ABBVIE INC.
$64
Kyowa Kirin, Inc.
$61
AbbVie Inc.
$57
MorphoSys, US Inc.
$46
Bayer HealthCare Pharmaceuticals Inc.
$45
Ipsen Biopharmaceuticals, Inc
$41
SERVIER PHARMACEUTICALS LLC
$41
TerSera Therapeutics LLC
$39
AVEO Pharmaceuticals, Inc.
$36
Global Blood Therapeutics, Inc.
$35
Foundation Medicine, Inc.
$33
Acrotech Biopharma LLC
$33
Regeneron Healthcare Solutions, Inc.
$32
Octapharma USA, Inc.
$30
Seattle Genetics, Inc.
$30
Alexion Pharmaceuticals, Inc.
$29
Lexicon Pharmaceuticals, Inc.
$27
Acrotech Biopharma Inc.
$25
ImmunoGen, Inc.
$24
Apellis Pharmaceuticals, Inc.
$24
Pharmacyclics LLC, an AbbVie Company
$22
Bayer Healthcare Pharmaceuticals Inc.
$19
Acceleron Pharma, Inc.
$19
EMD Serono, Inc.
$19
SOBI, INC
$18
Dova Pharmaceuticals
$18
Array BioPharma Inc.
$18
Sun Pharmaceutical Industries Inc.
$17
Heron Therapeutics, Inc.
$17
Gilead Sciences, Inc.
$16
Secura Bio, Inc.
$14
Sirtex Medical Inc
$14
Jazz Pharmaceuticals Inc.
$13
Medtronic, Inc.
$12
Clovis Oncology, Inc.
$12
Janssen Pharmaceuticals, Inc
$9
Top 3 companies account for 23.3% of all-time payments
Associated products mentioned in payments ›
ADAKVEO · ADCETRIS · AFINITOR · ALUNBRIG · AQUAMANTYS · Abraxane · Alecensa · BELEODAQ · BESREMI · BLENREP · BOSULIF · BRAFTOVI · BRUKINSA · Balversa · Blincyto · Braftovi · CABOMETYX · CALQUENCE · COSELA · CRESEMBA · CYRAMZA · Cabometyx · DARZALEX · Doptelet · ELIQUIS · ELITEK · ELREXFIO · EMPLICITI · ENHERTU · ENJAYMO · EPKINLY · ERBITUX · ERLEADA · Elahere · Empaveli · Enhertu · Erleada · FOTIVDA · FOUNDATIONONE · Fabhalta · Farydak · GAZYVA · GILOTRIF · Halaven · IBRANCE · ICLUSIG · IMBRUVICA · IMFINZI · INJECTAFER · INLYTA · Imbruvica · JADENU · JAKAFI · JEMPERLI · JEVTANA · KANJINTI · KEYTRUDA · KISQALI · Kyprolis · LIBTAYO · LONSURF · LORBRENA · LUMAKRAS · LUTATHERA · LYNPARZA · Lenvima · Lunsumio · MEKINIST · MONJUVI · NINLARO · Nplate · Nubeqa · OCTAGAM IMMUNE GLOBULIN (HUMAN) · OGSIVEO · OJJAARA · ONTRUZANT · OPDIVO · OPDUALAG · OXBRYTA · Odomzo · Onivyde · PADCEV · PIQRAY · PLUVICTO · POTELIGEO · PROMACTA · Padcev · Perjeta · Phesgo · Pomalyst · Poteligeo · QINLOCK · REBLOZYL · RETEVMO · RYBREVANT · RYDAPT · Reblozyl · Revlimid · Rubraca · SANDOSTATIN · SARCLISA · SCEMBLIX · SIR-Spheres Microspheres · SOMATULINE DEPOT · SPRYCEL · SUSTOL · SUTENT · TABRECTA · TAGRISSO · TASIGNA · TAZVERIK · TECENTRIQ · TIBSOVO · TUKYSA · Tecentriq · Tibsovo · Turalio · Ultomiris · VENCLEXTA · VERZENIO · VOTRIENT · Venclexta · Vitrakvi · Vonjo · Vyloy · XALKORI · XGEVA · XOSPATA · XPOVIO · XTANDI · Xermelo · Xospata · Xtandi · Yescarta · ZEJULA · ZEPOSIA · ZEPZELCA · ZOLADEX · ZYTIGA · Zoladex
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 (99%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Hematology & oncology specialists within 10 mi
52
Per 100K population
4.5
County median income
$125,727
Nearest hospital
KAISER FOUNDATION HOSPITAL - ANTIOCH
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. Choi is a mixed practice specialist, with above-average Medicare volume (top 19% 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. Choi experienced with iron infusion (feraheme)?
Based on Medicare claims data, Dr. Choi performed 9,690 iron infusion (feraheme) 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. Choi receive payments from pharmaceutical companies?
Yes. Dr. Choi received a total of $18,318 from 74 companies across 950 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. Choi's costs compare to other hematology & oncology specialists in Antioch?
Dr. Choi'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. Choi) 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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