Medicare Enrolled
Dr. Fen Jiang, MD
Medical Oncology · Mission Viejo, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Mixed 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. Jiang 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. Jiang
Dr. Fen Jiang is a medical oncology specialist in Mission Viejo, CA, with 18 years of NPI registration. Based on federal Medicare data, Dr. Jiang performed 1,440 Medicare services across 707 unique beneficiaries.
Between the years covered by Open Payments, Dr. Jiang received a total of $22,013 from 69 pharmaceutical and/or device companies across 316 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in medical oncology. The majority of payments are for consulting, which typically reflects recognized clinical expertise sought by manufacturers. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Jiang 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 32% volume in CA
$22,013 industry payments
Medicare Practice Summary
Medicare Utilization ↗1,440
Medicare services
Top 32% in CA for medical oncology
707
Unique beneficiaries
$64
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~80 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 |
|---|---|---|---|
| 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. |
264 | $7 | $43 |
| 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. |
263 | $144 | $485 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
239 | $8 | $13 |
| 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. |
191 | $107 | $345 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
170 | $10 | $32 |
| New patient office visit, complex (60-74 min) | 122 | $181 | $591 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
39 | $16 | $48 |
| 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. |
34 | $12 | $39 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
18 | $13 | $42 |
| Iron level test | 18 | $6 | $17 |
| Iron binding capacity test A blood test that measures the amount of iron in the blood and the blood's ability to bind and transport iron. |
18 | $9 | $20 |
| 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 | $109 | $350 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
13 | $15 | $45 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
12 | $14 | $46 |
| 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. |
12 | $145 | $514 |
| 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. |
11 | $78 | $245 |
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.
Industry Payment Transparency
Open Payments through 2024 ↗$22,013
Total received (2018-2024)
Avg $3,669/year across 6 years
Top 30% in CA for medical oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
69
Companies
316
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.
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$8,650 (39.3%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$6,568 (29.8%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$5,450 (24.8%)
Other
Charitable contributions, space rental, and other categories
$1,344 (6.1%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$4,237
2023
$2,902
2022
$8,587
2021
$502
2019
$5,706
2018
$80
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Novartis Pharmaceuticals Corporation
$1,344
Merck Sharp & Dohme LLC
$470
AstraZeneca Pharmaceuticals LP
$328
Incyte Corporation
$121
Takeda Pharmaceuticals U.S.A., Inc.
$119
Daiichi Sankyo Inc.
$107
ABBVIE INC.
$94
PFIZER INC.
$86
Janssen Biotech, Inc.
$75
Astellas Pharma US Inc
$74
Genentech USA, Inc.
$71
ARRAY BIOPHARMA INC
$70
Regeneron Healthcare Solutions, Inc.
$66
PharmaEssentia USA Corporation
$66
Lilly USA, LLC
$61
Tempus AI, Inc
$58
BeiGene USA, Inc.
$58
Stemline Therapeutics Inc.
$58
Blueprint Medicines Corporation
$56
E.R. Squibb & Sons, L.L.C.
$56
GENZYME CORPORATION
$56
PUMA BIOTECHNOLOGY, INC.
$54
Genmab U.S., Inc.
$53
GlaxoSmithKline, LLC.
$50
Karyopharm Therapeutics Inc.
$43
Eisai Inc.
$42
TAIHO ONCOLOGY, INC.
$41
Ipsen Biopharmaceuticals, Inc
$38
Rigel Pharmaceuticals, Inc.
$35
Agios Pharmaceuticals, Inc.
$33
Kite Pharma, Inc.
$32
Boehringer Ingelheim Pharmaceuticals, Inc.
$32
Exelixis Inc.
$29
TerSera Therapeutics LLC
$28
Geron Corporation
$22
ADC Therapeutics America, Inc.
$22
Gilead Sciences, Inc.
$22
Immunocore Limited
$21
Mirati Therapeutics, Inc.
$21
SOBI, INC
$20
Aveo Pharmaceuticals, Inc.
$19
Bayer Healthcare Pharmaceuticals Inc.
$19
Celgene Corporation
$18
Alexion Pharmaceuticals, Inc.
$17
SERVIER PHARMACEUTICALS LLC
$16
Chiesi USA, Inc.
$15
Top 3 companies account for 50.6% of 2024 payments
All-time payments by company (2018-2024) ›
Kite Pharma, Inc.
$5,474
Seattle Genetics, Inc.
$4,020
Celgene Corporation
$1,798
Novartis Pharmaceuticals Corporation
$1,698
Genentech USA, Inc.
$1,612
Exelixis Inc.
$1,449
Merck Sharp & Dohme LLC
$748
AstraZeneca Pharmaceuticals LP
$600
Incyte Corporation
$463
Daiichi Sankyo Inc.
$277
Takeda Pharmaceuticals U.S.A., Inc.
$211
PFIZER INC.
$171
E.R. Squibb & Sons, L.L.C.
$165
Lilly USA, LLC
$160
Janssen Biotech, Inc.
$149
Regeneron Healthcare Solutions, Inc.
$130
Astellas Pharma US Inc
$124
BeiGene USA, Inc.
$112
Eisai Inc.
$109
GENZYME CORPORATION
$102
Blueprint Medicines Corporation
$102
Seagen Inc.
$98
Stemline Therapeutics Inc.
$98
ABBVIE INC.
$94
Rigel Pharmaceuticals, Inc.
$92
PharmaEssentia USA Corporation
$88
Gilead Sciences, Inc.
$82
Clovis Oncology, Inc.
$80
Amgen Inc.
$76
Genmab U.S., Inc.
$75
Ipsen Biopharmaceuticals, Inc
$74
GlaxoSmithKline, LLC.
$71
ARRAY BIOPHARMA INC
$70
Karyopharm Therapeutics Inc.
$66
Mirati Therapeutics, Inc.
$65
Boehringer Ingelheim Pharmaceuticals, Inc.
$64
TAIHO ONCOLOGY, INC.
$64
Pharmacyclics LLC, an AbbVie Company
$63
Tempus AI, Inc
$58
TerSera Therapeutics LLC
$57
Puma Biotechnology, Inc.
$54
PUMA BIOTECHNOLOGY, INC.
$54
Agios Pharmaceuticals, Inc.
$53
Deciphera Pharmaceuticals Inc.
$53
Pharmacyclics LLC, An AbbVie Company
$49
AVEO Pharmaceuticals, Inc.
$47
ADC Therapeutics America, Inc.
$45
Bayer HealthCare Pharmaceuticals Inc.
$44
MorphoSys, US Inc.
$39
SERVIER PHARMACEUTICALS LLC
$38
SOBI, INC
$36
Dendreon Pharmaceuticals LLC
$33
EMD Serono, Inc.
$33
ImmunoGen, Inc.
$29
EISAI INC.
$27
Adaptive Biotechnologies Corporation
$25
Geron Corporation
$22
CSL Behring
$21
Immunocore Limited
$21
Kyowa Kirin, Inc.
$20
Alnylam Pharmaceuticals Inc.
$19
Aveo Pharmaceuticals, Inc.
$19
Bayer Healthcare Pharmaceuticals Inc.
$19
Sobi, Inc
$18
Janssen Pharmaceuticals, Inc
$18
Jazz Pharmaceuticals Inc.
$18
Foundation Medicine, Inc.
$17
Alexion Pharmaceuticals, Inc.
$17
Chiesi USA, Inc.
$15
Top 3 companies account for 51.3% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · ALUNBRIG · AYVAKIT · BAVENCIO · BESREMI · BOSULIF · BRAFTOVI · BRUKINSA · Blincyto · CABOMETYX · CALQUENCE · Cabometyx · Columvi · DARZALEX · DOPTELET · Doptelet · ELAHERE · ENHERTU · EPKINLY · ERLEADA · Elahere · Enhertu · Epkinly · FERRIPROX · FOTIVDA · FRUZAQLA · Fabhalta · GILOTRIF · GIVLAARI · Herceptin · IBRANCE · ICLUSIG · IMBRUVICA · IMFINZI · INJECTAFER · Idelvion · JAKAFI · JEMPERLI · JEVTANA · KEYTRUDA · KIMMTRAK · KISQALI · KRAZATI · Kyprolis · LIBTAYO · LONSURF · LUMAKRAS · LUTATHERA · LYNPARZA · Lenvima · MEKINIST · MONJUVI · Nubeqa · OJJAARA · OPDIVO · OPDUALAG · Onivyde · Orserdu · PADCEV · PEMAZYRE · PIQRAY · PLUVICTO · POLIVY · PROMACTA · PROVENGE · PYRUKYND · Padcev · Polivy · Pomalyst · Poteligeo · QINLOCK · Quzyttir · REBLOZYL · RETEVMO · RYTELO · Revlimid · Rezlidhia · Rubraca · SARCLISA · SCEMBLIX · SHINGRIX · Somatuline Depot · TAGRISSO · TASIGNA · TECENTRIQ · TECVAYLI · TIVDAK · Tavalisse · Tibsovo · Trodelvy · ULTOMIRIS · VERZENIO · VPRIV · Vanflyta · XALKORI · XARELTO · XPOVIO · XTANDI · Xospata · Yescarta · ZEPZELCA · clonoSEQ
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 (39%) are consulting fees, which typically reflect recognized clinical expertise sought by manufacturers.
Geographic Context
Medical oncologists within 10 mi
25
Per 100K population
0.8
County median income
$113,702
Nearest hospital
PROVIDENCE MISSION HOSPITAL
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. Jiang is a clinical cardiology specialist, with moderate Medicare volume, with mixed 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. Jiang experienced with complete blood count (cbc) with differential?
Based on Medicare claims data, Dr. Jiang performed 264 complete blood count (cbc) with differential 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. Jiang receive payments from pharmaceutical companies?
Yes. Dr. Jiang received a total of $22,013 from 69 companies across 316 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. Jiang's costs compare to other medical oncologists in Mission Viejo?
Dr. Jiang's average Medicare payment per service is $64. 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. Jiang) 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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