Medicare Enrolled
Dr. Johnny Chang, MD
Hematology & Oncology · Encino, 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. Chang 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. Chang
Dr. Johnny Chang is a hematology & oncology specialist in Encino, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Chang performed 109,293 Medicare services across 4,622 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chang received a total of $859,858 from 8 pharmaceutical and/or device companies across 1421 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. Chang 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 7% volume in CA
$859,858 industry payments
Medicare Practice Summary
Medicare Utilization ↗109,293
Medicare services
Top 7% in CA for hematology & oncology
4,622
Unique beneficiaries
$7
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~5,752 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. |
40,800 | $0 | $3 |
| Oxaliplatin chemotherapy injection This procedure involves the administration of oxaliplatin, a chemotherapy medication, via injection. The dosage specified is 0.5 mg. |
19,300 | $0 | $1 |
| Denosumab injection (Prolia/Xgeva) | 19,200 | $18 | $60 |
| Anti-nausea injection (fosaprepitant) An injection of fosaprepitant, a medication used to prevent nausea and vomiting. |
7,200 | $0 | $1 |
| 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. |
5,740 | $6 | $34 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
2,040 | $0 | $5 |
| 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. |
1,893 | $8 | $27 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
1,700 | $10 | $37 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
1,572 | $8 | $17 |
| 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. |
1,403 | $105 | $425 |
| Anti-nausea injection (Aloxi/palonosetron) | 1,120 | $1 | $4 |
| Injection, granisetron hydrochloride, 100 mcg | 880 | $0 | $2 |
| Fluorouracil injection, 500 mg Administration of a 500 mg dose of fluorouracil medication via injection. |
691 | $2 | $7 |
| Injection, gemcitabine hydrochloride, not otherwise specified, 200 mg | 630 | $3 | $10 |
| Injection, leucovorin calcium, per 50 mg | 628 | $3 | $12 |
| 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. |
582 | $13 | $74 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
484 | $14 | $74 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
341 | $123 | $556 |
| 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. |
323 | $153 | $595 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
309 | $13 | $48 |
| Iron level test | 307 | $6 | $23 |
| 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. |
304 | $9 | $26 |
| Carcinoembryonic antigen (CEA) level test A blood test that measures the level of carcinoembryonic antigen (CEA) protein. This test is used to monitor certain types of cancer. |
226 | $19 | $66 |
| 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. |
160 | $61 | $270 |
| Immunologic analysis for detection of tumor antigen, quantitative; ca 15-3 | 144 | $20 | $73 |
| New patient office visit, complex (60-74 min) | 143 | $176 | $726 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
116 | $14 | $51 |
| 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. |
114 | $60 | $231 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
107 | $15 | $53 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
98 | $26 | $122 |
| Automated red blood cell count An automated laboratory test that measures the number of red blood cells in a blood sample. |
97 | $4 | $14 |
| Direct bilirubin level test A blood test that measures the amount of direct bilirubin in your body. Direct bilirubin is the form of the waste product processed by the liver. |
85 | $5 | $18 |
| Prothrombin time test (blood clotting) A laboratory test that measures how long it takes for blood to clot. This procedure evaluates the body's coagulation process. |
76 | $4 | $14 |
| Concurrent intravenous infusion Administration of medication or fluid into a vein for therapy, prevention, or diagnosis while another infusion is being given. |
74 | $18 | $69 |
| 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. |
74 | $159 | $595 |
| 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. |
53 | $138 | $551 |
| 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. |
52 | $27 | $107 |
| CA 19-9 tumor antigen test A blood test that measures the level of CA 19-9, a substance that can be found in the blood of some people with cancer. This quantitative analysis detects and measures the specific tumor antigen. |
46 | $20 | $73 |
| PSA test (prostate cancer screening) | 41 | $18 | $64 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
40 | $1 | $5 |
| 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. |
29 | $68 | $244 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
27 | $35 | $177 |
| 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. |
24 | $6 | $21 |
| 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. |
20 | $149 | $626 |
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.
38.0% high complexity
53.7% medium
8.3% routine
Industry Payment Transparency
Open Payments through 2024 ↗$859,858
Total received (2018-2024)
Avg $122,837/year across 7 years
Top 1% in CA for hematology & oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
8
Companies
1,421
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
$857,668 (99.7%)
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$1,701 (0.2%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$489 (0.1%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$110,171
2023
$169,862
2022
$148,987
2021
$111,382
2020
$55,674
2019
$133,674
2018
$130,108
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Lilly USA, LLC
$58,719
AstraZeneca Pharmaceuticals LP
$51,451
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
Lilly USA, LLC
$608,831
AstraZeneca Pharmaceuticals LP
$248,645
PFIZER INC.
$1,551
Tosoh Bioscience, Inc.
$374
Athenex Pharmaceutical Division, LLC
$175
COMSORT, Inc
$150
Intuitive Surgical, Inc.
$115
TESARO, Inc.
$17
Top 3 companies account for 99.9% of all-time payments
Associated products mentioned in payments ›
ALIMTA · CALQUENCE · CYRAMZA · Da Vinci Surgical System · G8 Column · IMFINZI · KEYTRUDA · LYNPARZA · RETEVMO · SUTENT · TAGRISSO · VERZENIO · XALKORI · 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 →
The majority of payments (100%) 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. Total industry engagement is in the top 1% for hematology & oncology in CA.
Geographic Context
Hematology & oncology specialists within 10 mi
319
Per 100K population
3.2
County median income
$87,760
Nearest hospital
ENCINO HOSPITAL MEDICAL CENTER
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. Chang is a mixed practice specialist, with above-average Medicare volume (top 7% in CA), with speaking/promotional industry engagement in the top 1% of CA peers, 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. Chang experienced with iron infusion (feraheme)?
Based on Medicare claims data, Dr. Chang performed 40,800 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. Chang receive payments from pharmaceutical companies?
Yes. Dr. Chang received a total of $859,858 from 8 companies across 1,421 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. Chang's costs compare to other hematology & oncology specialists in Encino?
Dr. Chang's average Medicare payment per service is $7. 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. Chang) 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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