Medicare Enrolled
Dr. Weber Chen, M.D.
Optician · 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. Chen 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. Chen?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. Chen
Dr. Weber Chen is an optician specialist in Pasadena, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Chen performed 26,394 Medicare services across 2,300 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chen received a total of $20,685 from 88 pharmaceutical and/or device companies across 908 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in optician. 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. Chen 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 4% volume in CA
$20,685 industry payments
Medicare Practice Summary
Medicare Utilization ↗26,394
Medicare services
Top 4% in CA for optician
2,300
Unique beneficiaries
$18
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~1,389 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 |
|---|---|---|---|
| Oxaliplatin chemotherapy injection This procedure involves the administration of oxaliplatin, a chemotherapy medication, via injection. The dosage specified is 0.5 mg. |
7,621 | $0 | $0 |
| Anti-nausea injection (fosaprepitant) An injection of fosaprepitant, a medication used to prevent nausea and vomiting. |
3,486 | $0 | $0 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
3,146 | $0 | $0 |
| Denosumab injection (Prolia/Xgeva) | 2,742 | $19 | $71 |
| Anti-nausea injection (Aloxi/palonosetron) | 1,129 | $1 | $2 |
| 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. |
1,087 | $102 | $420 |
| Anti-nausea injection (ondansetron/Zofran) | 824 | $0 | $0 |
| Assessment of emotional or behavioral problems An evaluation to identify and understand emotional or behavioral issues. This process involves reviewing symptoms and behaviors to determine the nature of the concerns. |
738 | $4 | $17 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
555 | $117 | $467 |
| 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. |
533 | $25 | $101 |
| 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. |
484 | $150 | $590 |
| 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. |
446 | $12 | $48 |
| Filgrastim injection (Zarxio) for white blood cells An injection of the biosimilar medication filgrastim-sndz (Zarxio) with a dosage of 1 microgram. |
425 | $0 | $0 |
| 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. |
420 | $68 | $297 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
414 | $0 | $1 |
| 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. |
388 | $100 | $371 |
| Normal saline infusion, 500 ml Administration of sterile normal saline solution through an intravenous line. This procedure involves the infusion of a 500 ml unit of the solution. |
300 | $1 | $4 |
| 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. |
204 | $59 | $229 |
| Zoledronic acid injection, 1 mg An injection of zoledronic acid administered at a dose of 1 mg. |
197 | $3 | $11 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
188 | $25 | $98 |
| 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. |
163 | $11 | $44 |
| Carboplatin chemotherapy injection, 50 mg Administration of a 50 mg dose of carboplatin, a chemotherapy medication, via injection. |
140 | $2 | $7 |
| 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. |
138 | $55 | $227 |
| 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. |
128 | $29 | $115 |
| 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. |
119 | $143 | $571 |
| 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. |
117 | $29 | $117 |
| New patient office visit, complex (60-74 min) | 109 | $180 | $720 |
| Leuprolide acetate (for depot suspension), 7.5 mg | 63 | $48 | $183 |
| 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. |
46 | $50 | $196 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
33 | $1 | $4 |
| 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. |
11 | $124 | $548 |
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.
7.0% high complexity
79.4% medium
13.6% routine
Industry Payment Transparency
Open Payments through 2024 ↗$20,685
Total received (2018-2024)
Avg $2,955/year across 7 years
Top 9% in CA for optician
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
88
Companies
908
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
$20,685 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$5,240
2023
$5,697
2022
$3,976
2021
$1,388
2020
$1,817
2019
$2,353
2018
$213
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
AstraZeneca Pharmaceuticals LP
$597
Janssen Biotech, Inc.
$359
ARRAY BIOPHARMA INC
$279
Merck Sharp & Dohme LLC
$273
Novartis Pharmaceuticals Corporation
$257
Lilly USA, LLC
$235
Takeda Pharmaceuticals U.S.A., Inc.
$202
PFIZER INC.
$181
GlaxoSmithKline, LLC.
$174
Incyte Corporation
$168
Gilead Sciences, Inc.
$156
Genentech USA, Inc.
$155
Ipsen Biopharmaceuticals, Inc
$147
Regeneron Healthcare Solutions, Inc.
$139
E.R. Squibb & Sons, L.L.C.
$138
Boehringer Ingelheim Pharmaceuticals, Inc.
$121
Deciphera Pharmaceuticals Inc.
$111
PharmaEssentia USA Corporation
$110
ABBVIE INC.
$110
Sumitomo Pharma America, Inc.
$106
GENZYME CORPORATION
$102
Exelixis Inc.
$101
Daiichi Sankyo Inc.
$88
JAZZ PHARMACEUTICALS INC.
$85
BeiGene USA, Inc.
$74
Karyopharm Therapeutics Inc.
$67
Bayer Healthcare Pharmaceuticals Inc.
$65
TerSera Therapeutics LLC
$61
SOBI, INC
$61
ADC Therapeutics America, Inc.
$59
Celgene Corporation
$54
SUN PHARMACEUTICAL INDUSTRIES INC.
$52
Eisai Inc.
$47
Astellas Pharma US Inc
$30
EMD Serono, Inc.
$29
Verity Pharmaceuticals Inc.
$28
Novocure Inc.
$27
Tempus AI, Inc
$27
ImmunoGen, Inc.
$24
Acrotech Biopharma Inc.
$24
TAIHO ONCOLOGY, INC.
$24
Legend Biotech USA Inc.
$22
Helsinn Therapeutics (U.S.), Inc.
$21
Mirati Therapeutics, Inc.
$21
Myriad Genetic Laboratories, Inc.
$16
Kite Pharma, Inc.
$13
Top 3 companies account for 23.6% of 2024 payments
All-time payments by company (2018-2024) ›
AstraZeneca Pharmaceuticals LP
$1,373
PFIZER INC.
$1,315
Janssen Biotech, Inc.
$1,096
Genentech USA, Inc.
$855
Amgen Inc.
$792
GlaxoSmithKline, LLC.
$740
Merck Sharp & Dohme LLC
$734
Celgene Corporation
$695
Novartis Pharmaceuticals Corporation
$693
GENZYME CORPORATION
$657
Gilead Sciences, Inc.
$645
Takeda Pharmaceuticals U.S.A., Inc.
$588
Exelixis Inc.
$574
E.R. Squibb & Sons, L.L.C.
$534
ARRAY BIOPHARMA INC
$527
Lilly USA, LLC
$432
Bayer HealthCare Pharmaceuticals Inc.
$431
Astellas Pharma US Inc
$428
Boehringer Ingelheim Pharmaceuticals, Inc.
$411
Regeneron Healthcare Solutions, Inc.
$407
Incyte Corporation
$380
Karyopharm Therapeutics Inc.
$340
Ipsen Biopharmaceuticals, Inc
$332
EMD Serono, Inc.
$321
Daiichi Sankyo Inc.
$297
Merck Sharp & Dohme Corporation
$265
Bayer Healthcare Pharmaceuticals Inc.
$253
Sumitomo Pharma America, Inc.
$242
PharmaEssentia USA Corporation
$219
Seagen Inc.
$217
Kite Pharma, Inc.
$217
Eisai Inc.
$206
Deciphera Pharmaceuticals Inc.
$179
BeiGene USA, Inc.
$166
JAZZ PHARMACEUTICALS INC.
$158
EISAI INC.
$148
Janssen Scientific Affairs, LLC
$145
Alnylam Pharmaceuticals Inc.
$142
TerSera Therapeutics LLC
$136
ABBVIE INC.
$132
Blueprint Medicines Corporation
$126
Sun Pharmaceutical Industries Inc.
$103
AngioDynamics, Inc.
$103
Mirati Therapeutics, Inc.
$101
Taiho Oncology, Inc.
$99
TAIHO ONCOLOGY, INC.
$98
ImmunoGen, Inc.
$97
GE HealthCare
$92
Pharmacyclics LLC, An AbbVie Company
$89
SOBI, INC
$89
AVEO Pharmaceuticals, Inc.
$82
TESARO, Inc.
$82
MorphoSys, US Inc.
$69
ADC Therapeutics America, Inc.
$59
Foundation Medicine, Inc.
$54
SUN PHARMACEUTICAL INDUSTRIES INC.
$52
Aveo Pharmaceuticals, Inc.
$51
TOLMAR Pharmaceuticals, Inc.
$47
Clovis Oncology, Inc.
$46
Myovant Sciences Inc.
$45
Seattle Genetics, Inc.
$41
Kyowa Kirin, Inc.
$37
Stemline Therapeutics Inc.
$36
Verastem, Inc.
$33
VIVUS LLC
$31
MAYNE PHARMA INC.
$28
Verity Pharmaceuticals Inc.
$28
Novocure Inc.
$27
Tempus AI, Inc
$27
Acrotech Biopharma Inc.
$24
Jazz Pharmaceuticals Inc.
$23
Mylan Institutional Inc.
$23
AbbVie Inc.
$23
Catalyst Pharmaceuticals, Inc.
$23
Legend Biotech USA Inc.
$22
Global Blood Therapeutics, Inc.
$22
Helsinn Therapeutics (U.S.), Inc.
$21
Dova Pharmaceuticals
$21
Rigel Pharmaceuticals, Inc.
$21
Alexion Pharmaceuticals, Inc.
$21
Teva Pharmaceuticals USA, Inc.
$20
Pharmacyclics LLC, an AbbVie Company
$20
Advanced Accelerator Applications
$18
Agios Pharmaceuticals, Inc.
$18
Epizyme, Inc.,
$18
Sirtex Medical Inc
$18
Tolmar, Inc.
$16
Myriad Genetic Laboratories, Inc.
$16
Top 3 companies account for 18.3% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · AKYNZEO · ALUNBRIG · AYVAKIT · Alecensa · BAVENCIO · BELEODAQ · BENDEKA · BESREMI · BLENREP · BOSULIF · BRAFTOVI · BRUKINSA · Balversa · Bavencio · CABLIVI · CABOMETYX · CALQUENCE · CARVYKTI · CEREZYME · CYRAMZA · Cabometyx · Copiktra · DARZALEX · DOPTELET · Doptelet · ELAHERE · ELIGARD · ELIQUIS · ELITEK · EMPLICITI · ENHERTU · ENJAYMO · ERLEADA · Elahere · Enhertu · Erivedge · Erleada · FIRDAPSE · FOTIVDA · FOUNDATIONONE · Fabhalta · GAVRETO · GAZYVA · GILOTRIF · GIVLAARI · IBRANCE · ICLUSIG · IMBRUVICA · IMFINZI · INLYTA · INREBIC · Imbruvica · JAKAFI · JEMPERLI · JEVTANA · KANJINTI · KEYTRUDA · KISQALI · KRAZATI · Kyprolis · LIBTAYO · LONSURF · LORBRENA · LUMAKRAS · LUPRON DEPOT · LUTATHERA · LYNPARZA · Lenvima · Lonsurf · MEKINIST · MONJUVI · MVASI · MYRISK · NINLARO · Neulasta · Nexavar · Nplate · Nubeqa · ODOMZO · OJJAARA · OPDIVO · OPDUALAG · ORGOVYX · OXBRYTA · Ogivri · Onivyde · Optune · Orserdu · PADCEV · PANCREAZE · PEMAZYRE · PIQRAY · PROMACTA · Perjeta · Phesgo · Pomalyst · Poteligeo · QINLOCK · REBLOZYL · RYBREVANT · Revlimid · Rubraca · SARCLISA · SCEMBLIX · SIR-Spheres Microspheres · SOMATULINE DEPOT · SUTENT · Somatuline Depot · Stivarga · TABRECTA · TAGRISSO · TASIGNA · TAZVERIK · TECENTRIQ · TECVAYLI · TEVIMBRA · TIVDAK · TUKYSA · Tavalisse · Tecentriq · Trelstar · Trodelvy · Ultomiris · VENCLEXTA · VERZENIO · VPRIV · VYXEOS · Vectibix · Venclexta · Vitrakvi · XALKORI · XGEVA · XPOVIO · XT CDX · XTANDI · Xofigo · Xospata · Xtandi · YONSA · Yescarta · ZEJULA · ZEPZELCA · 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 (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 9% for optician in CA.
Geographic Context
Opticians within 10 mi
1,592
Per 100K population
16.2
County median income
$87,760
Nearest hospital
GLENDALE ADVENTIST MEDICAL CENTER
3.1 mi
3.1 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. Chen is a mixed practice specialist, with above-average Medicare volume (top 4% in CA), with low-engagement industry engagement in the top 9% 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. Chen experienced with oxaliplatin chemotherapy injection?
Based on Medicare claims data, Dr. Chen performed 7,621 oxaliplatin chemotherapy injection 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. Chen receive payments from pharmaceutical companies?
Yes. Dr. Chen received a total of $20,685 from 88 companies across 908 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. Chen's costs compare to other opticians in Pasadena?
Dr. Chen's average Medicare payment per service is $18. 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. Chen) 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 →
Explore related providers
Same specialty & city
Opticians in Pasadena
Browse opticians in Pasadena ranked by procedure volume and transparency data.
Highest volume
Top Opticians in CA
Opticians ranked by total Medicare services performed statewide.
Industry payments
Pharma Payments to Opticians in CA
Which CA opticians receive the most from drug and device companies.
By company
AstraZeneca Pharmaceuticals LP Payments to Doctors
See all physicians who received payments from AstraZeneca Pharmaceuticals LP.
By company
PFIZER INC. Payments to Doctors
See all physicians who received payments from PFIZER INC.
By company
Janssen Biotech, Inc. Payments to Doctors
See all physicians who received payments from Janssen Biotech, Inc.
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.
Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology