Medicare Enrolled
Dr. Wenchiang Han, M.D.
Optician · Marysville, 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. Han 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. Han
Dr. Wenchiang Han is an optician specialist in Marysville, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Han performed 11,969 Medicare services across 1,254 unique beneficiaries.
Between the years covered by Open Payments, Dr. Han received a total of $12,483 from 55 pharmaceutical and/or device companies across 732 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. Han 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.
✓ 20 years in practice
▲ Top 7% volume in CA
$12,483 industry payments
Medicare Practice Summary
Medicare Utilization ↗11,969
Medicare services
Top 7% in CA for optician
1,254
Unique beneficiaries
$19
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~598 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 |
|---|---|---|---|
| Botox injection, per unit An injection of onabotulinumtoxinA, a medication used to temporarily relax muscles or reduce gland activity. The dose is measured in units, with this code representing a single unit administered. |
10,270 | $5 | $8 |
| 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. |
777 | $94 | $200 |
| 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. |
215 | $66 | $135 |
| 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. |
182 | $123 | $250 |
| Electromyography of arm or leg muscles A test that measures the electrical activity in the muscles of the arm or leg using a needle electrode. It helps evaluate the health of muscles and the nerve cells that control them. |
161 | $83 | $198 |
| Assessment of and care planning for patient with impaired thought processing, typically 60 minutes | 51 | $207 | $400 |
| Limited needle EMG of arm or leg muscles A test that measures the electrical activity in specific muscles of the arm or leg using a needle electrode. This limited study evaluates muscle function in a targeted area. |
50 | $53 | $145 |
| Nerve conduction studies, 5-6 tests A series of 5 to 6 tests that measure how well nerves send electrical signals. The procedure evaluates nerve function and helps identify damage or dysfunction. |
45 | $106 | $300 |
| Bilateral facial and neck nerve muscle paralysis injection Injection of a chemical agent to paralyze muscles in the face and neck on both sides. |
43 | $124 | $300 |
| Nerve conduction studies, 11-12 A diagnostic test that measures how well nerves send electrical signals. It involves performing 11 to 12 separate nerve conduction studies. |
40 | $183 | $600 |
| New patient office visit, complex (60-74 min) | 40 | $157 | $300 |
| 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. |
38 | $137 | $250 |
| EEG, extended monitoring A test that records electrical activity in the brain while the patient is both awake and asleep. |
25 | $371 | $550 |
| Nerve conduction studies, 7-8 tests A series of 7 to 8 nerve conduction tests to evaluate how well nerves are sending signals to muscles. |
18 | $140 | $400 |
| Nerve conduction study, 9-10 studies A diagnostic test that measures how well nerves send electrical signals. It involves performing 9 to 10 separate nerve conduction studies to evaluate nerve function. |
14 | $102 | $500 |
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 ↗$12,483
Total received (2018-2024)
Avg $1,783/year across 7 years
Top 12% in CA for optician
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
55
Companies
732
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
$12,271 (98.3%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$212 (1.7%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$2,634
2023
$2,398
2022
$1,239
2021
$1,891
2020
$1,385
2019
$2,149
2018
$788
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
ABBVIE INC.
$671
Neurocrine Biosciences, Inc.
$306
MDD US Operations, LLC
$162
Alexion Pharmaceuticals, Inc.
$143
PFIZER INC.
$132
Eisai Inc.
$114
TG Therapeutics, Inc.
$108
Lilly USA, LLC
$106
UCB, Inc.
$92
Lundbeck LLC
$90
ARGENX US, INC.
$89
SK Life Science, Inc.
$84
Biogen, Inc.
$62
ACADIA Pharmaceuticals Inc
$60
Otsuka America Pharmaceutical, Inc.
$56
CSL Behring
$49
Sumitomo Pharma America, Inc.
$43
Genentech USA, Inc.
$43
Kyowa Kirin, Inc.
$38
BANNER LIFE SCIENCES, LLC
$27
JAZZ PHARMACEUTICALS INC.
$27
Merz Pharmaceuticals, LLC
$25
Neurelis, Inc.
$25
Vanda Pharmaceuticals Inc.
$25
Celgene Corporation
$21
GENZYME CORPORATION
$18
Amneal Pharmaceuticals LLC
$17
Top 3 companies account for 43.2% of 2024 payments
All-time payments by company (2018-2024) ›
ABBVIE INC.
$1,955
Biogen, Inc.
$797
GENZYME CORPORATION
$650
AbbVie Inc.
$628
UCB, Inc.
$524
EMD Serono, Inc.
$508
Allergan, Inc.
$416
Neurocrine Biosciences, Inc.
$389
Teva Pharmaceuticals USA, Inc.
$371
Alexion Pharmaceuticals, Inc.
$314
SK Life Science, Inc.
$311
Lilly USA, LLC
$306
MDD US Operations, LLC
$304
PFIZER INC.
$303
Amgen Inc.
$299
ACADIA Pharmaceuticals Inc
$287
Amneal Pharmaceuticals LLC
$278
Novartis Pharmaceuticals Corporation
$259
Janssen Pharmaceuticals, Inc
$250
Eisai Inc.
$232
Lundbeck LLC
$222
ARGENX US, INC.
$208
Avanir Pharmaceuticals, Inc.
$207
Acorda Therapeutics, Inc
$195
Genentech USA, Inc.
$181
Kyowa Kirin, Inc.
$180
Boston Scientific Corporation
$172
Biohaven Pharmaceuticals, Inc.
$147
Abbott Laboratories
$126
Sumitomo Pharma America, Inc.
$125
Neurelis, Inc.
$124
TG Therapeutics, Inc.
$108
Adamas Pharmaceuticals, Inc.
$100
Supernus Pharmaceuticals, Inc.
$99
Allergan Inc.
$95
Otsuka America Pharmaceutical, Inc.
$94
Celgene Corporation
$88
US WorldMeds, LLC
$70
Impax Laboratories, Inc.
$70
EISAI INC.
$64
JAZZ PHARMACEUTICALS INC.
$51
CSL Behring
$49
Biohaven Pharmaceutical Holding Company Ltd.
$40
E.R. Squibb & Sons, L.L.C.
$31
NOVARTIS PHARMACEUTICALS CORPORATION
$28
Assertio Therapeutics, Inc.
$28
BANNER LIFE SCIENCES, LLC
$27
Merz Pharmaceuticals, LLC
$25
Banner Life Sciences, LLC
$25
Vanda Pharmaceuticals Inc.
$25
Scilex Pharmaceuticals Inc.
$24
Mallinckrodt Enterprises LLC
$20
Mitsubishi Tanabe Pharma America, Inc.
$19
Xeris Pharmaceuticals, Inc.
$18
Averitas Pharma Inc.
$16
Top 3 companies account for 27.3% of all-time payments
Associated products mentioned in payments ›
ACTHAR · ADUHELM · AIMOVIG · AJOVY · AMPYRA · AMYVID · APOKYN · APTIOM · AUBAGIO · AUSTEDO · AVONEX · Aimovig · Austedo XR · BAFIERTAM · BOTOX · BOTOX COSMETIC · BOTOX THERAPEUTIC · BRIUMVI · Briviact · Cambia · DUOPA · EMGALITY · EPIDIOLEX · Fycompa · GENERAL DBS · GENERAL - DBS · GILENYA · GOCOVRI · Gocovri · Hizentra · INBRIJA · INGREZZA · Infinity DBS Pulse Generators · KESIMPTA · KEVEYIS · KISUNLA · LEMTRADA · LUMIZYME · LYRICA · Leqembi · MAYZENT · Mavenclad · NEXVIAZYME · NORTHERA · NOURIANZ · NUEDEXTA · NUPLAZID · NURTEC ODT · Nourianz · OCREVUS · ONGENTYS · OXTELLAR XR · Ocrevus · POMPE - DISEASE · PONVORY · Ponvory · QULIPTA · QUTENZA · REXULTI · REYVOW · RYTARY · Radicava · Rebif · Rystiggo · SOLIRIS · SPINRAZA · TECFIDERA · TROKENDI XR · TYSABRI · UBRELVY · ULTOMIRIS · VALTOCO · VRAYLAR · VYEPTI · VYVGART · VYVGART HYTRULO · Vimpat · XARELTO · Xadago · Xeomin · ZEPOSIA · ZTLido · Zilbrysq
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 (98%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Opticians within 10 mi
23
Per 100K population
27.7
County median income
$73,313
Nearest hospital
ADVENTIST HEALTH AND RIDEOUT
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. Han is a mixed practice specialist, with above-average Medicare volume (top 7% in CA), with low-engagement industry engagement in the top 12% of CA peers, with 20 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. Han experienced with botox injection, per unit?
Based on Medicare claims data, Dr. Han performed 10,270 botox injection, per unit 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. Han receive payments from pharmaceutical companies?
Yes. Dr. Han received a total of $12,483 from 55 companies across 732 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. Han's costs compare to other opticians in Marysville?
Dr. Han's average Medicare payment per service is $19. 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. Han) 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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