Wenchiang Han, M.D.
NPI 1477545721 · Specialist · Marysville, CA
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wenchiang Han, M.D. is a Specialist provider in Marysville, CA (NPI 1477545721).
Provider details
- NPI number
- 1477545721
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A73066 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,560 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 773 | $134 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 145 | $95 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 144 | $173 |
| Needle Measurement of Electrical Activity in Arm Or Leg Muscles, Complete Study95886 | 134 | $103 |
| Assessment of and Care Planning for Patient With Impaired Thought Processing, Typically 60 Minutes99483 | 69 | $283 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 69 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Donepezil Hcl | 380 | 90 |
| Carbidopa/Levodopabrand: Carbidopa-Levodopa | 200 | 46 |
| Gabapentin | 194 | 43 |
| Escitalopram Oxalate | 177 | 39 |
| Memantine Hcl | 173 | 45 |
| Levetiracetam | 158 | 31 |
| Quetiapine Fumarate | 147 | 37 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,634 across 122 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-22
- Last updated
- 2008-07-21
Frequently asked questions
- What is Wenchiang Han's NPI number?
- Wenchiang Han's National Provider Identifier (NPI) is 1477545721, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wenchiang Han's specialty?
- Wenchiang Han is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Wenchiang Han located?
- Wenchiang Han's practice location on file with NPPES is 414 G St, Marysville, CA 95901-5663.
- What is Wenchiang Han's phone number?
- The practice phone number listed in the NPPES registry for Wenchiang Han is (530) 749-8801.
- Does Wenchiang Han accept Medicare?
- Wenchiang Han is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wenchiang Han's NPI active?
- Yes — Wenchiang Han's NPI (1477545721) is active in the NPPES registry as of the last update on 2008-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.