Peien Fan, M.D.
NPI 1346504511 · Neurology Physician · Mercer Island, WA
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peien Fan, M.D. is a Neurology Physician provider in Mercer Island, WA (NPI 1346504511).
Provider details
- NPI number
- 1346504511
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- MD60752943 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 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
444 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) |
|---|---|---|
| Continuous Intraoperative Neurophysiology Monitoring, From Outside the Operating Room (remote Or Nearby), Per Patient, (attention Directed Exclusively to One Patient) Each 15 Minutes (list in Addition to Primary Procedure)G0453 | 215 | $34 |
| Placement of Skin Electrodes and Measurement of Stimulated Sites on Arms and Legs95938 | 47 | $48 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 42 | $141 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 39 | $183 |
| Needle Measurement of Electrical Activity in Arm Or Leg Muscles, 2 Extremities95861 | 34 | $86 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lamotrigine | 71 | 11 |
| Levetiracetam | 67 | 16 |
| Donepezil Hcl | 53 | 11 |
| Oxcarbazepine | 41 | — |
| Gabapentin | 28 | — |
| Levetiracetambrand: Levetiracetam Er | 24 | — |
| Lacosamide | 20 | — |
| Carbidopa/Levodopabrand: Carbidopa-Levodopa |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$100 across 4 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
- 2012-07-02
- Last updated
- 2024-08-13
- Certified
- 2024-08-13
Frequently asked questions
- What is Peien Fan's NPI number?
- Peien Fan's National Provider Identifier (NPI) is 1346504511, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peien Fan's specialty?
- Peien Fan is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Peien Fan located?
- Peien Fan's practice location on file with NPPES is 4736 91st Ave Se, Mercer Island, WA 98040-4440.
- What is Peien Fan's phone number?
- The practice phone number listed in the NPPES registry for Peien Fan is (773) 703-6770.
- Does Peien Fan accept Medicare?
- Peien Fan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peien Fan's NPI active?
- Yes — Peien Fan's NPI (1346504511) is active in the NPPES registry as of the last update on 2024-08-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.