Hung-Wen Sun, PA-C, MMS
NPI 1326361627 · Physician Assistant · Stanford, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hung-Wen Sun, PA-C, MMS is a Physician Assistant provider in Stanford, CA (NPI 1326361627).
Provider details
- NPI number
- 1326361627
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C, MMS
- Sex
- Male
- Sole proprietor
- No
- License
- PA20835 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
81 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 42 | $110 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 20 | $64 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 19 | $159 |
Typical Medicare-allowed amounts for these services range $64–$159 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (2)
- 2105 Forest AveSan Jose, CA 95128-1425Phone: (408) 687-7905
- Po Box 5265San Jose, CA 95150-5265Phone: (408) 687-7905
Registry dates
- Enumerated
- 2010-03-01
- Last updated
- 2024-12-10
- Certified
- 2024-12-10
Frequently asked questions
- What is Hung-Wen Sun's NPI number?
- Hung-Wen Sun's National Provider Identifier (NPI) is 1326361627, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hung-Wen Sun's specialty?
- Hung-Wen Sun is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Hung-Wen Sun located?
- Hung-Wen Sun's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Hung-Wen Sun's phone number?
- The practice phone number listed in the NPPES registry for Hung-Wen Sun is (650) 723-4000.
- Does Hung-Wen Sun accept Medicare?
- Hung-Wen Sun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hung-Wen Sun's NPI active?
- Yes — Hung-Wen Sun's NPI (1326361627) is active in the NPPES registry as of the last update on 2024-12-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.