Physician Profile
Unclaimed ProfileAbout CHEN
Based in San Pablo, CA, William Wei Ming Chen, MD is listed in the NPI registry under internal medicine. William graduated from Js Weill Medical College, Cornell University in 1998. William is also listed as specialising in allergy & immunology.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What is Dr. Chen's specialty?
Dr. Chen is an internal medicine in San Pablo, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where can I find Dr. Chen?
Dr. Chen is listed at 2089 VALE RD #34, San Pablo, CA 94806. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Chen?
The number on file is (510) 235-9247. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Chen's NPI number?
Dr. Chen's National Provider Identifier is 1851498372. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Chen's medical education?
Dr. Chen attended Js Weill Medical College, Cornell University, graduating in 1998. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Chen been practising?
Dr. Chen has 28 years experience. Calculated from a graduation year of 1998, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Chen known for?
According to Medicare billing data, Dr. Chen provides treatments such as influenza vaccine split virus, preservative free and injection of drug or substance under skin or into muscle, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Chen confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Chen. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (510) 235-9247
- Email not available
Practice Locations
2089 VALE RD #34
San Pablo, CA 94806
Procedures Most Often Billed to Medicare
3,099 services · 1,760 patients · 13 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
170 |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
62 |
| Assessment of emotional or behavioral problems | Treatment | 96127 |
56 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
21 |
| Influenza vaccine, trivalent, 0.5 ml dosage | Treatment | 90658 |
16 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
1,449 |
| Annual alcohol misuse screening, 5 to 15 minutes | Billing code | G0442 |
325 |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
282 |
| Telephone medical discussion with physician, 11-20 minutes | Office visit | 99442 |
268 |
| Administration of influenza virus vaccine | Billing code | G0008 |
189 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internal medicines at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 28 related providers in 4 groups
Other internal medicines in San Pablo 6
Same specialty, same city.
Trained at Js Weill Medical College, Cornell University 8
Other providers in the same specialty who trained at the same institution.
Class of 1998 at Js Weill Medical College, Cornell University 6
Providers who graduated from the same medical school in the same year.
Also performs Influenza vaccine split virus, preservative free 8
Providers in CA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.