Charles Wang, MD
NPI 1134389810 · Gastroenterology Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Wang, MD is a Gastroenterology Physician provider in Oakland, CA (NPI 1134389810).
Provider details
- NPI number
- 1134389810
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 254 | 247 |
| Pantoprazole Sodium | 115 | 39 |
| Omeprazole | 65 | 31 |
| Mesalamine | 52 | 15 |
| Cholestyraminebrand: Cholestyramine Light | 36 | 12 |
| Cholestyramine (with Sugar)brand: Cholestyramine | 27 | — |
| Peg3350/Sod Sulf,bicarb,cl/Kcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-06-16
- Last updated
- 2024-08-06
- Certified
- 2024-08-06
Frequently asked questions
- What is Charles Wang's NPI number?
- Charles Wang's National Provider Identifier (NPI) is 1134389810, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Wang's specialty?
- Charles Wang is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Wang located?
- Charles Wang's practice location on file with NPPES is 1800 Harrison St, 7th Fl, Oakland, CA 94612-3429.
- What is Charles Wang's phone number?
- The practice phone number listed in the NPPES registry for Charles Wang is (916) 784-4000.
- Does Charles Wang accept Medicare?
- Charles Wang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Wang's NPI active?
- Yes — Charles Wang's NPI (1134389810) is active in the NPPES registry as of the last update on 2024-08-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.