Karen Ouyang-Shwe, MD
NPI 1831275353 · Internal Medicine Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Ouyang-Shwe, MD is a Internal Medicine Physician provider in San Jose, CA (NPI 1831275353).
Provider details
- NPI number
- 1831275353
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A52848 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% 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 · 78 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 549 | 192 |
| Losartan Potassium | 296 | 102 |
| Amlodipine Besylate | 257 | 93 |
| Levothyroxine Sodium | 241 | 85 |
| Atenolol | 223 | 79 |
| Lisinopril | 193 | 74 |
| Hydrocodone/Acetaminophen |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-27
- Last updated
- 2021-12-13
Frequently asked questions
- What is Karen Ouyang-Shwe's NPI number?
- Karen Ouyang-Shwe's National Provider Identifier (NPI) is 1831275353, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Ouyang-Shwe's specialty?
- Karen Ouyang-Shwe is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Ouyang-Shwe located?
- Karen Ouyang-Shwe's practice location on file with NPPES is 260 International Cir, San Jose, CA 95119-1130.
- What is Karen Ouyang-Shwe's phone number?
- The practice phone number listed in the NPPES registry for Karen Ouyang-Shwe is (408) 972-7000.
- Does Karen Ouyang-Shwe accept Medicare?
- Karen Ouyang-Shwe is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Ouyang-Shwe's NPI active?
- Yes — Karen Ouyang-Shwe's NPI (1831275353) is active in the NPPES registry as of the last update on 2021-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.