Xiaonan Xuan, M.D.
NPI 1144465683 · Internal Medicine Physician · San Leandro, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Xiaonan Xuan, M.D. is a Internal Medicine Physician provider in San Leandro, CA (NPI 1144465683).
Provider details
- NPI number
- 1144465683
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A118043 (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
17 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 · 86 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 724 | 246 |
| Amlodipine Besylate | 322 | 114 |
| Losartan Potassium | 319 | 107 |
| Metformin Hclbrand: Metformin Hcl Er | 291 | 94 |
| Alendronate Sodium | 223 | 75 |
| Losartan/Hydrochlorothiazidebrand: Losartan-Hydrochlorothiazide | 212 | 71 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-12-12
- Last updated
- 2021-12-15
Frequently asked questions
- What is Xiaonan Xuan's NPI number?
- Xiaonan Xuan's National Provider Identifier (NPI) is 1144465683, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Xiaonan Xuan's specialty?
- Xiaonan Xuan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Xiaonan Xuan located?
- Xiaonan Xuan's practice location on file with NPPES is 2500 Merced St, San Leandro, CA 94577-4201.
- What is Xiaonan Xuan's phone number?
- The practice phone number listed in the NPPES registry for Xiaonan Xuan is (510) 454-1000.
- Does Xiaonan Xuan accept Medicare?
- Xiaonan Xuan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Xiaonan Xuan's NPI active?
- Yes — Xiaonan Xuan's NPI (1144465683) is active in the NPPES registry as of the last update on 2021-12-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.