Liyan Zhang, MD
NPI 1033297874 · Internal Medicine Physician · Vacaville, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Liyan Zhang, MD is a Internal Medicine Physician provider in Vacaville, CA (NPI 1033297874).
Provider details
- NPI number
- 1033297874
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A79647 (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 · 98 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 527 | 178 |
| Levothyroxine Sodium | 286 | 89 |
| Lisinopril | 250 | 85 |
| Amlodipine Besylate | 250 | 86 |
| Famotidine | 248 | 97 |
| Losartan Potassium | 229 | 79 |
| Fluticasone Propionate | 175 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2021-12-08
Frequently asked questions
- What is Liyan Zhang's NPI number?
- Liyan Zhang's National Provider Identifier (NPI) is 1033297874, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Liyan Zhang's specialty?
- Liyan Zhang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Liyan Zhang located?
- Liyan Zhang's practice location on file with NPPES is 1 Quality Dr, Vacaville, CA 95688-9494.
- What is Liyan Zhang's phone number?
- The practice phone number listed in the NPPES registry for Liyan Zhang is (707) 453-5000.
- Does Liyan Zhang accept Medicare?
- Liyan Zhang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Liyan Zhang's NPI active?
- Yes — Liyan Zhang's NPI (1033297874) is active in the NPPES registry as of the last update on 2021-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.