Yi Yi Liu, MD
NPI 1255416236 · Family Medicine Physician · San Mateo, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Yi Yi Liu, MD is a Family Medicine Physician provider in San Mateo, CA (NPI 1255416236).
Provider details
- NPI number
- 1255416236
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A65470 (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 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 137 | 46 |
| Losartan Potassium | 97 | 25 |
| Metformin Hcl | 85 | 26 |
| Amlodipine Besylate | 85 | 30 |
| Lisinopril | 82 | 26 |
| Levothyroxine Sodium | 71 | 22 |
| Fluticasone Propionate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-26
- Last updated
- 2011-12-27
Frequently asked questions
- What is Yi Yi Liu's NPI number?
- Yi Yi Liu's National Provider Identifier (NPI) is 1255416236, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Yi Yi Liu's specialty?
- Yi Yi Liu is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Yi Yi Liu located?
- Yi Yi Liu's practice location on file with NPPES is 222 W 39th Ave, San Mateo, CA 94403-4364.
- What is Yi Yi Liu's phone number?
- The practice phone number listed in the NPPES registry for Yi Yi Liu is (650) 573-3702.
- Does Yi Yi Liu accept Medicare?
- Yi Yi Liu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Yi Yi Liu's NPI active?
- Yes — Yi Yi Liu's NPI (1255416236) is active in the NPPES registry as of the last update on 2011-12-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.