Timothy Liao, MD
NPI 1114005733 · Internal Medicine Physician · South San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Liao, MD is a Internal Medicine Physician provider in South San Francisco, CA (NPI 1114005733).
Provider details
- NPI number
- 1114005733
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A86483 (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 · 104 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 448 | 176 |
| Lisinopril | 268 | 107 |
| Amlodipine Besylate | 233 | 98 |
| Rosuvastatin Calcium | 227 | 90 |
| Losartan Potassium | 224 | 84 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 209 | 44 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2021-11-29
Frequently asked questions
- What is Timothy Liao's NPI number?
- Timothy Liao's National Provider Identifier (NPI) is 1114005733, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Liao's specialty?
- Timothy Liao is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Liao located?
- Timothy Liao's practice location on file with NPPES is 1200 El Camino Real, South San Francisco, CA 94080-3208.
- What is Timothy Liao's phone number?
- The practice phone number listed in the NPPES registry for Timothy Liao is (650) 742-2000.
- Does Timothy Liao accept Medicare?
- Timothy Liao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Liao's NPI active?
- Yes — Timothy Liao's NPI (1114005733) is active in the NPPES registry as of the last update on 2021-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.