Timothy Liu, M.D., M.S.
NPI 1134495450 · Internal Medicine Physician · Kentfield, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Liu, M.D., M.S. is a Internal Medicine Physician provider in Kentfield, CA (NPI 1134495450).
Provider details
- NPI number
- 1134495450
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., M.S.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A128408 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,816 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 783 | $118 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 496 | $127 |
| Advance Care Planning, First 30 Minutes99497 | 126 | $81 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 | 117 | $196 |
| Advance Care Planning, First 30 Minutes99497 | 60 | $97 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 35 | 11 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 32 | 16 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 24 | — |
| Levothyroxine Sodium | 24 | — |
| Atorvastatin Calcium | 22 | 18 |
| Furosemide | 16 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-03-30
- Last updated
- 2023-07-12
- Certified
- 2023-07-12
Frequently asked questions
- What is Timothy Liu's NPI number?
- Timothy Liu's National Provider Identifier (NPI) is 1134495450, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Liu's specialty?
- Timothy Liu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Liu located?
- Timothy Liu's practice location on file with NPPES is 1125 Sir Francis Drake Blvd, Kentfield, CA 94904-1418.
- What is Timothy Liu's phone number?
- The practice phone number listed in the NPPES registry for Timothy Liu is (415) 456-9680.
- Does Timothy Liu accept Medicare?
- Timothy Liu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Liu's NPI active?
- Yes — Timothy Liu's NPI (1134495450) is active in the NPPES registry as of the last update on 2023-07-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.