TIMOTHY E. LIAO MD
NPI 1114005733
Internal Medicine in South San Francisco, CA
About Timothy E. Liao Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TIMOTHY E. LIAO MD (NPI 1114005733) is an individual internal medicine provider in South San Francisco, California, licensed in California (A86483) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of University Of North Carolina At Chapel Hill School Of Medicine (2002).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Timothy E. Liao Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Timothy Liao reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Oxnard, CA 93036
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94080 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Timothy Liao's NPI number?
The NPI number for Timothy Liao is 1114005733. It was assigned to this individual provider in the NPPES registry on November 1, 2006.
Where is Timothy Liao located?
Timothy Liao practices at 1200 El Camino Real, South San Francisco, CA 94080. The listed phone number is (650) 742-2000.
What is Timothy Liao's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Timothy Liao enrolled in Medicare?
Yes. Timothy Liao is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Timothy Liao's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Liao reassigns Medicare benefits to Southern California Permanente Medical Group (Oxnard, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Timothy Liao's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Timothy Liao was last updated on November 29, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Timothy E. Liao, MD · NPI 1114005733
Internal Medicine physician in South San Francisco, California. Individual provider, active in the CMS NPPES registry since November 1, 2006.
## Identity
- **NPI:** 1114005733 (Entity type: Individual)
- **Enumerated:** November 1, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A86483 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1200 EL CAMINO REAL, South San Francisco, CA 94080-3208
- **Phone:** (650) 742-2000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Southern California Permanente Medical Group (NPI 1275756652, Oxnard, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of North Carolina At Chapel Hill School Of Medicine, class of 2002
## Record status
- **NPPES last updated:** November 29, 2021
- **Other identifiers:** Medicaid 00A864830 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1114005733) · Data from the CMS NPPES public registry.