SANDY LI TAM MD
NPI 1831498161
Internal Medicine in Stanford, CA
About Sandy Li Tam Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SANDY LI TAM MD (NPI 1831498161) is an individual internal medicine provider in Stanford, California, licensed in California (A113930) and active in the NPI registry since March 2011. She is enrolled in Medicare PECOS and is a graduate of University Of California, Geffen School Of Medicine (2009).
NPPES Registry Identity
Specialties & Licenses
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
Sandy Li Tam 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 Sandy Tam reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Palo Alto, CA 94306
- Reassigned Medicare billing, California enrollment
- 2,460 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.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94305 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
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 Sandy Tam's NPI number?
The NPI number for Sandy Tam is 1831498161. It was assigned to this individual provider in the NPPES registry on March 25, 2011.
Where is Sandy Tam located?
Sandy Tam practices at 300 Pasteur Drive Grant Building, Room S101, Stanford, CA 94305. The listed phone number is (650) 498-4556.
What is Sandy Tam's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Sandy Tam enrolled in Medicare?
Yes. Sandy Tam 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 Sandy Tam's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sandy Tam reassigns Medicare benefits to County Of Santa Clara (Palo Alto, 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 Sandy Tam'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 Sandy Tam was last updated on April 8, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Sandy Li Tam, MD · NPI 1831498161
Internal Medicine physician in Stanford, California. Individual provider, active in the CMS NPPES registry since March 25, 2011.
## Identity
- **NPI:** 1831498161 (Entity type: Individual)
- **Enumerated:** March 25, 2011
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A113930 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 PASTEUR DRIVE, GRANT BUILDING, ROOM S101, Stanford, CA 94305
- **Phone:** (650) 498-4556
## 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:** County Of Santa Clara (NPI 1144330614, Palo Alto, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Geffen School Of Medicine, class of 2009
## Record status
- **NPPES last updated:** April 8, 2011
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Source: [NPI Profile](https://npiprofile.com/npi/1831498161) · Data from the CMS NPPES public registry.