DR. TIFFANY SIA M.D.
NPI 1760915912
Obstetrics & Gynecology - Gynecologic Oncology in Campbell, CA
About Dr. Tiffany Sia M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TIFFANY SIA M.D. (NPI 1760915912) is an individual gynecologic oncology provider in Campbell, California, licensed in California (A202617) and active in the NPI registry since April 2017. She is enrolled in Medicare PECOS and is a graduate of Columbia University College Of Physicians And Surgeons (2017).
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
Dr. Tiffany Sia M.d. 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 Reassignments
2Medicare enrollment records show Tiffany Sia reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Campbell, CA 95008
- Reassigned Medicare billing, California enrollment
- 6 clinicians in this Medicare group
Fremont, CA 94538
- Reassigned Medicare billing, California enrollment
- 121 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 95008 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 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CAMPBELL, CA 95008
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 Tiffany Sia's NPI number?
The NPI number for Tiffany Sia is 1760915912. It was assigned to this individual provider in the NPPES registry on April 5, 2017.
Where is Tiffany Sia located?
Tiffany Sia practices at 910 Campisi Way Ste 2A, Campbell, CA 95008. The listed phone number is (408) 827-4274.
What is Tiffany Sia's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecologic Oncology, with taxonomy code 207VX0201X.
Is Tiffany Sia enrolled in Medicare?
Yes. Tiffany Sia 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 organizations bill Medicare for Tiffany Sia's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tiffany Sia reassigns Medicare benefits to 2 organizations: Bay Area Gynecology Oncology Inc (Campbell, CA) and Washington Township Medical Foundation (Fremont, CA). Each 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 Tiffany Sia'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 Tiffany Sia was last updated on August 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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.
# Dr. Tiffany Sia, M.D. · NPI 1760915912
Gynecologic Oncology physician in Campbell, California. Individual provider, active in the CMS NPPES registry since April 5, 2017.
## Identity
- **NPI:** 1760915912 (Entity type: Individual)
- **Enumerated:** April 5, 2017
- **Primary specialty:** Obstetrics & Gynecology - Gynecologic Oncology · taxonomy 207VX0201X
- **State license:** A202617 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 910 CAMPISI WAY STE 2A, Campbell, CA 95008-2351
- **Phone:** (408) 827-4274
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Bay Area Gynecology Oncology Inc (NPI 1891801122, Campbell, CA); Washington Township Medical Foundation (NPI 1346557014, Fremont, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Columbia University College Of Physicians And Surgeons, class of 2017
## Record status
- **NPPES last updated:** August 6, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1760915912) · Data from the CMS NPPES public registry.