NPPES file of Aug 9, 2026

Tiffany Sia, M.D.

Gynecologic Oncology Physician · Campbell, CA

Tiffany Sia, M.D. is a gynecologic oncology physician with a practice address in Campbell, California, and NPI 1760915912, issued on Apr 5, 2017. Check the license (California A202617, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1760915912
Name
Tiffany Sia
Credential
M.D.
Primary taxonomy
Gynecologic Oncology Physician 207VX0201X
License number
A202617 CA
Self-reported in NPPES; status is on the state search
Practice location
910 Campisi Way Ste 2A, Campbell, CA 95008
Phone
(408) 827-4274
Enumerated
Apr 5, 2017
Record last updated
Aug 6, 2025
Medicare enrollment
Enrolled (PECOS I20251008001974); accepts Medicare assignment
Medical or professional school
Columbia University College Of Physicians And Surgeons, 2017
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 910 Campisi Way Ste 2A

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Juliana Arenas Velasquez, PA-CPhysician Assistant1396577391
  2. Helen DinhPhysician Assistant1255055422
  3. Elaine Lee, M.D.Surgery Physician1619243086
  4. James Lilja, M.D.Gynecologic Oncology Physician1225081441

Verify Tiffany Sia in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A202617    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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85% fewer Medicare Part D claims than the average gynecologic oncology physician in 2024

29 Medicare Part D claims for 19 beneficiaries, against an average of 195 among the 1,475 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.

  1. Tiffany Sia29
  2. Specialty average195

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $108.63

1 payment: food and beverage; the largest payer was Abbvie Inc. The 1,199 providers of this specialty with any payment received $6,387.20 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Tiffany Sia$108.63
  2. Specialty average$6,387.20

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through 2 group practices

  1. Bay Area Gynecology Oncology IncCampbell, CA
  2. Washington Township Medical FoundationFremont, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Gynecologic Oncology Physician providers in California

There are 176 gynecologic oncology physician records in California.

All 176 in California → Every provider in Campbell →

Other gynecologic oncology physician records in California

  1. Lisa Abaid, M.D., M.P.H.Newport Beach, CA1295943132
  2. Alireza Abidi, M.D.Sacramento, CA1215919477
  3. Federico Alva, M.D.Northridge, CA1649200379
  4. Edwin Alvarez, M.D.Sacramento, CA1710197330
  5. Kristen Anderson, M.D., PH.D.Moreno Valley, CA1447575568
  6. Melanie Arora, M.D.Apple Valley, CA1578889283
  7. Fikret Atamdede, M.D.Torrance, CA1578502480
  8. Samuel Ballon, M.D.Los Gatos, CA1760408173
  9. Alice Barr, MDSacramento, CA1982109286
  10. Lisa Bean, M.D.Calexico, CA1760782817

Common questions

What is Tiffany Sia, M.D.'s NPI number?

Tiffany Sia, M.D.'s National Provider Identifier (NPI) is 1760915912, issued on Apr 5, 2017. An NPI identifies a provider in billing; it is not a license.

Where is Tiffany Sia, M.D. located?

The NPPES record lists a practice address at 910 Campisi Way Ste 2A, Campbell, CA, 95008. Phone: (408) 827-4274. Providers update this record themselves, so call before visiting.

How can I verify Tiffany Sia, M.D.'s license?

NPPES lists California license number A202617, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Tiffany Sia, M.D. prescribe under Medicare Part D?

In 2024, Tiffany Sia, M.D. had 29 Medicare Part D claims for 19 beneficiaries; the average among gynecologic oncology physician prescribers was 195. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.