Tiffany Y Sia, MD
Obstetrics/Gynecology · Campbell
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 27
- 7 carriers
- Offices
- 2
Offices
2 locations · Bay Area Gynecology Oncology Inc · Washington Township Medical Foundation
Looking this up.
Plans that list them
27 plans · 7 carriers
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Sia’s office to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
27 of 27 plans
| Alignment Health Advantage PPO (PPO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health BreathEasy (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Clarity (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Harmony (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes CalPlus (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes Care (HMO C-SNP) | Alignment Health Plan | Listed | Sep 28, 2026 |
| Alignment Health Heart & Diabetes Choice (HMO C-SNP) | Alignment Health Plan | Listed | Sep 28, 2026 |
| Alignment Health Honor+ Plan (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health My Choice CalCare (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Silicon (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health smartHMO (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health the ONE (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Anthem Full Dual Advantage Aligned (HMO D-SNP) | Anthem Blue Cross | Listed | Oct 3, 2026 |
| Anthem Medicare Advantage (HMO-POS) | Anthem Blue Cross | Listed | Oct 3, 2026 |
| Anthem Prime (HMO-POS) | Anthem Blue Cross Partnership Plan | Listed | Oct 3, 2026 |
| Astiva Health C-SNP WOW - NorCal (HMO C-SNP) | Astiva Health | Listed | Sep 27, 2026 |
| Astiva Health Premier Plan - NorCal (HMO) | Astiva Health | Listed | Sep 27, 2026 |
| Astiva Health Savings Plan - NorCal (HMO) | Astiva Health | Listed | Sep 27, 2026 |
| Imperial Courage Plan (HMO) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
| Imperial Dynamic Plan (HMO) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
| Imperial Senior Value (HMO C-SNP) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
| SCAN Balance (HMO C-SNP) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN Classic (HMO) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN MyChoice (HMO) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN Strive (HMO C-SNP) | SCAN Health Plan | Listed | Oct 3, 2026 |
| DualConnect (HMO D-SNP) | Santa Clara Family Health Plan | Listed | Sep 1, 2026 |
Original Medicare doctor bills
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
Procedures Medicare counted
| Colonoscopy | 1-10 | None |
| Removal of the uterus | 1-10 | None |
Money from drug and device companies
$395 in 2025
| 2025 | 8 | 9 | None | $395 |
| 2024 | 1 | 1 | None | $109 |
| 2023 | 1 | 1 | None | $124 |
| 2022 | 1 | 1 | None | $125 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| AstraZeneca Pharmaceuticals LP | Lynparza | $121 | 1 payment
|
| Integra LifeSciences | Codman Certas | $93 | 2 payments
|
| Smith+Nephew | Stravix | $48 | 1 payment
|
| Baxter Healthcare | Floseal | $31 | 1 payment
|
| Intuitive Surgical | Da Vinci Surgical System | $29 | 1 payment
|
| Merck Sharp & Dohme | Keytruda | $26 | 1 payment
|
See all 9 published payments
| Abbvie | Meals · 2025-12-16 | Botox | $22 |
| AstraZeneca Pharmaceuticals LP | Meals · 2025-12-04 | Lynparza | $121 |
| Baxter Healthcare | Meals · 2025-11-24 | Floseal | $31 |
| Verastem | Meals · 2025-11-17 | Avmapki Fakzynja Co-Pack | $24 |
| Merck Sharp & Dohme | Meals · 2025-10-06 | Keytruda | $26 |
| Smith+Nephew | Meals · 2025-09-16 | Stravix | $48 |
| Integra LifeSciences | Meals · 2025-09-09 | Codman Certas | $18 |
| Intuitive Surgical | Meals · 2025-05-13 | Da Vinci Surgical System | $29 |
| Integra LifeSciences | Meals · 2025-04-22 | Codman Certas | $76 |
See earlier years (2024, 2023, 2022)
2024: $109
| Abbvie | Elahere | $109 | 1 payment
|
2023: $124
| AstraZeneca Pharmaceuticals LP | Lynparza | $124 | 1 payment
|
2022: $125
| GlaxoSmithKline | Zejula | $125 | 1 payment
|
Professional record
- NPI
- 1760915912
- Trained
- Columbia University College of Physicians and Surgeons, 2017
- Group
- Bay Area Gynecology Oncology Inc · Washington Township Medical Foundation
- Video visits
- Lists video visits
- Gender
- Female
More record details
- Sole proprietor
- No
- Taxonomy
- Federal specialty code 207VX0201X (207VX0201X)
- Mailing address
- 910 Campisi Way Ste 2a, Campbell, CA, 95008
- NPI first listed
- 2017-04-05
- NPI last updated
- 2025-08-06
- NPI record certified
- 2025-07-15
This is when the NPI record was last certified, not a medical board exam.