Official source Data mirrored from Centers for Medicare & Medicaid Services Open Payments · General Payments · as published 2026-01-23 View official record Methodology

Covered recipient · General Payments record

DONALD Y SIAO

Allopathic & Osteopathic Physicians Family Medicine

NPI
1861415374
CMS profile
175542
Location
SAN JOSE, CA

General Payments · PY2018–2024

$19,933.08

  • Reported across 1,086 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$675.39

26 records · 0 disputed

Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.

How these totals are calculated
  • The total is the sum of the General Payments records CMS published for the labeled program year(s), exactly as published. Nothing is estimated, weighted, or combined across categories.
  • General Payments only. Research and Ownership/Investment are separate datasets and are never summed with these figures; amounts are kept separate per program year.
  • Featured-page threshold (a presentation gate, not a judgment): records>=3 OR total>=100 (all years).
  • Methodology & Data — sourcing, labeling, and limitations.

By nature of payment

PY2024 · sorted by reported total

Nature of paymentAmountRecords
Food and Beverage $675.39 26

By paying entity

PY2024 · sorted by reported total

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $3,546.45 190
PY2019 $2,490.16 167
PY2020 $3,055.40 174
PY2021 $3,984.64 218
PY2022 $3,250.22 171
PY2023 $2,930.82 140
PY2024 $675.39 26

Payment records · PY2024 (26)

Sorted by paying entity, then date · as published by CMS

Program year 2024 201820192020202120222023 Record-level detail is published for PY2024; earlier years are summarised in “By program year”.
Paying entity Amount Date Nature of payment Dispute status Published Record ID Source
Abbott Laboratories $13.75 02/18/2024 Food and Beverage Undisputed 01/23/2026 1125307163 CMS
Amgen Inc. $28.85 01/10/2024 Food and Beverage Undisputed 01/23/2026 1117382680 CMS
Amgen Inc. $16.28 04/02/2024 Food and Beverage Undisputed 01/23/2026 1111707388 CMS
Astellas Pharma US Inc $26.31 01/20/2024 Food and Beverage Undisputed 01/23/2026 1139319514 CMS
Astellas Pharma US Inc $25.11 09/19/2024 Food and Beverage Undisputed 01/23/2026 1139404765 CMS
AstraZeneca Pharmaceuticals LP $27.42 02/01/2024 Food and Beverage Undisputed 01/23/2026 1104339322 CMS
Bayer Healthcare Pharmaceuticals Inc. $21.87 03/22/2024 Food and Beverage Undisputed 01/23/2026 1086196986 CMS
CMP Pharma, Inc. $21.15 05/22/2024 Food and Beverage Undisputed 01/23/2026 1094608600 CMS
CMP Pharma, Inc. $22.92 08/28/2024 Food and Beverage Undisputed 01/23/2026 1094608679 CMS
CMP Pharma, Inc. $25.00 11/06/2024 Food and Beverage Undisputed 01/23/2026 1094608754 CMS
CMP Pharma, Inc. $22.92 12/18/2024 Food and Beverage Undisputed 01/23/2026 1094608816 CMS
Exact Sciences Corporation $23.68 01/30/2024 Food and Beverage Undisputed 01/23/2026 1114898042 CMS
Exact Sciences Corporation $17.47 05/23/2024 Food and Beverage Undisputed 01/23/2026 1114898046 CMS
Exact Sciences Corporation $19.39 09/25/2024 Food and Beverage Undisputed 01/23/2026 1114898050 CMS
Exact Sciences Corporation $21.42 11/21/2024 Food and Beverage Undisputed 01/23/2026 1114898054 CMS
GlaxoSmithKline, LLC. $19.12 01/18/2024 Food and Beverage Undisputed 01/23/2026 1116489462 CMS
IBSA Pharma Inc. $13.97 01/19/2024 Food and Beverage Undisputed 01/23/2026 1142983968 CMS
IBSA Pharma Inc. $125.00 02/15/2024 Food and Beverage Undisputed 01/23/2026 1142976878 CMS
Lilly USA, LLC $24.91 02/17/2024 Food and Beverage Undisputed 01/23/2026 1136148118 CMS
Lilly USA, LLC $22.45 04/11/2024 Food and Beverage Undisputed 01/23/2026 1136169781 CMS
Lilly USA, LLC $23.82 05/01/2024 Food and Beverage Undisputed 01/23/2026 1136146159 CMS
Lilly USA, LLC $27.96 08/26/2024 Food and Beverage Undisputed 01/23/2026 1136148836 CMS
Merck Sharp & Dohme LLC $26.96 08/21/2024 Food and Beverage Undisputed 01/23/2026 1141883560 CMS
Novo Nordisk Inc $24.30 02/15/2024 Food and Beverage Undisputed 01/23/2026 1096859046 CMS
Novo Nordisk Inc $19.05 03/05/2024 Food and Beverage Undisputed 01/23/2026 1097796597 CMS
Novo Nordisk Inc $14.31 04/25/2024 Food and Beverage Undisputed 01/23/2026 1097671554 CMS

Source & provenance

Dataset
CMS Open Payments — General Payments
Publisher of source data
Centers for Medicare & Medicaid Services
CMS publication date
2026-01-23
Program years on this page
2018, 2019, 2020, 2021, 2022, 2023, 2024
Source files
Dataset page · Bulk file · PY2018 , PY2019 , PY2020 , PY2021 , PY2022 , PY2023 , PY2024
Generated from
OP_DTL_GNRL_PGYR2024_P01232026_01102026.csv

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