IndustryPayments
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

KENNETH WEITUNG LIEN

Allopathic & Osteopathic Physicians Allergy & Immunology Allergy

NPI
1396823092
CMS profile
335297
Location
CASTRO VALLEY, CA

General Payments · PY2018–2024

$8,251.89

  • Reported across 423 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$1,375.77

47 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.

Related groups: Allergy CA All categories

By nature of payment

PY2024 · sorted by reported total

Nature of paymentAmountRecords
Food and Beverage $1,303.77 46
Education $72.00 1

By paying entity

PY2024 · sorted by reported total

Paying entityAmountRecords
Acerta Pharma LLC $630.71 22
Regeneron Healthcare Solutions, Inc. $178.71 5
GENZYME CORPORATION $174.43 6
Greer Laboratories, Inc. $154.56 5
Genentech USA, Inc. $89.65 4
SANOFI-AVENTIS U.S. LLC $72.00 1
PFIZER INC. $38.77 2
NOVARTIS PHARMACEUTICALS CORPORATION $23.46 1
GlaxoSmithKline, LLC. $13.48 1

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $1,509.74 103
PY2019 $797.32 49
PY2020 $797.64 41
PY2021 $1,294.62 58
PY2022 $1,058.37 48
PY2023 $1,418.43 77
PY2024 $1,375.77 47

Payment records · PY2024 (47)

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
AstraZeneca Pharmaceuticals LP $48.55 01/24/2024 Food and Beverage Undisputed 01/23/2026 1104635977 CMS
AstraZeneca Pharmaceuticals LP $13.73 01/24/2024 Food and Beverage Undisputed 01/23/2026 1105664646 CMS
AstraZeneca Pharmaceuticals LP $28.88 02/09/2024 Food and Beverage Undisputed 01/23/2026 1104414687 CMS
AstraZeneca Pharmaceuticals LP $34.60 03/13/2024 Food and Beverage Undisputed 01/23/2026 1105559142 CMS
AstraZeneca Pharmaceuticals LP $31.83 04/11/2024 Food and Beverage Undisputed 01/23/2026 1105502586 CMS
AstraZeneca Pharmaceuticals LP $34.81 04/25/2024 Food and Beverage Undisputed 01/23/2026 1105359275 CMS
AstraZeneca Pharmaceuticals LP $28.88 05/31/2024 Food and Beverage Undisputed 01/23/2026 1104491910 CMS
AstraZeneca Pharmaceuticals LP $13.78 06/13/2024 Food and Beverage Undisputed 01/23/2026 1104380707 CMS
AstraZeneca Pharmaceuticals LP $25.71 06/19/2024 Food and Beverage Undisputed 01/23/2026 1104562680 CMS
AstraZeneca Pharmaceuticals LP $33.28 07/23/2024 Food and Beverage Undisputed 01/23/2026 1104239637 CMS
AstraZeneca Pharmaceuticals LP $29.13 08/01/2024 Food and Beverage Undisputed 01/23/2026 1105819445 CMS
AstraZeneca Pharmaceuticals LP $15.31 08/05/2024 Food and Beverage Undisputed 01/23/2026 1105647900 CMS
AstraZeneca Pharmaceuticals LP $29.04 08/23/2024 Food and Beverage Undisputed 01/23/2026 1105742162 CMS
AstraZeneca Pharmaceuticals LP $33.63 08/30/2024 Food and Beverage Undisputed 01/23/2026 1104221927 CMS
AstraZeneca Pharmaceuticals LP $21.53 09/17/2024 Food and Beverage Undisputed 01/23/2026 1105448645 CMS
AstraZeneca Pharmaceuticals LP $33.56 09/20/2024 Food and Beverage Undisputed 01/23/2026 1104402157 CMS
AstraZeneca Pharmaceuticals LP $21.94 09/26/2024 Food and Beverage Undisputed 01/23/2026 1104591470 CMS
AstraZeneca Pharmaceuticals LP $32.92 10/22/2024 Food and Beverage Undisputed 01/23/2026 1105284121 CMS
AstraZeneca Pharmaceuticals LP $25.47 10/25/2024 Food and Beverage Undisputed 01/23/2026 1104502982 CMS
AstraZeneca Pharmaceuticals LP $33.86 11/06/2024 Food and Beverage Undisputed 01/23/2026 1105830143 CMS
AstraZeneca Pharmaceuticals LP $30.94 11/07/2024 Food and Beverage Undisputed 01/23/2026 1105540571 CMS
AstraZeneca Pharmaceuticals LP $29.33 11/26/2024 Food and Beverage Undisputed 01/23/2026 1105384406 CMS
Genentech USA, Inc. $24.89 03/05/2024 Food and Beverage Undisputed 01/23/2026 1133047125 CMS
Genentech USA, Inc. $34.86 08/20/2024 Food and Beverage Undisputed 01/23/2026 1133047129 CMS
Genentech USA, Inc. $15.29 10/31/2024 Food and Beverage Undisputed 01/23/2026 1133047133 CMS
Genentech USA, Inc. $14.61 12/16/2024 Food and Beverage Undisputed 01/23/2026 1133047137 CMS
GENZYME CORPORATION $32.68 01/25/2024 Food and Beverage Undisputed 01/23/2026 1139695984 CMS
GENZYME CORPORATION $12.58 04/30/2024 Food and Beverage Undisputed 01/23/2026 1139696024 CMS
GENZYME CORPORATION $36.71 05/14/2024 Food and Beverage Undisputed 01/23/2026 1139696034 CMS
GENZYME CORPORATION $37.40 07/25/2024 Food and Beverage Undisputed 01/23/2026 1139696058 CMS
GENZYME CORPORATION $40.72 08/14/2024 Food and Beverage Undisputed 01/23/2026 1139696076 CMS
GENZYME CORPORATION $14.34 10/29/2024 Food and Beverage Undisputed 01/23/2026 1139696100 CMS
GlaxoSmithKline, LLC. $13.48 04/17/2024 Food and Beverage Undisputed 01/23/2026 1116132282 CMS
Greer Laboratories, Inc. $41.07 01/29/2024 Food and Beverage Undisputed 01/23/2026 1131113575 CMS
Greer Laboratories, Inc. $28.66 03/26/2024 Food and Beverage Undisputed 01/23/2026 1131113582 CMS
Greer Laboratories, Inc. $32.95 06/05/2024 Food and Beverage Undisputed 01/23/2026 1131113587 CMS
Greer Laboratories, Inc. $23.48 09/04/2024 Food and Beverage Undisputed 01/23/2026 1131113595 CMS
Greer Laboratories, Inc. $28.40 12/04/2024 Food and Beverage Undisputed 01/23/2026 1131113602 CMS
Novartis Pharmaceuticals Corporation $23.46 08/28/2024 Food and Beverage Undisputed 01/23/2026 1086998842 CMS
PFIZER INC. $13.45 09/11/2024 Food and Beverage Undisputed 01/23/2026 1132061090 CMS
PFIZER INC. $25.32 11/07/2024 Food and Beverage Undisputed 01/23/2026 1132117510 CMS
Regeneron Healthcare Solutions, Inc. $37.08 04/02/2024 Food and Beverage Undisputed 01/23/2026 1114100966 CMS
Regeneron Healthcare Solutions, Inc. $39.44 07/11/2024 Food and Beverage Undisputed 01/23/2026 1114100968 CMS
Regeneron Healthcare Solutions, Inc. $30.56 09/10/2024 Food and Beverage Undisputed 01/23/2026 1114100970 CMS
Regeneron Healthcare Solutions, Inc. $34.47 10/22/2024 Food and Beverage Undisputed 01/23/2026 1114100972 CMS
Regeneron Healthcare Solutions, Inc. $37.16 12/06/2024 Food and Beverage Undisputed 01/23/2026 1114100975 CMS
SANOFI-AVENTIS U.S. LLC $72.00 08/30/2024 Education Undisputed 01/23/2026 1139696070 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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