Reflects CMS Open Payments as of 2026-07-26T04:22:22Z. CMS updates this data on an annual cycle, and corrections or successful disputes made at CMS may not yet appear here. The official CMS record is authoritative for the current state. View the official CMS record ↗

Covered recipient · General Payments record

KENNETH WEITUNG LIEN

Allopathic & Osteopathic Physicians Allergy & Immunology Allergy

NPI: 1396823092
CMS profile: 335297
Location: CASTRO VALLEY, CA

A name match is not confirmation of identity. CMS publishes records for different people under similar names; the NPI, specialty, and location shown on this page are the CMS-published fields that distinguish them.

General Payments · PY2019–2025

CMS publication 2026-06-30

Latest program year · PY2025

$2,085.13

83 records · 0 disputed

“Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.”
— Centers for Medicare & Medicaid Services, Open Payments

A reported payment reflects a financial relationship a company disclosed. It does not indicate wrongdoing or a conflict of interest, and it says nothing about the quality of a provider's care.

These records are submitted to CMS and attested to by the reporting companies. CMS publishes them as reported; this site mirrors them without independent verification.

A payment attributed to a provider may have been made to a third party — a hospital, practice, or research institution — rather than paid to the provider personally.

How these totals are calculated

This total is the sum of the individual General Payments record amounts CMS published for the labeled program year(s); each record amount is used unmodified. The total itself is computed by this site. 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) AND records>=2 AND NPI identity (all years).
Methodology & Data — sourcing, labeling, and limitations.

By nature of payment

PY2025 · sorted by reported total

Nature of payment	Amount	Records
Food and Beverage	$2,069.86	82
Education	$15.27	1

By paying entity

PY2025 · sorted by reported total

Paying entity	Amount	Records
Acerta Pharma LLC	$743.44	28
GENZYME CORPORATION	$225.23	11
Regeneron Healthcare Solutions, Inc.	$203.99	6
Amgen Inc.	$194.47	8
Lilly USA, LLC	$134.53	5
GlaxoSmithKline, LLC.	$117.15	4
Greer Laboratories, Inc.	$82.73	4
Genentech USA, Inc.	$59.16	3
Takeda Pharmaceuticals U.S.A., Inc.	$56.71	2
BioCryst US Sales Co., LLC	$51.57	1
ALK-Abello, Inc	$45.84	3
PFIZER INC.	$33.05	2
Exelixis Inc.	$31.09	1
NOVARTIS PHARMACEUTICALS CORPORATION	$29.84	2
ARS Pharmaceuticals Operations, Inc.	$27.40	1
OptiNose US, Inc.	$26.76	1
Organon LLC	$22.17	1

By program year

All program years on this page · sorted by year

Program year	Amount	Records
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
PY2025	$2,085.13	83

Payment records · PY2025 (83)

Ordering applied by this site (date, newest first, then paying entity) · record values are shown as CMS published them

Program year 2025 2019 2020 2021 2022 2023 2024 Record-level detail is published for PY2025; earlier years are summarised in “By program year”.

Paying entity	Amount	Date	Nature of payment	Dispute status	Published	Record ID	Source
GENZYME CORPORATION	$12.50	12/18/2025	Food and Beverage	No dispute reported	06/30/2026	1233340652	CMS
Amgen Inc.	$27.92	12/16/2025	Food and Beverage	No dispute reported	06/30/2026	1228301974	CMS
AstraZeneca Pharmaceuticals LP	$33.37	12/12/2025	Food and Beverage	No dispute reported	06/30/2026	1206831383	CMS
AstraZeneca Pharmaceuticals LP	$28.20	12/10/2025	Food and Beverage	No dispute reported	06/30/2026	1206812285	CMS
Greer Laboratories, Inc.	$21.18	12/02/2025	Food and Beverage	No dispute reported	06/30/2026	1240086021	CMS
GlaxoSmithKline, LLC.	$26.04	11/20/2025	Food and Beverage	No dispute reported	06/30/2026	1190662041	CMS
AstraZeneca Pharmaceuticals LP	$26.10	11/19/2025	Food and Beverage	No dispute reported	06/30/2026	1206199808	CMS
AstraZeneca Pharmaceuticals LP	$15.95	11/19/2025	Food and Beverage	No dispute reported	06/30/2026	1206667095	CMS
GENZYME CORPORATION	$36.50	10/30/2025	Food and Beverage	No dispute reported	06/30/2026	1233340644	CMS
AstraZeneca Pharmaceuticals LP	$13.97	10/28/2025	Food and Beverage	No dispute reported	06/30/2026	1206176424	CMS
ALK-Abello, Inc	$15.55	10/27/2025	Food and Beverage	No dispute reported	06/30/2026	1222415664	CMS
GENZYME CORPORATION	$9.91	10/24/2025	Food and Beverage	No dispute reported	06/30/2026	1233340650	CMS
GENZYME CORPORATION	$16.55	10/14/2025	Food and Beverage	No dispute reported	06/30/2026	1233340630	CMS
AstraZeneca Pharmaceuticals LP	$25.63	10/08/2025	Food and Beverage	No dispute reported	06/30/2026	1206180452	CMS
GlaxoSmithKline, LLC.	$31.59	10/07/2025	Food and Beverage	No dispute reported	06/30/2026	1191686236	CMS
Amgen Inc.	$28.95	09/24/2025	Food and Beverage	No dispute reported	06/30/2026	1228301978	CMS
AstraZeneca Pharmaceuticals LP	$24.73	09/17/2025	Food and Beverage	No dispute reported	06/30/2026	1206985998	CMS
Novartis Pharmaceuticals Corporation	$15.78	09/16/2025	Food and Beverage	No dispute reported	06/30/2026	1200642341	CMS
ALK-Abello, Inc	$15.91	09/15/2025	Food and Beverage	No dispute reported	06/30/2026	1222417292	CMS
AstraZeneca Pharmaceuticals LP	$31.66	09/09/2025	Food and Beverage	No dispute reported	06/30/2026	1206544245	CMS
Regeneron Healthcare Solutions, Inc.	$37.00	09/05/2025	Food and Beverage	No dispute reported	06/30/2026	1212975201	CMS
GlaxoSmithKline, LLC.	$33.67	09/03/2025	Food and Beverage	No dispute reported	06/30/2026	1190656394	CMS
Amgen Inc.	$27.40	08/28/2025	Food and Beverage	No dispute reported	06/30/2026	1228301976	CMS
GENZYME CORPORATION	$13.77	08/27/2025	Food and Beverage	No dispute reported	06/30/2026	1233340628	CMS
Greer Laboratories, Inc.	$17.52	08/19/2025	Food and Beverage	No dispute reported	06/30/2026	1240086019	CMS
GlaxoSmithKline, LLC.	$25.85	08/14/2025	Food and Beverage	No dispute reported	06/30/2026	1191766696	CMS
PFIZER INC.	$15.27	08/04/2025	Education	No dispute reported	06/30/2026	1228807639	CMS
AstraZeneca Pharmaceuticals LP	$36.65	07/24/2025	Food and Beverage	No dispute reported	06/30/2026	1207263413	CMS
GENZYME CORPORATION	$8.29	07/22/2025	Food and Beverage	No dispute reported	06/30/2026	1233340620	CMS
AstraZeneca Pharmaceuticals LP	$35.00	07/21/2025	Food and Beverage	No dispute reported	06/30/2026	1207050491	CMS
AstraZeneca Pharmaceuticals LP	$23.61	07/18/2025	Food and Beverage	No dispute reported	06/30/2026	1206550162	CMS
Amgen Inc.	$28.45	07/16/2025	Food and Beverage	No dispute reported	06/30/2026	1228301972	CMS
AstraZeneca Pharmaceuticals LP	$20.26	07/15/2025	Food and Beverage	No dispute reported	06/30/2026	1206403061	CMS
Regeneron Healthcare Solutions, Inc.	$38.94	07/11/2025	Food and Beverage	No dispute reported	06/30/2026	1212975199	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$27.83	07/09/2025	Food and Beverage	No dispute reported	06/30/2026	1223911964	CMS
Genentech USA, Inc.	$16.29	07/03/2025	Food and Beverage	No dispute reported	06/30/2026	1211531048	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$28.88	07/03/2025	Food and Beverage	No dispute reported	06/30/2026	1223916381	CMS
Lilly USA, LLC	$31.28	06/23/2025	Food and Beverage	No dispute reported	06/30/2026	1186706409	CMS
Amgen Inc.	$12.86	06/16/2025	Food and Beverage	No dispute reported	06/30/2026	1227129421	CMS
Novartis Pharmaceuticals Corporation	$14.06	06/12/2025	Food and Beverage	No dispute reported	06/30/2026	1200642339	CMS
AstraZeneca Pharmaceuticals LP	$29.69	06/11/2025	Food and Beverage	No dispute reported	06/30/2026	1206609968	CMS
AstraZeneca Pharmaceuticals LP	$28.30	06/10/2025	Food and Beverage	No dispute reported	06/30/2026	1206374487	CMS
GENZYME CORPORATION	$36.39	05/29/2025	Food and Beverage	No dispute reported	06/30/2026	1233340602	CMS
AstraZeneca Pharmaceuticals LP	$24.47	05/21/2025	Food and Beverage	No dispute reported	06/30/2026	1206893138	CMS
Exelixis Inc.	$31.09	05/20/2025	Food and Beverage	No dispute reported	06/30/2026	1218797305	CMS
Amgen Inc.	$28.28	05/15/2025	Food and Beverage	No dispute reported	06/30/2026	1228301980	CMS
AstraZeneca Pharmaceuticals LP	$52.97	05/14/2025	Food and Beverage	No dispute reported	06/30/2026	1206343192	CMS
Genentech USA, Inc.	$28.73	05/14/2025	Food and Beverage	No dispute reported	06/30/2026	1211531046	CMS
AstraZeneca Pharmaceuticals LP	$26.32	05/09/2025	Food and Beverage	No dispute reported	06/30/2026	1206589162	CMS
AstraZeneca Pharmaceuticals LP	$33.29	05/05/2025	Food and Beverage	No dispute reported	06/30/2026	1206935259	CMS
GENZYME CORPORATION	$15.52	05/01/2025	Food and Beverage	No dispute reported	06/30/2026	1233340588	CMS
Optinose US, Inc.	$26.76	04/29/2025	Food and Beverage	No dispute reported	06/30/2026	1163255882	CMS
GENZYME CORPORATION	$14.02	04/21/2025	Food and Beverage	No dispute reported	06/30/2026	1233340576	CMS
Regeneron Healthcare Solutions, Inc.	$33.36	04/18/2025	Food and Beverage	No dispute reported	06/30/2026	1212975197	CMS
AstraZeneca Pharmaceuticals LP	$32.68	04/17/2025	Food and Beverage	No dispute reported	06/30/2026	1206470303	CMS
ARS Pharmaceuticals Operations, Inc.	$27.40	04/15/2025	Food and Beverage	No dispute reported	06/30/2026	1245882415	CMS
AstraZeneca Pharmaceuticals LP	$22.53	04/10/2025	Food and Beverage	No dispute reported	06/30/2026	1207277227	CMS
Greer Laboratories, Inc.	$19.37	04/08/2025	Food and Beverage	No dispute reported	06/30/2026	1240086017	CMS
Amgen Inc.	$11.92	03/25/2025	Food and Beverage	No dispute reported	06/30/2026	1227129419	CMS
Genentech USA, Inc.	$14.14	03/24/2025	Food and Beverage	No dispute reported	06/30/2026	1211531044	CMS
Regeneron Healthcare Solutions, Inc.	$32.95	03/20/2025	Food and Beverage	No dispute reported	06/30/2026	1212975195	CMS
Lilly USA, LLC	$34.61	03/17/2025	Food and Beverage	No dispute reported	06/30/2026	1186728175	CMS
AstraZeneca Pharmaceuticals LP	$18.94	03/07/2025	Food and Beverage	No dispute reported	06/30/2026	1206198740	CMS
GENZYME CORPORATION	$32.19	03/06/2025	Food and Beverage	No dispute reported	06/30/2026	1233340558	CMS
AstraZeneca Pharmaceuticals LP	$24.06	03/05/2025	Food and Beverage	No dispute reported	06/30/2026	1206723506	CMS
AstraZeneca Pharmaceuticals LP	$25.67	02/27/2025	Food and Beverage	No dispute reported	06/30/2026	1206610196	CMS
Lilly USA, LLC	$30.16	02/26/2025	Food and Beverage	No dispute reported	06/30/2026	1186726575	CMS
Organon LLC	$22.17	02/25/2025	Food and Beverage	No dispute reported	06/30/2026	1237706392	CMS
Regeneron Healthcare Solutions, Inc.	$32.47	02/19/2025	Food and Beverage	No dispute reported	06/30/2026	1212975193	CMS
BioCryst US Sales Co., LLC	$51.57	02/14/2025	Food and Beverage	No dispute reported	06/30/2026	1222005194	CMS
AstraZeneca Pharmaceuticals LP	$20.80	02/13/2025	Food and Beverage	No dispute reported	06/30/2026	1207269378	CMS
PFIZER INC.	$17.78	02/10/2025	Food and Beverage	No dispute reported	06/30/2026	1231643125	CMS
Amgen Inc.	$28.69	02/04/2025	Food and Beverage	No dispute reported	06/30/2026	1228301982	CMS
Lilly USA, LLC	$20.72	02/03/2025	Food and Beverage	No dispute reported	06/30/2026	1186742047	CMS
ALK-Abello, Inc	$14.38	01/29/2025	Food and Beverage	No dispute reported	06/30/2026	1222417290	CMS
AstraZeneca Pharmaceuticals LP	$25.43	01/28/2025	Food and Beverage	No dispute reported	06/30/2026	1206483337	CMS
Regeneron Healthcare Solutions, Inc.	$29.27	01/28/2025	Food and Beverage	No dispute reported	06/30/2026	1212975191	CMS
Lilly USA, LLC	$17.76	01/24/2025	Food and Beverage	No dispute reported	06/30/2026	1186728173	CMS
AstraZeneca Pharmaceuticals LP	$16.28	01/23/2025	Food and Beverage	No dispute reported	06/30/2026	1206332454	CMS
AstraZeneca Pharmaceuticals LP	$14.38	01/23/2025	Food and Beverage	No dispute reported	06/30/2026	1206374988	CMS
Greer Laboratories, Inc.	$24.66	01/23/2025	Food and Beverage	No dispute reported	06/30/2026	1240086015	CMS
GENZYME CORPORATION	$29.59	01/16/2025	Food and Beverage	No dispute reported	06/30/2026	1233340540	CMS
AstraZeneca Pharmaceuticals LP	$32.50	01/09/2025	Food and Beverage	No dispute reported	06/30/2026	1206217318	CMS

Source & provenance

Dataset: CMS Open Payments — General Payments
Publisher of source data: Centers for Medicare & Medicaid Services
CMS publication date: 2026-06-30
Program years on this page: 2019, 2020, 2021, 2022, 2023, 2024, 2025
Source files: Dataset page · Bulk file · PY2019 , PY2020 , PY2021 , PY2022 , PY2023 , PY2024 , PY2025
Generated from: OP_DTL_GNRL_PGYR2025_P06302026_06032026.csv

One page per canonical provider; split Profile_IDs are merged via Associated_Covered_Recipient_Profile_ID_1/_2 from the Covered Recipient Profile Supplement.

Corrections to the substance of a record route to CMS through its review-and-dispute process; errors in how this site mirrors or displays a record route to us. Both paths are described in Methodology & Data.

Cite this record.

Permalink https://industrypayments.org/provider/npi-1396823092

Plain: KENNETH WEITUNG LIEN, NPI 1396823092. IndustryPayments, data edition 2026-07-26T04:22:22Z. https://industrypayments.org/provider/npi-1396823092.
APA 7: IndustryPayments. (2026). KENNETH WEITUNG LIEN, NPI 1396823092 (Data edition 2026-07-26T04:22:22Z) [Data set]. https://industrypayments.org/provider/npi-1396823092
Bluebook: KENNETH WEITUNG LIEN, NPI 1396823092, IndustryPayments (data edition 2026-07-26T04:22:22Z), https://industrypayments.org/provider/npi-1396823092.

Source: Centers for Medicare & Medicaid Services, Open Payments.