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

NANG LOK TSANG

Allopathic & Osteopathic Physicians Internal Medicine

NPI
1992873723
CMS profile
533972
Location
SAN FRANCISCO, CA

General Payments · PY2018–2024

$6,764.33

  • Reported across 268 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$1,020.81

38 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 $1,020.81 38

By paying entity

PY2024 · sorted by reported total

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $1,019.25 39
PY2019 $1,658.28 57
PY2020 $806.49 35
PY2021 $764.00 34
PY2022 $624.36 28
PY2023 $871.14 37
PY2024 $1,020.81 38

Payment records · PY2024 (38)

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
ABBVIE INC. $22.13 08/09/2024 Food and Beverage Undisputed 01/23/2026 1106248909 CMS
AstraZeneca Pharmaceuticals LP $125.00 01/26/2024 Food and Beverage Undisputed 01/23/2026 1105726593 CMS
AstraZeneca Pharmaceuticals LP $21.73 02/02/2024 Food and Beverage Undisputed 01/23/2026 1104374723 CMS
AstraZeneca Pharmaceuticals LP $16.85 08/16/2024 Food and Beverage Undisputed 01/23/2026 1105815049 CMS
AstraZeneca Pharmaceuticals LP $17.66 11/08/2024 Food and Beverage Undisputed 01/23/2026 1105602528 CMS
AstraZeneca Pharmaceuticals LP $22.54 12/06/2024 Food and Beverage Undisputed 01/23/2026 1104743709 CMS
AstraZeneca Pharmaceuticals LP $21.17 12/18/2024 Food and Beverage Undisputed 01/23/2026 1104200761 CMS
Bayer Healthcare Pharmaceuticals Inc. $27.10 03/16/2024 Food and Beverage Undisputed 01/23/2026 1086113986 CMS
Bayer Healthcare Pharmaceuticals Inc. $23.84 06/01/2024 Food and Beverage Undisputed 01/23/2026 1086167832 CMS
Bayer Healthcare Pharmaceuticals Inc. $30.37 08/24/2024 Food and Beverage Undisputed 01/23/2026 1086193966 CMS
Bayer Healthcare Pharmaceuticals Inc. $31.15 11/22/2024 Food and Beverage Undisputed 01/23/2026 1086213427 CMS
E.R. Squibb & Sons, L.L.C. $15.09 02/28/2024 Food and Beverage Undisputed 01/23/2026 1101302683 CMS
GlaxoSmithKline, LLC. $29.64 11/01/2024 Food and Beverage Undisputed 01/23/2026 1116357850 CMS
Janssen Pharmaceuticals, Inc $30.90 07/12/2024 Food and Beverage Undisputed 01/23/2026 1077939992 CMS
Kowa Pharmaceuticals America, Inc. $21.11 12/13/2024 Food and Beverage Undisputed 01/23/2026 1113471193 CMS
Lilly USA, LLC $29.36 01/20/2024 Food and Beverage Undisputed 01/23/2026 1135218711 CMS
Lilly USA, LLC $34.33 02/15/2024 Food and Beverage Undisputed 01/23/2026 1135280055 CMS
Lilly USA, LLC $29.79 04/20/2024 Food and Beverage Undisputed 01/23/2026 1135235981 CMS
Lilly USA, LLC $31.23 05/17/2024 Food and Beverage Undisputed 01/23/2026 1135263861 CMS
Lilly USA, LLC $28.36 07/26/2024 Food and Beverage Undisputed 01/23/2026 1135175575 CMS
Merck Sharp & Dohme LLC $14.21 02/23/2024 Food and Beverage Undisputed 01/23/2026 1141601103 CMS
Merck Sharp & Dohme LLC $13.46 05/10/2024 Food and Beverage Undisputed 01/23/2026 1141601105 CMS
Merck Sharp & Dohme LLC $26.94 08/30/2024 Food and Beverage Undisputed 01/23/2026 1141838957 CMS
Merck Sharp & Dohme LLC $13.46 10/25/2024 Food and Beverage Undisputed 01/23/2026 1141838959 CMS
Novartis Pharmaceuticals Corporation $26.06 03/01/2024 Food and Beverage Undisputed 01/23/2026 1087422438 CMS
Novartis Pharmaceuticals Corporation $20.55 06/14/2024 Food and Beverage Undisputed 01/23/2026 1087422444 CMS
Novo Nordisk Inc $23.49 01/12/2024 Food and Beverage Undisputed 01/23/2026 1096927718 CMS
Novo Nordisk Inc $23.92 03/08/2024 Food and Beverage Undisputed 01/23/2026 1096931090 CMS
Novo Nordisk Inc $22.31 04/05/2024 Food and Beverage Undisputed 01/23/2026 1097278157 CMS
Novo Nordisk Inc $23.44 04/12/2024 Food and Beverage Undisputed 01/23/2026 1097047540 CMS
Novo Nordisk Inc $23.64 05/24/2024 Food and Beverage Undisputed 01/23/2026 1097429008 CMS
Novo Nordisk Inc $22.67 06/08/2024 Food and Beverage Undisputed 01/23/2026 1096652234 CMS
Novo Nordisk Inc $24.88 07/19/2024 Food and Beverage Undisputed 01/23/2026 1096619446 CMS
Novo Nordisk Inc $19.31 08/01/2024 Food and Beverage Undisputed 01/23/2026 1096614468 CMS
Novo Nordisk Inc $29.48 09/28/2024 Food and Beverage Undisputed 01/23/2026 1097041960 CMS
PFIZER INC. $24.41 03/22/2024 Food and Beverage Undisputed 01/23/2026 1132030439 CMS
PFIZER INC. $31.49 10/04/2024 Food and Beverage Undisputed 01/23/2026 1132130438 CMS
PFIZER INC. $27.74 12/19/2024 Food and Beverage Undisputed 01/23/2026 1131488527 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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