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

MARK C TSAI

Allopathic & Osteopathic Physicians Internal Medicine

NPI
1225033111
CMS profile
55514
Location
PARAMOUNT, CA

General Payments · PY2018–2024

$13,738.58

  • Reported across 442 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$1,841.93

64 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 $1,751.93 63
Education $90.00 1

By paying entity

PY2024 · sorted by reported total

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $2,806.37 66
PY2019 $1,566.28 61
PY2020 $1,412.61 65
PY2021 $2,620.30 90
PY2022 $2,080.18 56
PY2023 $1,410.91 40
PY2024 $1,841.93 64

Payment records · PY2024 (64)

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. $119.99 05/23/2024 Food and Beverage Undisputed 01/23/2026 1106248533 CMS
ABBVIE INC. $8.14 08/05/2024 Food and Beverage Undisputed 01/23/2026 1106248535 CMS
ABBVIE INC. $25.24 08/20/2024 Food and Beverage Undisputed 01/23/2026 1106248537 CMS
ABBVIE INC. $4.74 10/28/2024 Food and Beverage Undisputed 01/23/2026 1106248539 CMS
Amgen Inc. $19.44 05/21/2024 Food and Beverage Undisputed 01/23/2026 1111728381 CMS
Amgen Inc. $25.35 08/06/2024 Food and Beverage Undisputed 01/23/2026 1111728383 CMS
Astellas Pharma US Inc $90.00 03/11/2024 Education Undisputed 01/23/2026 1139345414 CMS
AstraZeneca Pharmaceuticals LP $121.98 04/08/2024 Food and Beverage Undisputed 01/23/2026 1105719634 CMS
AstraZeneca Pharmaceuticals LP $26.29 04/13/2024 Food and Beverage Undisputed 01/23/2026 1104390229 CMS
AstraZeneca Pharmaceuticals LP $31.11 06/07/2024 Food and Beverage Undisputed 01/23/2026 1105636458 CMS
Bayer Healthcare Pharmaceuticals Inc. $25.18 02/15/2024 Food and Beverage Undisputed 01/23/2026 1086242256 CMS
Bayer Healthcare Pharmaceuticals Inc. $28.97 04/18/2024 Food and Beverage Undisputed 01/23/2026 1086168792 CMS
Bayer Healthcare Pharmaceuticals Inc. $30.94 06/25/2024 Food and Beverage Undisputed 01/23/2026 1086227924 CMS
Bayer Healthcare Pharmaceuticals Inc. $20.22 09/12/2024 Food and Beverage Undisputed 01/23/2026 1086132160 CMS
Bayer Healthcare Pharmaceuticals Inc. $24.13 10/29/2024 Food and Beverage Undisputed 01/23/2026 1086222450 CMS
Exact Sciences Corporation $21.84 01/12/2024 Food and Beverage Undisputed 01/23/2026 1114935818 CMS
Exact Sciences Corporation $18.64 07/16/2024 Food and Beverage Undisputed 01/23/2026 1114935822 CMS
Fresenius USA Marketing, Inc. $22.78 01/05/2024 Food and Beverage Undisputed 01/23/2026 1154212724 CMS
Lilly USA, LLC $8.86 02/27/2024 Food and Beverage Undisputed 01/23/2026 1135167836 CMS
Lilly USA, LLC $18.41 03/18/2024 Food and Beverage Undisputed 01/23/2026 1135152334 CMS
Lilly USA, LLC $33.14 03/21/2024 Food and Beverage Undisputed 01/23/2026 1135157787 CMS
Lilly USA, LLC $26.72 05/16/2024 Food and Beverage Undisputed 01/23/2026 1135152336 CMS
Lilly USA, LLC $11.24 07/10/2024 Food and Beverage Undisputed 01/23/2026 1135115427 CMS
Lilly USA, LLC $15.21 07/26/2024 Food and Beverage Undisputed 01/23/2026 1135168306 CMS
Lilly USA, LLC $9.05 08/13/2024 Food and Beverage Undisputed 01/23/2026 1135115429 CMS
Lilly USA, LLC $29.86 09/10/2024 Food and Beverage Undisputed 01/23/2026 1135162453 CMS
Lilly USA, LLC $14.37 10/15/2024 Food and Beverage Undisputed 01/23/2026 1135168308 CMS
Madrigal Pharmaceuticals $38.56 09/26/2024 Food and Beverage Undisputed 01/23/2026 1144184149 CMS
Madrigal Pharmaceuticals $44.76 10/17/2024 Food and Beverage Undisputed 01/23/2026 1144184151 CMS
Madrigal Pharmaceuticals $37.13 12/05/2024 Food and Beverage Undisputed 01/23/2026 1144184153 CMS
Mannkind Corporation $18.73 06/12/2024 Food and Beverage Undisputed 01/23/2026 1145850577 CMS
Mannkind Corporation $14.06 08/01/2024 Food and Beverage Undisputed 01/23/2026 1145850579 CMS
Mannkind Corporation $20.94 08/27/2024 Food and Beverage Undisputed 01/23/2026 1145850581 CMS
Mannkind Corporation $9.95 09/06/2024 Food and Beverage Undisputed 01/23/2026 1145850583 CMS
Mannkind Corporation $22.93 09/24/2024 Food and Beverage Undisputed 01/23/2026 1145850585 CMS
Mannkind Corporation $21.13 10/15/2024 Food and Beverage Undisputed 01/23/2026 1145850587 CMS
Mannkind Corporation $8.73 10/25/2024 Food and Beverage Undisputed 01/23/2026 1145850589 CMS
Mannkind Corporation $4.91 10/25/2024 Food and Beverage Undisputed 01/23/2026 1145850591 CMS
Mannkind Corporation $12.50 11/12/2024 Food and Beverage Undisputed 01/23/2026 1145850593 CMS
Mannkind Corporation $8.30 11/22/2024 Food and Beverage Undisputed 01/23/2026 1145850595 CMS
Mannkind Corporation $10.36 12/02/2024 Food and Beverage Undisputed 01/23/2026 1145850597 CMS
Merck Sharp & Dohme LLC $16.94 07/18/2024 Food and Beverage Undisputed 01/23/2026 1141706176 CMS
Novo Nordisk Inc $17.63 01/09/2024 Food and Beverage Undisputed 01/23/2026 1097539371 CMS
Novo Nordisk Inc $24.96 03/22/2024 Food and Beverage Undisputed 01/23/2026 1096753639 CMS
Novo Nordisk Inc $6.11 04/09/2024 Food and Beverage Undisputed 01/23/2026 1096922346 CMS
Novo Nordisk Inc $22.42 04/22/2024 Food and Beverage Undisputed 01/23/2026 1096577121 CMS
Novo Nordisk Inc $24.77 05/02/2024 Food and Beverage Undisputed 01/23/2026 1096567632 CMS
Novo Nordisk Inc $120.86 06/13/2024 Food and Beverage Undisputed 01/23/2026 1096912458 CMS
Novo Nordisk Inc $23.45 07/09/2024 Food and Beverage Undisputed 01/23/2026 1096588759 CMS
Novo Nordisk Inc $7.58 08/02/2024 Food and Beverage Undisputed 01/23/2026 1097315065 CMS
Novo Nordisk Inc $15.24 08/09/2024 Food and Beverage Undisputed 01/23/2026 1097585925 CMS
Novo Nordisk Inc $7.40 10/28/2024 Food and Beverage Undisputed 01/23/2026 1096987752 CMS
Novo Nordisk Inc $120.88 10/29/2024 Food and Beverage Undisputed 01/23/2026 1096584765 CMS
Novo Nordisk Inc $6.95 11/15/2024 Food and Beverage Undisputed 01/23/2026 1096832573 CMS
Paratek Pharmaceuticals, Inc. $21.28 01/30/2024 Food and Beverage Undisputed 01/23/2026 1113922120 CMS
Paratek Pharmaceuticals, Inc. $14.34 06/04/2024 Food and Beverage Undisputed 01/23/2026 1113922122 CMS
PFIZER INC. $18.36 07/31/2024 Food and Beverage Undisputed 01/23/2026 1132035634 CMS
Phathom Pharmaceuticals, Inc. $30.08 03/15/2024 Food and Beverage Undisputed 01/23/2026 1151134536 CMS
Phathom Pharmaceuticals, Inc. $30.08 04/30/2024 Food and Beverage Undisputed 01/23/2026 1151134538 CMS
Phathom Pharmaceuticals, Inc. $109.49 05/30/2024 Food and Beverage Undisputed 01/23/2026 1151134540 CMS
Phathom Pharmaceuticals, Inc. $25.97 08/30/2024 Food and Beverage Undisputed 01/23/2026 1151134542 CMS
Vanda Pharmaceuticals Inc. $26.64 01/16/2024 Food and Beverage Undisputed 01/23/2026 1133923728 CMS
Vanda Pharmaceuticals Inc. $15.88 02/15/2024 Food and Beverage Undisputed 01/23/2026 1133923732 CMS
Vanda Pharmaceuticals Inc. $29.79 08/13/2024 Food and Beverage Undisputed 01/23/2026 1133923736 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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