Official source Data mirrored from Centers for Medicare & Medicaid Services Open Payments · General Payments · as published 2026-06-30 View official record Methodology

Covered recipient · General Payments record

ERIC W CHAK

Allopathic & Osteopathic Physicians Internal Medicine Gastroenterology

NPI
1225271331
CMS profile
1395900
Location
DAVIS, CA

General Payments · PY2019–2025

$1,630.80

  • Reported across 19 records
  • CMS publication 2026-06-30

Latest program year · PY2025

$351.63

15 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

PY2025 · sorted by reported total

Nature of paymentAmountRecords
Food and Beverage $351.63 15

By paying entity

PY2025 · sorted by reported total

Paying entityAmountRecords
Janssen Biotech, Inc. $113.18 5
Madrigal Pharmaceuticals $87.54 3
ABBVIE INC. $75.66 3
Gilead Sciences, Inc. $20.35 1
Takeda Pharmaceuticals U.S.A., Inc. $20.33 1
Ardelyx, Inc. $17.60 1
Celltrion USA Inc. $16.97 1

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2019 $1,239.98 2
PY2020 $19.44 1
PY2024 $19.75 1
PY2025 $351.63 15

Payment records · PY2025 (15)

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

Program year 2025 201920202024 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
ABBVIE INC. $21.70 04/16/2025 Food and Beverage Undisputed 06/30/2026 1201625772 CMS
ABBVIE INC. $21.63 11/06/2025 Food and Beverage Undisputed 06/30/2026 1201625774 CMS
ABBVIE INC. $32.33 11/11/2025 Food and Beverage Undisputed 06/30/2026 1201625776 CMS
Ardelyx, Inc. $17.60 06/04/2025 Food and Beverage Undisputed 06/30/2026 1247839554 CMS
Celltrion USA Inc. $16.97 05/16/2025 Food and Beverage Undisputed 06/30/2026 1250819685 CMS
Gilead Sciences, Inc. $20.35 02/25/2025 Food and Beverage Undisputed 06/30/2026 1234524673 CMS
Janssen Biotech, Inc. $22.50 01/16/2025 Food and Beverage Undisputed 06/30/2026 1174587770 CMS
Janssen Biotech, Inc. $14.52 01/23/2025 Food and Beverage Undisputed 06/30/2026 1174587711 CMS
Janssen Biotech, Inc. $18.86 04/04/2025 Food and Beverage Undisputed 06/30/2026 1174587762 CMS
Janssen Biotech, Inc. $19.04 05/28/2025 Food and Beverage Undisputed 06/30/2026 1174587752 CMS
Janssen Biotech, Inc. $38.26 08/21/2025 Food and Beverage Undisputed 06/30/2026 1174587686 CMS
Madrigal Pharmaceuticals $20.58 01/15/2025 Food and Beverage Undisputed 06/30/2026 1248244064 CMS
Madrigal Pharmaceuticals $20.94 02/18/2025 Food and Beverage Undisputed 06/30/2026 1248244068 CMS
Madrigal Pharmaceuticals $46.02 04/15/2025 Food and Beverage Undisputed 06/30/2026 1248244072 CMS
Takeda Pharmaceuticals U.S.A., Inc. $20.33 12/03/2025 Food and Beverage Undisputed 06/30/2026 1223860184 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, 2024, 2025
Source files
Dataset page · Bulk file · PY2019 , PY2020 , 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.