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

NIZAR CHAHIN

Allopathic & Osteopathic Physicians Psychiatry & Neurology Neurology

NPI
1225015761
CMS profile
881756
Location
PORTLAND, OR

General Payments · PY2018–2024

$67,758.50

  • Reported across 82 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$14,537.32

21 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
Consulting Fee $9,562.50 3
Travel and Lodging $4,005.56 5
Food and Beverage $969.26 13

By paying entity

PY2024 · sorted by reported total

Paying entityAmountRecords
ARGENX US, INC. $7,330.20 14
Amicus Therapeutics, Inc. $4,928.22 5
Janssen Scientific Affairs, LLC $2,187.50 1
Sarepta Therapeutics, Inc. $91.40 1

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $17,841.76 24
PY2019 $5,166.10 7
PY2020 $11.26 1
PY2021 $90.83 1
PY2022 $17,557.23 14
PY2023 $12,554.00 14
PY2024 $14,537.32 21

Payment records · PY2024 (21)

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
Amicus Therapeutics, Inc. $81.09 02/23/2024 Food and Beverage Undisputed 01/23/2026 1148420488 CMS
Amicus Therapeutics, Inc. $87.00 09/26/2024 Food and Beverage Undisputed 01/23/2026 1148420577 CMS
Amicus Therapeutics, Inc. $98.50 10/14/2024 Food and Beverage Undisputed 01/23/2026 1148420717 CMS
Amicus Therapeutics, Inc. $1,661.63 12/11/2024 Travel and Lodging Undisputed 01/23/2026 1148420651 CMS
Amicus Therapeutics, Inc. $3,000.00 12/11/2024 Consulting Fee Undisputed 01/23/2026 1148420715 CMS
ARGENX US, INC. $95.00 05/28/2024 Food and Beverage Undisputed 01/23/2026 1142107183 CMS
ARGENX US, INC. $1,659.90 06/19/2024 Travel and Lodging Undisputed 01/23/2026 1142114749 CMS
ARGENX US, INC. $50.00 06/21/2024 Food and Beverage Undisputed 01/23/2026 1142114697 CMS
ARGENX US, INC. $17.79 06/21/2024 Food and Beverage Undisputed 01/23/2026 1142114713 CMS
ARGENX US, INC. $299.91 06/21/2024 Travel and Lodging Undisputed 01/23/2026 1142115023 CMS
ARGENX US, INC. $243.75 06/21/2024 Travel and Lodging Undisputed 01/23/2026 1142115063 CMS
ARGENX US, INC. $75.00 06/21/2024 Food and Beverage Undisputed 01/23/2026 1142115119 CMS
ARGENX US, INC. $82.96 07/18/2024 Food and Beverage Undisputed 01/23/2026 1142114639 CMS
ARGENX US, INC. $140.37 07/18/2024 Travel and Lodging Undisputed 01/23/2026 1142114645 CMS
ARGENX US, INC. $4,375.00 07/18/2024 Consulting Fee Undisputed 01/23/2026 1142115049 CMS
ARGENX US, INC. $84.13 09/03/2024 Food and Beverage Undisputed 01/23/2026 1142110787 CMS
ARGENX US, INC. $83.33 09/11/2024 Food and Beverage Undisputed 01/23/2026 1142118387 CMS
ARGENX US, INC. $60.94 09/16/2024 Food and Beverage Undisputed 01/23/2026 1142122969 CMS
ARGENX US, INC. $62.12 10/24/2024 Food and Beverage Undisputed 01/23/2026 1142119753 CMS
Janssen Scientific Affairs, LLC $2,187.50 10/23/2024 Consulting Fee Undisputed 01/23/2026 1078857256 CMS
Sarepta Therapeutics, Inc. $91.40 04/30/2024 Food and Beverage Undisputed 01/23/2026 1126541221 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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