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

KOEN NIEMAN

Allopathic & Osteopathic Physicians Internal Medicine Cardiovascular Disease

NPI
1144778143
CMS profile
3198356
Location
STANFORD, CA

General Payments · PY2018–2024

$46,373.25

  • Reported across 27 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$5,010.69

7 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

By paying entity

PY2024 · sorted by reported total

Paying entityAmountRecords
NOVARTIS PHARMACEUTICALS CORPORATION $4,640.05 2
Cleerly, Inc. $195.72 2
Siemens Medical Solutions USA, Inc. $150.49 2
HEARTFLOW, INC. $24.43 1

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $303.56 2
PY2019 $139.67 2
PY2020 $2,000.00 1
PY2021 $176.98 2
PY2022 $159.92 2
PY2023 $38,582.43 11
PY2024 $5,010.69 7

Payment records · PY2024 (7)

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
Cleerly, Inc. $165.61 07/10/2024 Food and Beverage Undisputed 01/23/2026 1144710451 CMS
Cleerly, Inc. $30.11 07/22/2024 Food and Beverage Undisputed 01/23/2026 1144710475 CMS
HEARTFLOW, INC. $24.43 05/28/2024 Food and Beverage Undisputed 01/23/2026 1154166166 CMS
Novartis Pharmaceuticals Corporation $4,550.00 01/16/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1086963872 CMS
Novartis Pharmaceuticals Corporation $90.05 02/13/2024 Food and Beverage Undisputed 01/23/2026 1086963870 CMS
Siemens Medical Solutions USA, Inc. $118.01 02/22/2024 Food and Beverage Undisputed 01/23/2026 1093692074 CMS
Siemens Medical Solutions USA, Inc. $32.48 07/19/2024 Food and Beverage Undisputed 01/23/2026 1093692076 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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