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 DEMAR

Allopathic & Osteopathic Physicians Surgery

NPI
1821050253
CMS profile
218296
Location
CARSON CITY, NV

General Payments · PY2020–2023

$16,275.63

  • Reported across 49 records
  • CMS publication 2026-01-23

Latest program year · PY2023

$1,180.92

11 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

PY2023 · sorted by reported total

Nature of paymentAmountRecords
Travel and Lodging $1,002.39 4
Food and Beverage $178.53 7

By paying entity

PY2023 · sorted by reported total

Paying entityAmountRecords
INTUITIVE SURGICAL, INC. $1,167.61 10
DAVOL INC. $13.31 1

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2020 $12,264.55 25
PY2021 $2,830.16 13
PY2023 $1,180.92 11

Payment records · PY2023 (11)

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

Program year 2023 20202021 Record-level detail is published for PY2023; earlier years are summarised in “By program year”.
Paying entity Amount Date Nature of payment Dispute status Published Record ID Source
Davol Inc. $13.31 03/17/2023 Food and Beverage Undisputed 01/23/2026 1023938759 CMS
Intuitive Surgical, Inc. $4.97 05/02/2023 Food and Beverage Undisputed 01/23/2026 1055527717 CMS
Intuitive Surgical, Inc. $6.45 07/18/2023 Food and Beverage Undisputed 01/23/2026 1055823215 CMS
Intuitive Surgical, Inc. $8.56 08/08/2023 Food and Beverage Undisputed 01/23/2026 1055456819 CMS
Intuitive Surgical, Inc. $4.52 08/08/2023 Food and Beverage Undisputed 01/23/2026 1055501891 CMS
Intuitive Surgical, Inc. $656.18 08/18/2023 Travel and Lodging Undisputed 01/23/2026 1055887601 CMS
Intuitive Surgical, Inc. $19.00 08/18/2023 Travel and Lodging Undisputed 01/23/2026 1055971104 CMS
Intuitive Surgical, Inc. $210.69 08/22/2023 Travel and Lodging Undisputed 01/23/2026 1055456265 CMS
Intuitive Surgical, Inc. $5.42 09/26/2023 Food and Beverage Undisputed 01/23/2026 1055787289 CMS
Intuitive Surgical, Inc. $116.52 09/27/2023 Travel and Lodging Undisputed 01/23/2026 1055456377 CMS
Intuitive Surgical, Inc. $135.30 09/27/2023 Food and Beverage Undisputed 01/23/2026 1055899023 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
2020, 2021, 2023
Source files
Dataset page · Bulk file · PY2020 , PY2021 , PY2023
Generated from
OP_DTL_GNRL_PGYR2023_P01232026_01102026.csv

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