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

MICHAEL A MATTHAY

Allopathic & Osteopathic Physicians Internal Medicine

NPI
1891734497
CMS profile
901012
Location
SAN FRANCISCO, CA

General Payments · PY2018–2024

$63,828.49

  • Reported across 30 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$33,136.75

17 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 $16,940.00 2
Travel and Lodging $15,777.02 7
Food and Beverage $419.73 8

By paying entity

PY2024 · sorted by reported total

Paying entityAmountRecords
CSL Behring $25,395.51 8
Merck Sharp & Dohme Corporation $7,741.24 9

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $3,570.00 1
PY2019 $1,050.00 1
PY2020 $9,664.00 2
PY2021 $4,900.00 3
PY2022 $3,355.79 3
PY2023 $8,151.95 3
PY2024 $33,136.75 17

Payment records · PY2024 (17)

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
CSL Behring $64.90 02/29/2024 Food and Beverage Undisputed 01/23/2026 1134662749 CMS
CSL Behring $128.73 02/29/2024 Travel and Lodging Undisputed 01/23/2026 1134662751 CMS
CSL Behring $65.02 03/01/2024 Food and Beverage Undisputed 01/23/2026 1134662753 CMS
CSL Behring $27.09 03/01/2024 Food and Beverage Undisputed 01/23/2026 1134662755 CMS
CSL Behring $16.25 03/01/2024 Food and Beverage Undisputed 01/23/2026 1134662757 CMS
CSL Behring $227.12 03/01/2024 Travel and Lodging Undisputed 01/23/2026 1134662759 CMS
CSL Behring $10,895.00 03/22/2024 Consulting Fee Undisputed 01/23/2026 1134662763 CMS
CSL Behring $13,971.40 03/22/2024 Travel and Lodging Undisputed 01/23/2026 1134662765 CMS
Merck Sharp & Dohme LLC $289.00 10/01/2024 Travel and Lodging Undisputed 01/23/2026 1141782903 CMS
Merck Sharp & Dohme LLC $721.77 10/01/2024 Travel and Lodging Undisputed 01/23/2026 1141782907 CMS
Merck Sharp & Dohme LLC $125.00 10/01/2024 Food and Beverage Undisputed 01/23/2026 1141782909 CMS
Merck Sharp & Dohme LLC $48.49 10/02/2024 Food and Beverage Undisputed 01/23/2026 1141782885 CMS
Merck Sharp & Dohme LLC $289.00 10/02/2024 Travel and Lodging Undisputed 01/23/2026 1141782887 CMS
Merck Sharp & Dohme LLC $46.04 10/02/2024 Food and Beverage Undisputed 01/23/2026 1141782889 CMS
Merck Sharp & Dohme LLC $26.94 10/02/2024 Food and Beverage Undisputed 01/23/2026 1141782905 CMS
Merck Sharp & Dohme LLC $150.00 10/14/2024 Travel and Lodging Undisputed 01/23/2026 1141588496 CMS
Merck Sharp & Dohme LLC $6,045.00 10/14/2024 Consulting Fee Undisputed 01/23/2026 1141588604 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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