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

GREGGORY MICHAEL GAHN

Allopathic & Osteopathic Physicians Ophthalmology Retina Specialist

NPI
1720541147
CMS profile
7020834
Location
RENO, NV

General Payments · PY2020–2024

$7,225.04

  • Reported across 100 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$855.61

27 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
Food and Beverage $855.61 27

By paying entity

PY2024 · sorted by reported total

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2020 $145.51 4
PY2021 $278.39 5
PY2022 $3,267.29 38
PY2023 $2,678.24 26
PY2024 $855.61 27

Payment records · PY2024 (27)

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

Program year 2024 2020202120222023 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
Alimera Sciences, Inc. $19.38 06/27/2024 Food and Beverage Undisputed 01/23/2026 1092840194 CMS
ANI Pharmaceuticals, Inc. $16.68 12/04/2024 Food and Beverage Undisputed 01/23/2026 1091163578 CMS
Astellas Pharma Global Development $23.29 08/15/2024 Food and Beverage Undisputed 01/23/2026 1132965959 CMS
Astellas Pharma US Inc $28.88 04/12/2024 Food and Beverage Undisputed 01/23/2026 1139327024 CMS
Astellas Pharma US Inc $20.80 04/24/2024 Food and Beverage Undisputed 01/23/2026 1139332374 CMS
Astellas Pharma US Inc $1.51 05/03/2024 Food and Beverage Undisputed 01/23/2026 1139332482 CMS
Astellas Pharma US Inc $109.98 05/14/2024 Food and Beverage Undisputed 01/23/2026 1139414725 CMS
Astellas Pharma US Inc $27.95 06/05/2024 Food and Beverage Undisputed 01/23/2026 1139358485 CMS
Astellas Pharma US Inc $30.00 07/16/2024 Food and Beverage Undisputed 01/23/2026 1139283278 CMS
Astellas Pharma US Inc $9.59 10/15/2024 Food and Beverage Undisputed 01/23/2026 1139421211 CMS
Astellas Pharma US Inc $16.63 10/17/2024 Food and Beverage Undisputed 01/23/2026 1139405477 CMS
Astellas Pharma US Inc $29.51 12/03/2024 Food and Beverage Undisputed 01/23/2026 1139444624 CMS
Bausch & Lomb Americas Inc. $20.94 01/03/2024 Food and Beverage Undisputed 01/23/2026 1140349248 CMS
Genentech USA, Inc. $30.56 02/21/2024 Food and Beverage Undisputed 01/23/2026 1133016271 CMS
Genentech USA, Inc. $0.29 04/23/2024 Food and Beverage Undisputed 01/23/2026 1133016263 CMS
Genentech USA, Inc. $24.99 04/23/2024 Food and Beverage Undisputed 01/23/2026 1133016267 CMS
Genentech USA, Inc. $115.84 06/06/2024 Food and Beverage Undisputed 01/23/2026 1133016291 CMS
Genentech USA, Inc. $21.42 07/10/2024 Food and Beverage Undisputed 01/23/2026 1133016259 CMS
Genentech USA, Inc. $15.04 08/01/2024 Food and Beverage Undisputed 01/23/2026 1133016275 CMS
Genentech USA, Inc. $27.99 08/20/2024 Food and Beverage Undisputed 01/23/2026 1133016251 CMS
Genentech USA, Inc. $22.17 09/24/2024 Food and Beverage Undisputed 01/23/2026 1133016279 CMS
Genentech USA, Inc. $28.31 11/04/2024 Food and Beverage Undisputed 01/23/2026 1133016255 CMS
Genentech USA, Inc. $6.65 11/14/2024 Food and Beverage Undisputed 01/23/2026 1133016287 CMS
Genentech USA, Inc. $23.67 12/10/2024 Food and Beverage Undisputed 01/23/2026 1133016283 CMS
Harrow Eye, LLC $32.53 11/05/2024 Food and Beverage Undisputed 01/23/2026 1145603260 CMS
Ocular Therapeutix, Inc. $18.11 05/23/2024 Food and Beverage Undisputed 01/23/2026 1148198847 CMS
Ocular Therapeutix, Inc. $132.90 05/23/2024 Food and Beverage Undisputed 01/23/2026 1148198849 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, 2022, 2023, 2024
Source files
Dataset page · Bulk file · PY2020 , PY2021 , PY2022 , PY2023 , PY2024
Generated from
OP_DTL_GNRL_PGYR2024_P01232026_01102026.csv

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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.