GREGORY N GAN
Allopathic & Osteopathic Physicians|Radiology|Radiation Oncology KANSAS CITY, KS NPI 1568698561
Browse related groups: Allopathic & Osteopathic Physicians|Radiology|Radiation Oncology KS Acerta Pharma LLC All categories
General Payments — all program years on this page
$4,570.72
- Category: General Payments
- Program years: PY2018–2023
- Record count: 13
- As of (CMS publication): 2026-01-23
Latest program year (PY2023): $645.16 across 7 records · disputed records: 0
Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.
How this figure is 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
Latest program year (PY2023) · sorted by reported total.
| Nature of payment | Amount | Records |
|---|---|---|
| Food and Beverage | $645.16 | 7 |
By paying entity
Latest program year (PY2023) · sorted by reported total.
| Paying entity | Amount | Records |
|---|---|---|
| Acerta Pharma LLC | $281.04 | 3 |
| IBA Proton Therapy, Inc. | $169.00 | 1 |
| Regeneron Healthcare Solutions, Inc. | $121.51 | 1 |
| EMD Serono, Inc. | $40.94 | 1 |
| Genentech, Inc. | $32.67 | 1 |
By program year
Records — PY2023 (7)
| Record ID | Paying entity | Amount | Date | Nature of payment | Dispute status | Published | Source |
|---|---|---|---|---|---|---|---|
| 1011795799 | AstraZeneca Pharmaceuticals LP | $75.43 | 06/04/2023 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 1011911443 | AstraZeneca Pharmaceuticals LP | $73.08 | 06/04/2023 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 1016271165 | AstraZeneca Pharmaceuticals LP | $132.53 | 02/08/2023 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 1032542461 | EMD Serono, Inc. | $40.94 | 06/04/2023 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 1040372143 | Genentech, Inc. | $32.67 | 04/17/2023 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 1047986491 | IBA Proton Therapy, Inc. | $169.00 | 10/01/2023 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 999180723 | Regeneron Healthcare Solutions, Inc. | $121.51 | 02/03/2023 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
Provenance & corrections
- Dataset: CMS Open Payments — General Payments
- Source: CMS Open Payments dataset (bulk file)
- Publisher of source data: Centers for Medicare & Medicaid Services
- Generated from: OP_DTL_GNRL_PGYR2023_P01232026_01102026.csv
One page per canonical provider; split Profile_IDs are merged via Associated_Covered_Recipient_Profile_ID_1/_2 from the Covered Recipient Profile Supplement.
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.