GREGORY SCHLESSINGER
Allopathic & Osteopathic Physicians|Internal Medicine|Nephrology LONE TREE, CO NPI 1255313441
Browse related groups: Allopathic & Osteopathic Physicians|Internal Medicine|Nephrology CO Amgen Inc. All categories
General Payments — all program years on this page
$3,201.16
- Category: General Payments
- Program years: PY2018–2024
- Record count: 66
- As of (CMS publication): 2026-01-23
Latest program year (PY2024): $515.08 across 17 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 (PY2024) · sorted by reported total.
| Nature of payment | Amount | Records |
|---|---|---|
| Food and Beverage | $498.19 | 16 |
| Education | $16.89 | 1 |
By paying entity
Latest program year (PY2024) · sorted by reported total.
| Paying entity | Amount | Records |
|---|---|---|
| Amgen Inc. | $132.78 | 5 |
| AKEBIA THERAPEUTICS INC | $125.00 | 1 |
| Otsuka America Pharmaceutical, Inc. | $57.88 | 2 |
| Relypsa, Inc. | $44.07 | 2 |
| Daiichi Sankyo Inc. | $30.12 | 2 |
| Novo Nordisk AS | $30.10 | 1 |
| Alexion Pharmaceuticals, Inc. | $27.68 | 1 |
| Acerta Pharma LLC | $26.41 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $24.15 | 1 |
| Retrophin, Inc. | $16.89 | 1 |
By program year
Records — PY2024 (17)
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_PGYR2024_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.