KEITH CHARLES KNAPP SR.
Allopathic & Osteopathic Physicians|General Practice CHICAGO, IL NPI 1295726412
Browse related groups: Allopathic & Osteopathic Physicians|General Practice IL Allergan Inc. All categories
General Payments — all program years on this page
$202.16
- Category: General Payments
- Program years: PY2018–2020
- Record count: 13
- As of (CMS publication): 2026-01-23
Latest program year (PY2020): $75.94 across 5 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 (PY2020) · sorted by reported total.
| Nature of payment | Amount | Records |
|---|---|---|
| Food and Beverage | $75.94 | 5 |
By paying entity
Latest program year (PY2020) · sorted by reported total.
| Paying entity | Amount | Records |
|---|---|---|
| Allergan Inc. | $30.23 | 2 |
| ABBVIE INC. | $18.00 | 1 |
| PFIZER INC. | $14.99 | 1 |
| Esperion Therapeutics, Inc. | $12.72 | 1 |
By program year
Records — PY2020 (5)
| Record ID | Paying entity | Amount | Date | Nature of payment | Dispute status | Published | Source |
|---|---|---|---|---|---|---|---|
| 721950023 | AbbVie Inc. | $18.00 | 10/21/2020 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 723662281 | Allergan, Inc. | $16.73 | 03/12/2020 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 723662283 | Allergan, Inc. | $13.50 | 05/30/2020 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 737216947 | Esperion Therapeutics, Inc. | $12.72 | 10/27/2020 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 743090617 | PFIZER INC. | $14.99 | 02/19/2020 | 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_PGYR2020_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.