FREDERICK ALAN KLEIN
Allopathic & Osteopathic Physicians|Internal Medicine|Gastroenterology TUCSON, AZ NPI 1962487876
Browse related groups: Allopathic & Osteopathic Physicians|Internal Medicine|Gastroenterology AZ ABBVIE INC. All categories
General Payments — all program years on this page
$5,198.97
- Category: General Payments
- Program years: PY2018–2024
- Record count: 313
- As of (CMS publication): 2026-01-23
Latest program year (PY2024): $1,097.01 across 54 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 | $1,097.01 | 54 |
By paying entity
Latest program year (PY2024) · sorted by reported total.
| Paying entity | Amount | Records |
|---|---|---|
| ABBVIE INC. | $187.44 | 9 |
| Janssen Biotech, Inc. | $137.68 | 7 |
| Regeneron Healthcare Solutions, Inc. | $110.11 | 4 |
| IRONWOOD PHARMACEUTICALS, INC | $68.88 | 4 |
| Takeda Pharmaceuticals U.S.A., Inc. | $67.66 | 3 |
| Celgene Corporation | $57.28 | 4 |
| Ardelyx, Inc. | $53.03 | 3 |
| GENZYME CORPORATION | $51.40 | 2 |
| Celltrion USA Inc. | $45.40 | 1 |
| Biocon Biologics Inc | $45.04 | 2 |
| QOL Medical, LLC | $38.06 | 2 |
| PFIZER INC. | $37.07 | 2 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | $36.13 | 2 |
| Madrigal Pharmaceuticals | $32.82 | 1 |
| Ferring Pharmaceuticals Inc. | $30.85 | 2 |
| Gilead Sciences, Inc. | $29.06 | 2 |
| INTERCEPT PHARMACEUTICALS, INC. | $19.15 | 1 |
| Lilly USA, LLC | $19.00 | 1 |
| Phathom Pharmaceuticals, Inc. | $16.30 | 1 |
| Braintree Laboratories, Inc. | $14.65 | 1 |
By program year
Records — PY2024 (54)
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
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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.