ZACHARY M CALLAHAN
Allopathic & Osteopathic Physicians|Surgery NASHVILLE, TN NPI 1679969067
Browse related groups: Allopathic & Osteopathic Physicians|Surgery TN INTUITIVE SURGICAL, INC. All categories
General Payments — all program years on this page
$59,364.91
- Category: General Payments
- Program years: PY2021–2024
- Record count: 55
- As of (CMS publication): 2026-01-23
Latest program year (PY2024): $7,348.71 across 29 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 |
|---|---|---|
| Travel and Lodging | $3,280.02 | 10 |
| Education | $3,000.00 | 2 |
| Food and Beverage | $1,068.69 | 17 |
By paying entity
Latest program year (PY2024) · sorted by reported total.
| Paying entity | Amount | Records |
|---|---|---|
| INTUITIVE SURGICAL, INC. | $6,752.95 | 20 |
| W. L. Gore & Associates, Inc. | $236.81 | 2 |
| Ethicon US, LLC | $142.50 | 1 |
| Stryker Corporation | $68.45 | 1 |
| BAXTER HEALTHCARE | $54.05 | 1 |
| Enterra Medical, Inc. | $44.97 | 1 |
| Medtronic, Inc. | $35.15 | 2 |
| CONMED Corporation | $13.83 | 1 |
By program year
Records — PY2024 (29)
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.