Alexandra Hahn Waldenmaier, MD
Surgical Critical Care · Dallas, TXNPI 1871029207
Payments from drug & device makers
What this record shows
This record is dominated by education: $2,500 of the $3,622 with a category attached, or 69.0%. Intuitive Surgical accounts for 90.6% of it on its own, with 9 other manufacturers making up the rest. Reporting peaked in 2024 at $3,425 and has fallen 97.0% since, to $102 in 2025.
Across 22 payments — averaging $164.64 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$3K
- Davol Inc.$87
- Johnson & Johnson$64
- Kerecis Limited$49
- Acera Surgical, Inc.$47
- Octapharma USA, Inc.$23
- plus $71 from 4 others
What the payments were for
- Travel & lodging$60717%
- Food & beverage$51514%
- Education$2,50069%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Intuitive Surgical | 8 | $3,281 |
| Davol Inc. | 2 | $87 |
| Johnson & Johnson | 3 | $64 |
| Kerecis Limited | 2 | $49 |
| Acera Surgical, Inc. | 2 | $47 |
| Octapharma USA, Inc. | 1 | $23 |
| Medtronic | 1 | $21 |
| Avita Medical Americas, LLC | 1 | $19 |
| La Jolla Pharmaceutical Company | 1 | $19 |
| AbbVie | 1 | $12 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- DAVINCI XI$2,500
- Da Vinci Surgical System$451
How this compares
$3,622 in reported general payments places this provider in the 60th percentile of 104 surgical critical care providers in Texas.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Other surgical critical care in Dallas
- Mohammad FrotanDallas$23K
- Philip EdmundsonDallas$5K
- Matthew ElsonDallas$4K
- Maria AhmadDallas$3K
- Conner McDanielDallas$2K
- David DuvallDallas$2K
- Chase KnickerbockerDallas$1K
- Samir AwadHouston$1.6M
- Sharmilla DissanaikeLubbock$844K
- Robert SouthardHouston$215K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.