William Mariencheck
Sleep Medicine · Memphis, TNNPI 1467432203
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 98.4% of the total across 199 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 26 manufacturers, the largest accounting for just 16.8% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2021 at $1,221 and has fallen 97.9% since, to $26 in 2025.
Across 199 payments — averaging $15.62 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- GSK$523
- Boehringer Ingelheim$439
- Insmed, Inc.$359
- AstraZeneca$327
- Genentech USA, Inc.$171
- United Therapeutics Corporation$158
- plus $1K from 20 others
What the payments were for
- Food & beverage$3,05898%
- Education$502%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| GSK | 45 | $523 |
| Boehringer Ingelheim | 32 | $439 |
| Insmed, Inc. | 21 | $359 |
| AstraZeneca | 16 | $327 |
| Genentech USA, Inc. | 13 | $171 |
| United Therapeutics Corporation | 5 | $158 |
| Sanofi | 8 | $138 |
| Philips North America LLC | 5 | $133 |
| Sunovion Pharmaceuticals Inc. | 9 | $131 |
| La Jolla Pharmaceutical Company | 6 | $101 |
| Mallinckrodt Hospital Products Inc. | 6 | $95 |
| CSL Behring | 3 | $69 |
| Mylan Specialty L.p. | 5 | $67 |
| Gilead | 4 | $60 |
| Fisher & Paykel Healthcare Inc | 2 | $52 |
| Harmony Biosciences LLC | 2 | $41 |
| AbbVie(2 entities) | 3 | $40 |
| Takeda Pharmaceuticals U.S.A., Inc. | 2 | $31 |
| Mallinckrodt Enterprises LLC | 2 | $30 |
| Actelion Pharmaceuticals US, Inc. | 2 | $28 |
| Cumberland Pharmaceuticals, Inc. | 2 | $28 |
| Novartis | 2 | $27 |
| Jazz Pharmaceuticals Inc. | 1 | $20 |
| Tetraphase Pharmaceuticals, Inc. | 1 | $17 |
| Grifols USA, LLC | 1 | $13 |
| Mayne Pharma Commercial LLC | 1 | $13 |
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.
How this compares
$3,109 in reported general payments places this provider in the 65th percentile of 41 sleep medicine providers in Tennessee.
Other sleep medicine in Memphis
- Merrill WiseMemphis$7K
- James AndrewsMemphis$4K
- Syed ZaidiMemphis$1K
- Ariel LongMemphis$828
- John McGeheeMemphis$17
- Bijoy JohnBrentwood$38K
- Kelly CardenNashville$24K
- Martha HagamanFranklin$20K
- John DenglerJohnson City$19K
- Prashant JamesKnoxville$11K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.