William Hasler, MD
Gastroenterology · Ann Arbor, MINPI 1346322872
Payments from drug & device makers
Across 18 payments — averaging $421.92 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Enterra Medical, Inc.$4K
- Evoke Pharma, Inc.$3K
- Vanda Pharmaceuticals Inc.$129
- Cumberland Pharmaceuticals, Inc.$99
- Atmo Biosciences Inc$83
- Shire North American Group Inc$31
- plus $28 from 1 others
Across 3 payments — averaging $115.00 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Atmo Biosciences Inc$345
What the payments were for
- Consulting fees$2,90038%
- Speaking & faculty fees$3,01040%
- Food & beverage$1,68522%
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 |
|---|---|---|
| Enterra Medical, Inc. | 11 | $4,054 |
| Evoke Pharma, Inc. | 2 | $3,172 |
| Vanda Pharmaceuticals Inc. | 1 | $129 |
| Cumberland Pharmaceuticals, Inc. | 1 | $99 |
| Atmo Biosciences Inc | 1 | $83 |
| Shire North American Group Inc | 1 | $31 |
| Anx Robotica Corp | 1 | $28 |
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.
- GIMOTI$3,172
How this compares
$7,595 in reported general payments places this provider in the 70th percentile of 497 gastroenterology providers in Michigan.
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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| XifaxanRifaximin | 23 | $34,387 |
| CreonLipase/Protease/Amylase | 11 | $27,007 |
| MotegrityPrucalopride Succinate | 11 | $12,806 |
| LinzessLinaclotide | 14 | $8,490 |
| Colestipol Hcl | 11 | $1,501 |
| Famotidine | 66 | $1,284 |
| Mirtazapine | 36 | $747 |
| Ondansetron OdtOndansetron | 15 | $390 |
| Pantoprazole Sodium | 30 | $379 |
| Neomycin Sulfate | 13 | $337 |
| Gavilyte-GPeg3350/Sod Sulf,bicarb,cl/Kcl | 17 | $289 |
| Gentamicin Sulfate | 53 | $213 |
| Meclizine Hcl | 14 | $171 |
Paid to pharmacies, not to this prescriber.
Other gastroenterology in Ann Arbor
- Jeffery BerinsteinAnn Arbor$3.3M
- Peter HigginsAnn Arbor$2.4M
- Frederick AskariAnn Arbor$1.4M
- Ryan StidhamAnn Arbor$656K
- Shanti EswaranAnn Arbor$575K
- Philip SchoenfeldAnn Arbor$539K
- Michelle Muza-MoonsAnn Arbor$481K
- Anna LokAnn Arbor$434K
- Joan ChenAnn Arbor$409K
- Hari ConjeevaramAnn Arbor$352K
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.