Ronald Kerwin, MD
Dermatology · West Bloomfield, MINPI 1265497622
Payments from drug & device makers
Across 347 payments — averaging $23.84 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$2K
- Johnson & Johnson$1K
- Galderma Laboratories, L.p.$794
- Sun Pharmaceutical Industries Inc.$670
- Dermavant Sciences, Inc.$428
- Pfizer$365
- plus $2K from 29 others
What the payments were for
- Speaking & faculty fees$1,39617%
- Food & beverage$6,31176%
- Education$5647%
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 |
|---|---|---|
| AbbVie(2 entities) | 59 | $2,261 |
| Johnson & Johnson | 55 | $1,362 |
| Galderma Laboratories, L.p. | 46 | $794 |
| Sun Pharmaceutical Industries Inc. | 39 | $670 |
| Dermavant Sciences, Inc. | 18 | $428 |
| Pfizer | 13 | $365 |
| Sanofi | 12 | $353 |
| UCB, Inc. | 8 | $212 |
| LEO Pharma Inc. | 12 | $206 |
| Regeneron Healthcare Solutions, Inc. | 8 | $155 |
| Almirall LLC | 7 | $141 |
| Novartis | 8 | $138 |
| Ortho Dermatologics, A Division Of Bausch Health US, LLC | 6 | $102 |
| Sanofi-aventis U.S. LLC | 1 | $100 |
| Incyte Corporation | 4 | $95 |
| Encore Dermatology Inc. | 5 | $89 |
| Lilly USA, LLC | 4 | $87 |
| Biofrontera Inc. | 4 | $81 |
| Botanix SB Inc | 4 | $78 |
| Amgen | 4 | $72 |
| Mayne Pharma Commercial LLC | 5 | $63 |
| E.r. Squibb & Sons, L.L.C. | 4 | $59 |
| Organon | 3 | $55 |
| Helsinn Therapeutics (U.S.), Inc. | 3 | $44 |
| VYNE Pharmaceuticals Inc. | 2 | $42 |
| Boehringer Ingelheim | 1 | $34 |
| Arcutis Biotherapeutics, Inc. | 2 | $32 |
| Fresenius Kabi USA, LLC | 1 | $31 |
| Prugen, Inc. Pharmaceuticals | 3 | $27 |
| Kyowa Kirin, Inc. | 1 | $21 |
| Journey Medical Corporation | 1 | $16 |
| Nabriva Therapeutics, PLC | 1 | $15 |
| Aclaris Therapeutics, Inc. | 1 | $15 |
| Verrica Pharmaceuticals Inc. | 1 | $15 |
| Sebela Pharmaceuticals Inc. | 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
$8,272 in reported general payments places this provider in the 75th percentile of 404 dermatology 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 |
|---|---|---|
| Triamcinolone Acetonide | 469 | $5,744 |
| Fluocinonide | 84 | $2,849 |
| ValacyclovirValacyclovir Hcl | 70 | $2,774 |
| Clindamycin Phosphate | 55 | $2,530 |
| Fluorouracil | 31 | $2,389 |
| Ketoconazole | 93 | $2,348 |
| Doxycycline Monohydrate | 134 | $2,192 |
| Metronidazole | 37 | $1,537 |
| Clotrimazole-BetamethasoneClotrimazole/Betamethasone Dip | 52 | $1,190 |
| Hydrocortisone | 110 | $1,035 |
| Mupirocin | 136 | $1,022 |
| Tretinoin | 18 | $752 |
| Gentamicin Sulfate | 18 | $704 |
| Clobetasol Propionate | 16 | $421 |
| Methylprednisolone | 81 | $413 |
Paid to pharmacies, not to this prescriber.
Other dermatology in West Bloomfield
- Linda Stein GoldWest Bloomfield$7.5M
- Michael DormanWest Bloomfield$433K
- Leonard KerwinWest Bloomfield$141K
- Leonard CetnerWest Bloomfield$22K
- Johann GudjonssonAnn Arbor$15.9M
- Ali MoiinTroy$9.9M
- Wendy McFaldaClarkston$3.6M
- Kristi HawleyCaledonia$2.5M
- Brent BoyceSebewaing$2.2M
- David AltmanWarren$1.9M
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.