Leonard Kerwin, MD
Dermatology · West Bloomfield, MINPI 1942525837
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $113,275 of the $140,538 with a category attached, or 80.6%. 43 manufacturers reported payments, led by Galderma Laboratories, L.p. at 45.7% of the total. 2025 is the largest year on record at $55,757, more than ten times the $2,207 reported in 2019. Among dermatology clinicians in MI with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 982 payments — averaging $143.11 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Galderma Laboratories, L.p.$64K
- Pfizer$63K
- Johnson & Johnson$2K
- Sun Pharmaceutical Industries Inc.$2K
- Zerigo Health, Inc.$1K
- AbbVie$1K
- plus $7K from 37 others
What the payments were for
- Consulting fees$5,6254%
- Speaking & faculty fees$113,27581%
- Travel & lodging$3,8843%
- Food & beverage$17,18612%
- Education$5670%
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.
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
$140,538 in reported general payments places this provider in the 95th 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 |
|---|---|---|
| Dupixent PenDupilumab | 16 | $57,715 |
| Clobetasol Propionate | 135 | $4,121 |
| Ketoconazole | 186 | $2,619 |
| Triamcinolone Acetonide | 233 | $2,411 |
| Metronidazole | 49 | $2,173 |
| Azelaic Acid | 20 | $2,075 |
| Mupirocin | 199 | $1,636 |
| Fluocinonide | 71 | $1,344 |
| Cephalexin | 136 | $869 |
| Nystatin | 58 | $761 |
| Tretinoin | 21 | $715 |
| Doxycycline Hyclate | 60 | $579 |
| Clindamycin Phosphate | 17 | $568 |
| Doxycycline Monohydrate | 29 | $420 |
| Econazole Nitrate | 17 | $356 |
Paid to pharmacies, not to this prescriber.
Other dermatology in West Bloomfield
- Linda Stein GoldWest Bloomfield$3.3M
- Michael DormanWest Bloomfield$433K
- Leonard CetnerWest Bloomfield$22K
- Kristi HawleyCaledonia$2.2M
- David AltmanWarren$1.9M
- Michael SiegelWaterford$708K
- Johann GudjonssonAnn Arbor$535K
- Steven DaveluyDearborn$350K
- Benjamin WorkmanMidland$284K
- Diana WestgateKalamazoo$252K
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.