Malcolm Mackenzie, MD
Obstetrics & Gynecology · Lexington, MANPI 1578650610
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $8,545 of the $11,073 with a category attached, or 77.2%. 8 manufacturers reported payments, led by Olympus Winter & Ibe GmbH at 40.8% of the total. Reporting peaked in 2020 at $4,515 and has fallen 75.1% since, to $1,125 in 2025. Among obstetrics & gynecology clinicians in MA 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 22 payments — averaging $503.32 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Olympus Winter & Ibe GmbH$5K
- Coopersurgical, Inc.$3K
- Gyrus ACMI, Inc.$2K
- Olympus Corporation Of The Americas$1K
- Intuitive Surgical$359
- Coloplast$156
- plus $133 from 2 others
What the payments were for
- Consulting fees$8,54577%
- Speaking & faculty fees$1,74016%
- Food & beverage$7887%
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 |
|---|---|---|
| Olympus Winter & Ibe GmbH | 5 | $4,515 |
| Coopersurgical, Inc. | 5 | $2,737 |
| Gyrus ACMI, Inc. | 2 | $2,035 |
| Olympus Corporation Of The Americas | 3 | $1,139 |
| Intuitive Surgical | 3 | $359 |
| Coloplast | 1 | $156 |
| Boston Scientific | 1 | $94 |
| Bayer | 2 | $38 |
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
$11,073 in reported general payments places this provider in the 95th percentile of 910 obstetrics & gynecology providers in Massachusetts.
See all obstetrics & gynecology providers in Massachusetts →
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 |
|---|---|---|
| Baclofen | 41 | $1,982 |
| Diazepam | 68 | $548 |
| Estradiol | 17 | $441 |
| Fluconazole | 24 | $428 |
| Hydromorphone Hcl | 62 | $389 |
| Ondansetron Hcl | 13 | $296 |
| Ketorolac Tromethamine | 12 | $260 |
| Cyclobenzaprine Hcl | 11 | $69 |
| Ibuprofen | 12 | $6 |
Paid to pharmacies, not to this prescriber.
Other obstetrics & gynecology in Lexington
- Soheil Amin HanjaniBrockton$386K
- Joelle LiemanBrighton$215K
- Elizabeth OnyemelukweBoston$135K
- James GreenbergBoston$119K
- Stephanie AlimenaBoston$75K
- Denis VaughanBoston$38K
- Lara KingstonPlymouth$37K
- Erica RobinsonWorcester$32K
- Roxanne GardnerBoston$31K
- James WangSpringfield$27K
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.