Alfred Heinser, MD
Internal Medicine · Groton, MANPI 1871570218
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 98.9% of the total across 757 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 42 manufacturers, the largest accounting for just 18.3% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2019 at $3,202 and has fallen 75.7% since, to $779 in 2025. Among internal medicine 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 757 payments — averaging $21.87 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Johnson & Johnson$3K
- Pfizer$2K
- AbbVie$1K
- Amgen$1K
- GSK$1K
- AstraZeneca$1K
- plus $6K from 36 others
What the payments were for
- Food & beverage$16,36599%
- Education$1901%
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.
How this compares
$16,555 in reported general payments places this provider in the 95th percentile of 4,983 internal medicine 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 |
|---|---|---|
| Rosuvastatin Calcium | 96 | $2,326 |
| Atorvastatin Calcium | 183 | $2,239 |
| ThyquidityLevothyroxine Sodium | 14 | $1,826 |
| Losartan Potassium | 75 | $953 |
| Amlodipine Besylate | 118 | $773 |
| Metoprolol Succinate | 42 | $772 |
| Lisinopril | 96 | $713 |
| Omeprazole | 48 | $623 |
| Albuterol Sulfate HfaAlbuterol Sulfate | 21 | $502 |
| Sertraline Hcl | 46 | $491 |
| Ezetimibe | 18 | $438 |
| Metformin Hcl | 62 | $420 |
| Simvastatin | 52 | $370 |
| Allopurinol | 42 | $294 |
| Levothyroxine Sodium | 32 | $284 |
Paid to pharmacies, not to this prescriber.
Other internal medicine in Groton
- David SchenkeinBoston$5M
- Alan GarberCambridge$4.9M
- John FallonBoston$1.8M
- Michael MendelsohnBoston$1.6M
- Sandra RichmanBrookline$1.4M
- Gaurav SingalBoston$798K
- Asit ParikhBoston$486K
- Noopur RajeBoston$481K
- Daniel KuritzkesBoston$443K
- Xiuning leBoston$364K
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.