Allan Anderson, MD
Geriatric Psychiatry · Cambridge, MDNPI 1083670517
Payments from drug & device makers
What this record shows
The money is spread across several categories — speaking fees (34.9%), food and beverage and travel and lodging — rather than concentrated in one kind of arrangement. 13 manufacturers reported payments, led by E.r. Squibb & Sons, L.L.C. at 39.1% of the total. Reporting peaked in 2024 at $1,559 and has fallen 84.3% since, to $245 in 2025.
Across 21 payments — averaging $177.54 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- E.r. Squibb & Sons, L.L.C.$1K
- Biogen$1K
- Acadia Pharmaceuticals Inc$189
- Eisai Inc.$183
- Lundbeck LLC$101
- Merck$75
- plus $325 from 7 others
Across 30 payments — averaging $55,318 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.
- Eli Lilly$1.7M
What the payments were for
- Speaking & faculty fees$1,30235%
- Travel & lodging$1,15031%
- Food & beverage$1,24633%
- Education$301%
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 |
|---|---|---|
| E.r. Squibb & Sons, L.L.C. | 3 | $1,458 |
| Biogen | 2 | $1,398 |
| Acadia Pharmaceuticals Inc | 3 | $189 |
| Eisai Inc. | 2 | $183 |
| Lundbeck LLC | 2 | $101 |
| Merck | 1 | $75 |
| Novo Nordisk | 1 | $66 |
| Corium, LLC | 1 | $55 |
| AbbVie(2 entities) | 2 | $55 |
| Genentech USA, Inc. | 1 | $53 |
| Otsuka Pharmaceutical Development & Commercialization, Inc. | 1 | $50 |
| Lilly USA, LLC | 1 | $26 |
| Sunovion Pharmaceuticals Inc. | 1 | $19 |
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.
- Leqembi$100
How this compares
Too few geriatric psychiatry providers in Marylandto place this figure against a meaningful peer group, so we don't.
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 |
|---|---|---|
| TrintellixVortioxetine Hydrobromide | 11 | $8,643 |
| Memantine Hcl | 310 | $8,129 |
| Memantine Hcl ErMemantine Hcl | 19 | $4,124 |
| Rivastigmine | 29 | $3,921 |
| Donepezil Hcl | 275 | $2,429 |
| Aripiprazole | 14 | $1,927 |
| Mirtazapine | 51 | $1,794 |
| Venlafaxine Hcl ErVenlafaxine Hcl | 32 | $1,458 |
| Escitalopram Oxalate | 97 | $1,100 |
| Duloxetine Hcl | 26 | $756 |
| RivastigmineRivastigmine Tartrate | 13 | $687 |
| Sertraline Hcl | 40 | $589 |
| Quetiapine Fumarate | 43 | $319 |
| Clonazepam | 11 | $145 |
| Trazodone Hcl | 35 | $128 |
Paid to pharmacies, not to this prescriber.
Other geriatric psychiatry in Cambridge
- Edward SwantonLutherville$313K
- Christopher KowalskyBethesda$803
- Vladimir DemidovAnnapolis$588
- Deborah DallamSilver Spring$400
- Ugandhar VemulapalliBaltimore$200
- Muhammad BurhanullahBaltimore$189
- Olayinka JohnsonLinthicum$61
- Tamela McClamBaltimore$37
- Robert RocaBaltimore$0
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.