Healthcare provider profile · identity verified

Thomas P. Leist, M.D.

Allopathic & Osteopathic Physicians|Psychiatry & Neurology|Neurology · PHILADELPHIA, PA · NPI 1801816681

Profile state: payments and partd Open Payments: 2025 Medicare Part D: 2024 Last identity check: 2026-08-10 Page data build: 2026-08-12

Verified facts

What the public records show

CMS Open Payments records show Thomas P. Leist, M.D. received $124,443.05 in general payments during 2025 across 167 reported records.

TG Therapeutics, Inc. accounted for 31.1% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 11 associated products.

Genentech USA, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Enspryng as an associated drug or biological on 186 records involving 143 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Enspryng by this doctor in 2024.

These records do not establish that a payment influenced prescribing or medical care.

Payment overview · 2025

General Payments

$124,443.05

167 reported records · 12 companies

Separate record types

Research & Ownership

Research Payments (direct recipient): not present in the loaded data

Associated Research Funding (for example, named PI): not present in the loaded data

Ownership / Investment: not present in the loaded data

These categories are never added into the General Payments headline. Associated research funding must not be described as money the doctor personally received unless the source record supports that conclusion.

Who paid this doctor?

Companies in 2025 General Payments

Reported companyCanonical companyAmountShareRecordsYear
TG Therapeutics, Inc. Unresolved — no canonical attribution shown $38,677.5931.1%362025
Amgen Inc. Unresolved — no canonical attribution shown $26,806.3321.5%372025
Genentech USA, Inc. Unresolved — no canonical attribution shown $18,350.5914.8%142025
Alexion Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $15,231.3812.2%122025
Biogen, Inc. Unresolved — no canonical attribution shown $11,084.218.9%202025
Novartis Pharmaceuticals Corporation Unresolved — no canonical attribution shown $7,883.776.3%142025
GENZYME CORPORATION Unresolved — no canonical attribution shown $5,718.784.6%52025
EMD Serono, Inc. Unresolved — no canonical attribution shown $350.400.3%122025
Celgene Corporation Unresolved — no canonical attribution shown $159.240.1%112025
Vanda Pharmaceuticals Inc. Unresolved — no canonical attribution shown $113.690.1%42025
Merz Pharmaceuticals, LLC Unresolved — no canonical attribution shown $42.470.0%12025
Cycle Pharmaceuticals Inc Unresolved — no canonical attribution shown $24.600.0%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$65,662.0019
Consulting Fee$43,443.509
Travel and Lodging$10,850.5036
Food and Beverage$4,487.05103

A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.

Analysis 1 · Payment-linked products

Products named in Open Payments records

Reported productTypeReported companyRelated amount*RecordsYear
BRIUMVI
Normalized: briumvi
Drug TG Therapeutics, Inc. $38,677.59 36 2025
Source payment records
UPLIZNA
Normalized: uplizna
Biological Amgen Inc. $26,751.53 35 2025
Source payment records
ULTOMIRIS
Normalized: ultomiris
Biological Alexion Pharmaceuticals, Inc. $7,929.38 8 2025
Source payment records
KESIMPTA
Normalized: kesimpta
Drug Novartis Pharmaceuticals Corporation $7,883.77 14 2025
Source payment records
Ocrevus
Normalized: ocrevus
Biological Genentech USA, Inc. $3,462.06 2 2025
Source payment records
TYSABRI
Normalized: tysabri
Biological Biogen, Inc. $301.21 12 2025
Source payment records
VUMERITY
Normalized: vumerity
Drug Biogen, Inc. $272.56 11 2025
Source payment records
ZEPOSIA
Normalized: zeposia
Drug Celgene Corporation $159.24 11 2025
Source payment records
PONVORY
Normalized: ponvory
Drug Vanda Pharmaceuticals Inc. $113.69 4 2025
Source payment records
AMPYRA
Normalized: ampyra
Drug Merz Pharmaceuticals, LLC $42.47 1 2025
Source payment records
Tascenso ODT
Normalized: tascenso odt
Drug Cycle Pharmaceuticals Inc $24.60 1 2025
Source payment records

* Product-associated amounts are non-additive because one payment record may name more than one product.

These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.

Public prescribing for products named in payments

No exact normalized or approved-alias overlap was found in the loaded Part D year. This does not mean the doctor never prescribed the product.

The presence of the same drug in both datasets does not show that a payment caused or influenced a prescription.

Analysis 2 · Same-company prescribing overlap

Drugs reported in other payments from the same company that also appear in Medicare Part D

This analysis is independent from products named on this doctor’s individual payment records. A row appears only when the exact Open Payments reporting entity paid this doctor, that same reporting entity reported the drug or biological on at least 10 loaded General Payment records involving at least 2 distinct recipient NPIs, and this doctor has the same non-generic brand in public Part D data. This does not mean the company owns or manufactures the drug.

Paying companyPayment yearDrug reported by same entityOpen Payments evidencePart DClaimsBeneficiaries
Genentech USA, Inc.
Exact reporting entity; no affiliate inference
2025 Enspryng
open payments reported associated product
CMS Open Payments — General Payments
186 supporting records · 143 recipient NPIs · example record 1211488510
Enspryng · 2024
Exact normalized brand match · 1 Part D row
12 suppressed by CMS

These facts do not show that a payment was for the drug, that the company owns or manufactures the drug, or that a payment caused or influenced prescribing.

Public Medicare Part D data

Provider-and-drug rows loaded for 2024

BrandGenericClaimsBeneficiaries
BaclofenBaclofen24490
GabapentinGabapentin18865
Dalfampridine ErDalfampridine14434
TeriflunomideTeriflunomide12222
Tizanidine HclTizanidine Hcl11854
Kesimpta PenOfatumumab9718
Duloxetine HclDuloxetine Hcl8229
Glatiramer AcetateGlatiramer Acetate6313
ModafinilModafinil5824
CelecoxibCelecoxib5618
AubagioTeriflunomide53suppressed
DiazepamDiazepam5213
CopaxoneGlatiramer Acetate38suppressed
Dimethyl FumarateDimethyl Fumarate38suppressed
AmantadineAmantadine Hcl3714
LeflunomideLeflunomide3214
GlatopaGlatiramer Acetate31suppressed
PregabalinPregabalin3014
LevetiracetamLevetiracetam28suppressed
LamotrigineLamotrigine21suppressed
Gammagard LiquidImmun Glob G(Igg)/Gly/Iga Ov5020suppressed
Amitriptyline HclAmitriptyline Hcl17suppressed
TopiramateTopiramate17suppressed
FingolimodFingolimod Hcl16suppressed
LidocaineLidocaine16suppressed
Oxybutynin Chloride ErOxybutynin Chloride15suppressed
PrednisonePrednisone15suppressed
IbuprofenIbuprofen14suppressed
Methylprednisolone Sodium SuccMethylprednisolone Sod Succ14suppressed
Avonex (4 Pack)Interferon Beta-1a13suppressed
Sertraline HclSertraline Hcl13suppressed
EnspryngSatralizumab-Mwge12suppressed
Lidocaine-PrilocaineLidocaine/Prilocaine12suppressed
LorazepamLorazepam12suppressed
Mycophenolate MofetilMycophenolate Mofetil12suppressed
Zolpidem TartrateZolpidem Tartrate12suppressed
AuvelityDextromethorphan Hbr/Bupropion11suppressed
ClonazepamClonazepam11suppressed
Nurtec OdtRimegepant Sulfate11suppressed
Oxybutynin ChlorideOxybutynin Chloride11suppressed

Timeline

Payment and prescribing data by year

Open Payments and Medicare Part D may refer to different years. They are shown separately rather than aligned as if they describe the same period.

YearGeneral PaymentsMain payerExplicit productsCompany overlapsPart D coverage
2025 $124,443.05 · 167 records TG Therapeutics, Inc. AMPYRA, BRIUMVI, KESIMPTA, Ocrevus, PONVORY, TYSABRI, Tascenso ODT, ULTOMIRIS, UPLIZNA, VUMERITY, ZEPOSIA 1
2024 Complete

Questions to ask

Questions you could discuss with your doctor

These are general questions generated from reviewed templates. They are not personalized medical advice.

Sources and limitations

How to read this page

Loaded source releases

DatasetYearPublicationSource
CMS Open Payments — General Payments 2025 2026-06-30 Original source
Medicare Part D Prescribers by Provider and Drug 2024 2026-05-06 Original source
NPPES Data Dissemination V2 current / reference data 2026-08-10 Original source

Methodology version: 2.1

Editorial template version: 2.4

Product contract version: 2.0

Schema version: 0.7.0

Page data build: 2026-08-12T23:34:59.370714+00:00

Publication policy: eligible for indexing after public-launch controls are enabled

Full methodology · Questions & answers · Report a possible error