Healthcare provider profile · identity verified

Constantine John Tsamasfyros, M.D.

Allopathic & Osteopathic Physicians|Internal Medicine · DENVER, CO · NPI 1114989332

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 Constantine John Tsamasfyros, M.D. received $723.96 in general payments during 2025 across 28 reported records.

AstraZeneca Pharmaceuticals LP accounted for 33.7% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 16 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Trelegy Ellipta.

AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported SYMBICORT as an associated drug or biological on 71 records involving 51 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Symbicort by this doctor in 2024.

GlaxoSmithKline, LLC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported TRELEGY ELLIPTA as an associated drug or biological on 131532 records involving 37148 distinct recipient NPIs. Public Medicare Part D data also shows 30 claims for Trelegy Ellipta by this doctor in 2024.

Novo Nordisk 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 Ozempic as an associated drug or biological on 261625 records involving 77793 distinct recipient NPIs. Public Medicare Part D data also shows 19 claims for Ozempic by this doctor in 2024.

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

Payment overview · 2025

General Payments

$723.96

28 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
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $244.0133.7%72025
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $95.6313.2%42025
Neurocrine BioSciences, Inc. Unresolved — no canonical attribution shown $83.9411.6%32025
Amgen Inc. Unresolved — no canonical attribution shown $78.6210.9%42025
Teva Pharmaceuticals USA, Inc. Unresolved — no canonical attribution shown $56.337.8%22025
ABBVIE INC. Unresolved — no canonical attribution shown $30.344.2%22025
Electromed, Inc. Unresolved — no canonical attribution shown $28.974.0%12025
Exact Sciences Corporation Unresolved — no canonical attribution shown $27.843.9%12025
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) Unresolved — no canonical attribution shown $26.003.6%12025
ANI Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $18.492.5%12025
Novo Nordisk Inc Unresolved — no canonical attribution shown $17.482.4%12025
Paratek Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $16.312.2%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$723.9628

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
AIRSUPRA
Normalized: airsupra
Drug AstraZeneca Pharmaceuticals LP $150.44 2 2025
Source payment records
TRELEGY ELLIPTA
Normalized: trelegy ellipta
Drug GlaxoSmithKline, LLC. $95.63 4 2025
Source payment records
INGREZZA
Normalized: ingrezza
Drug Neurocrine BioSciences, Inc. $83.94 3 2025
Source payment records
OTEZLA
Normalized: otezla
Drug Amgen Inc. $59.55 3 2025
Source payment records
REPATHA
Normalized: repatha
Biological Amgen Inc. $59.55 3 2025
Source payment records
AUSTEDO XR
Normalized: austedo xr
Drug Teva Pharmaceuticals USA, Inc. $56.33 2 2025
Source payment records
BREZTRI
Normalized: breztri
Drug AstraZeneca Pharmaceuticals LP $55.84 3 2025
Source payment records
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $30.34 2 2025
Source payment records
SMARTVEST
Normalized: smartvest
Device Electromed, Inc. $28.97 1 2025
Source payment records
Cologuard Collection Kit
Normalized: cologuard collection kit
Device Exact Sciences Corporation $27.84 1 2025
Source payment records
CAPLYTA
Normalized: caplyta
Drug ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) $26.00 1 2025
Source payment records
EVENITY
Normalized: evenity
Biological Amgen Inc. $19.07 1 2025
Source payment records
PROLIA
Normalized: prolia
Biological Amgen Inc. $19.07 1 2025
Source payment records
PURIFIED CORTROPHIN GEL
Normalized: purified cortrophin gel
Drug ANI Pharmaceuticals, Inc. $18.49 1 2025
Source payment records
Wegovy
Normalized: wegovy
Drug Novo Nordisk Inc $17.48 1 2025
Source payment records
NUZYRA
Normalized: nuzyra
Drug Paratek Pharmaceuticals, Inc. $16.31 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

Open Payments productPayment yearPart D brandPart D yearClaimsMatch methodSource
TRELEGY ELLIPTA
trelegy ellipta
2025 Trelegy Ellipta 2024 30
Beneficiary count suppressed
exact normalized Medicare Part D

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
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 SYMBICORT
open payments reported associated product
CMS Open Payments — General Payments
71 supporting records · 51 recipient NPIs · example record 1206132610
Symbicort · 2024
Exact normalized brand match · 1 Part D row
15 suppressed by CMS
GlaxoSmithKline, LLC.
Exact reporting entity; no affiliate inference
2025 TRELEGY ELLIPTA
open payments reported associated product
CMS Open Payments — General Payments
131532 supporting records · 37148 recipient NPIs · example record 1190332369
Trelegy Ellipta · 2024
Exact normalized brand match · 1 Part D row
30 suppressed by CMS
Novo Nordisk Inc
Exact reporting entity; no affiliate inference
2025 Ozempic
open payments reported associated product
CMS Open Payments — General Payments
261625 supporting records · 77793 recipient NPIs · example record 1188130076
Ozempic · 2024
Exact normalized brand match · 1 Part D row
19 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
Atorvastatin CalciumAtorvastatin Calcium28393
Amlodipine BesylateAmlodipine Besylate18759
Potassium ChloridePotassium Chloride17162
FamotidineFamotidine16365
Oxycodone HclOxycodone Hcl16325
LisinoprilLisinopril14045
Losartan PotassiumLosartan Potassium13440
Metformin HclMetformin Hcl11136
Zolpidem TartrateZolpidem Tartrate10418
Levothyroxine SodiumLevothyroxine Sodium8628
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen86suppressed
Tamsulosin HclTamsulosin Hcl8432
Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine7812
FinasterideFinasteride7831
PrednisonePrednisone7625
AzithromycinAzithromycin7147
AllopurinolAllopurinol7023
Metoprolol SuccinateMetoprolol Succinate7022
GabapentinGabapentin6922
FurosemideFurosemide5922
Nebivolol HclNebivolol Hcl5826
Sertraline HclSertraline Hcl5816
DiazepamDiazepam5711
CarvedilolCarvedilol4615
Metoprolol TartrateMetoprolol Tartrate43suppressed
Rosuvastatin CalciumRosuvastatin Calcium4313
OmeprazoleOmeprazole4218
Albuterol Sulfate HfaAlbuterol Sulfate4117
Olmesartan-HydrochlorothiazideOlmesartan/Hydrochlorothiazide4013
AlprazolamAlprazolam38suppressed
HydrochlorothiazideHydrochlorothiazide3815
Breztri AerosphereBudesonide/Glycopyr/Formoterol3716
MirtazapineMirtazapine3613
PregabalinPregabalin3612
ClopidogrelClopidogrel Bisulfate34suppressed
EliquisApixaban34suppressed
TemazepamTemazepam32suppressed
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide3113
Clotrimazole-BetamethasoneClotrimazole/Betamethasone Dip3017
Escitalopram OxalateEscitalopram Oxalate3012
Liothyronine SodiumLiothyronine Sodium30suppressed
Metformin Hcl ErMetformin Hcl3011
Trelegy ElliptaFluticasone/Umeclidin/Vilanter30suppressed
LorazepamLorazepam29suppressed
DexamethasoneDexamethasone2823
MethotrexateMethotrexate Sodium28suppressed
Olmesartan MedoxomilOlmesartan Medoxomil28suppressed
Pantoprazole SodiumPantoprazole Sodium2812
ValsartanValsartan26suppressed
Donepezil HclDonepezil Hcl24suppressed
EzetimibeEzetimibe2412
Warfarin SodiumWarfarin Sodium24suppressed
XareltoRivaroxaban24suppressed
Trazodone HclTrazodone Hcl23suppressed
Hydroxyzine HclHydroxyzine Hcl21suppressed
Tramadol HclTramadol Hcl21suppressed
JardianceEmpagliflozin20suppressed
OzempicSemaglutide19suppressed
Bupropion XlBupropion Hcl18suppressed
ClonazepamClonazepam18suppressed
Alendronate SodiumAlendronate Sodium17suppressed
LamotrigineLamotrigine17suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide17suppressed
AcyclovirAcyclovir16suppressed
Carbidopa-LevodopaCarbidopa/Levodopa16suppressed
Ciprofloxacin HclCiprofloxacin Hcl1512
Duloxetine HclDuloxetine Hcl15suppressed
SimvastatinSimvastatin15suppressed
SymbicortBudesonide/Formoterol Fumarate15suppressed
Amitriptyline HclAmitriptyline Hcl14suppressed
Amlodipine Besylate-BenazeprilAmlodipine Besylate/Benazepril14suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog14suppressed
Oxybutynin ChlorideOxybutynin Chloride14suppressed
TrulicityDulaglutide14suppressed
BaclofenBaclofen13suppressed
Diclofenac PotassiumDiclofenac Potassium13suppressed
MeloxicamMeloxicam13suppressed
Nano 2nd Gen Pen NeedlePen Needle, Diabetic13suppressed
Acetaminophen-CodeineAcetaminophen With Codeine12suppressed
Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate12suppressed
Diclofenac SodiumDiclofenac Sodium12suppressed
Doxycycline MonohydrateDoxycycline Monohydrate12suppressed
Insulin Lispro Kwikpen U-100Insulin Lispro11suppressed
Propranolol HclPropranolol Hcl11suppressed

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 $723.96 · 28 records AstraZeneca Pharmaceuticals LP AIRSUPRA, AUSTEDO XR, BREZTRI, CAPLYTA, Cologuard Collection Kit, EVENITY, INGREZZA, NUZYRA, OTEZLA, PROLIA, PURIFIED CORTROPHIN GEL, REPATHA, SMARTVEST, TRELEGY ELLIPTA, VRAYLAR, Wegovy 3
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