Healthcare provider profile · identity verified

Jeffrey John Grabenstein, M.D.

Family Practice · OAK RIDGE, TN · NPI 1639277494

Profile state: partd only 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

We did not find matching Open Payments records for this doctor in 2025.

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

Payment overview · 2025

General Payments

We did not find matching Open Payments records for this doctor in the selected program year.

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.

Analysis 1 · Payment-linked products

Products named in Open Payments records

No payment-linked product analysis is available because no matching General Payment records were found for the selected year.

Public prescribing for products named in payments

There is no explicit payment-product set available for a Part D comparison.

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.

There is no payer-company set available for this comparison.

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
Levothyroxine SodiumLevothyroxine Sodium12737
Losartan PotassiumLosartan Potassium7220
Liothyronine SodiumLiothyronine Sodium7018
Tamsulosin HclTamsulosin Hcl6421
ClonazepamClonazepam62suppressed
AzithromycinAzithromycin4631
FamotidineFamotidine4019
GabapentinGabapentin40suppressed
IrbesartanIrbesartan40suppressed
Atorvastatin CalciumAtorvastatin Calcium3911
SynthroidLevothyroxine Sodium39suppressed
Montelukast SodiumMontelukast Sodium3812
Prazosin HclPrazosin Hcl3717
Pantoprazole SodiumPantoprazole Sodium3613
Trazodone HclTrazodone Hcl32suppressed
Albuterol Sulfate HfaAlbuterol Sulfate3114
Rosuvastatin CalciumRosuvastatin Calcium3111
EliquisApixaban30suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium30suppressed
CarvedilolCarvedilol28suppressed
Duloxetine HclDuloxetine Hcl27suppressed
PrednisonePrednisone27suppressed
MeloxicamMeloxicam26suppressed
OmeprazoleOmeprazole2612
Tizanidine HclTizanidine Hcl24suppressed
Venlafaxine Hcl ErVenlafaxine Hcl24suppressed
Nortriptyline HclNortriptyline Hcl22suppressed
Amlodipine BesylateAmlodipine Besylate21suppressed
Doxycycline HyclateDoxycycline Hyclate2116
LisinoprilLisinopril21suppressed
Promethazine HclPromethazine Hcl21suppressed
Metoprolol SuccinateMetoprolol Succinate20suppressed
ValacyclovirValacyclovir Hcl20suppressed
CelecoxibCelecoxib19suppressed
Ondansetron OdtOndansetron19suppressed
Fluticasone PropionateFluticasone Propionate18suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim1815
Tramadol HclTramadol Hcl18suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav1714
EzetimibeEzetimibe17suppressed
Metformin HclMetformin Hcl17suppressed
Methylphenidate HclMethylphenidate Hcl17suppressed
MupirocinMupirocin1711
Ropinirole HclRopinirole Hcl17suppressed
Trelegy ElliptaFluticasone/Umeclidin/Vilanter17suppressed
FarxigaDapagliflozin Propanediol16suppressed
Fluoxetine HclFluoxetine Hcl16suppressed
Repatha SureclickEvolocumab16suppressed
RizatriptanRizatriptan Benzoate16suppressed
TopiramateTopiramate16suppressed
AzathioprineAzathioprine15suppressed
ColchicineColchicine15suppressed
Metformin Hcl ErMetformin Hcl15suppressed
Azelastine HclAzelastine Hcl14suppressed
Oxycodone HclOxycodone Hcl14suppressed
OzempicSemaglutide14suppressed
AllopurinolAllopurinol13suppressed
FluconazoleFluconazole13suppressed
Pravastatin SodiumPravastatin Sodium13suppressed
Cromolyn SodiumCromolyn Sodium12suppressed
MethylprednisoloneMethylprednisolone12suppressed
Paroxetine HclParoxetine Hcl12suppressed
Potassium ChloridePotassium Chloride12suppressed
PregabalinPregabalin12suppressed
RamiprilRamipril12suppressed
EszopicloneEszopiclone11suppressed
GlimepirideGlimepiride11suppressed
HydrochlorothiazideHydrochlorothiazide11suppressed
Pioglitazone HclPioglitazone Hcl11suppressed
SimvastatinSimvastatin11suppressed
TrulicityDulaglutide11suppressed
Zolpidem TartrateZolpidem Tartrate11suppressed

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
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