Healthcare provider profile · identity verified

Nathaniel Christoph, PA

Physician Assistant · SPRINGFIELD, MA · NPI 1609334077

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

Brand	Generic	Claims	Beneficiaries
Gabapentin	Gabapentin	222	19
Warfarin Sodium	Warfarin Sodium	204	suppressed
Sertraline Hcl	Sertraline Hcl	203	19
Oxycodone Hcl	Oxycodone Hcl	195	35
Amlodipine Besylate	Amlodipine Besylate	174	20
Lorazepam	Lorazepam	174	31
Trazodone Hcl	Trazodone Hcl	174	35
Eliquis	Apixaban	147	29
Mirtazapine	Mirtazapine	139	20
Atorvastatin Calcium	Atorvastatin Calcium	123	32
Metformin Hcl	Metformin Hcl	121	17
Duloxetine Hcl	Duloxetine Hcl	114	14
Pantoprazole Sodium	Pantoprazole Sodium	111	21
Furosemide	Furosemide	100	25
Clonazepam	Clonazepam	90	16
Metoprolol Succinate	Metoprolol Succinate	77	15
Clopidogrel	Clopidogrel Bisulfate	68	suppressed
Lisinopril	Lisinopril	67	14
Carvedilol	Carvedilol	64	suppressed
Simvastatin	Simvastatin	60	suppressed
Metoprolol Tartrate	Metoprolol Tartrate	57	suppressed
Citalopram Hbr	Citalopram Hydrobromide	56	suppressed
Pregabalin	Pregabalin	50	suppressed
Tramadol Hcl	Tramadol Hcl	48	suppressed
Divalproex Sodium	Divalproex Sodium	47	suppressed
Jardiance	Empagliflozin	47	suppressed
Morphine Sulfate	Morphine Sulfate	47	14
Donepezil Hcl	Donepezil Hcl	46	suppressed
Buspirone Hcl	Buspirone Hcl	45	suppressed
Farxiga	Dapagliflozin Propanediol	45	suppressed
Morphine Sulfate Er	Morphine Sulfate	44	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	43	suppressed
Famotidine	Famotidine	42	suppressed
Losartan Potassium	Losartan Potassium	42	11
Cefpodoxime Proxetil	Cefpodoxime Proxetil	41	35
Quetiapine Fumarate	Quetiapine Fumarate	37	suppressed
Omeprazole	Omeprazole	34	suppressed
Prednisone	Prednisone	33	suppressed
Linzess	Linaclotide	31	suppressed
Potassium Chloride	Potassium Chloride	30	suppressed
Diltiazem 24hr Er (La)	Diltiazem Hcl	29	suppressed
Rosuvastatin Calcium	Rosuvastatin Calcium	29	suppressed
Topiramate	Topiramate	29	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	28	suppressed
Tamsulosin Hcl	Tamsulosin Hcl	28	13
Finasteride	Finasteride	27	suppressed
Phenytoin	Phenytoin	27	suppressed
Trulicity	Dulaglutide	27	suppressed
Ezetimibe	Ezetimibe	25	suppressed
Fentanyl	Fentanyl	25	suppressed
Levothyroxine Sodium	Levothyroxine Sodium	25	12
Meclizine Hcl	Meclizine Hcl	25	suppressed
Trulance	Plecanatide	25	suppressed
Baclofen	Baclofen	23	suppressed
Clozapine	Clozapine	23	suppressed
Lorazepam Intensol	Lorazepam	23	15
Amantadine	Amantadine Hcl	21	suppressed
Levetiracetam	Levetiracetam	21	suppressed
Risperidone	Risperidone	21	suppressed
Bumetanide	Bumetanide	20	suppressed
Clozapine Odt	Clozapine	20	suppressed
Glipizide	Glipizide	20	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	18	suppressed
Midodrine Hcl	Midodrine Hcl	18	suppressed
Nifedipine Er	Nifedipine	18	suppressed
Clorazepate Dipotassium	Clorazepate Dipotassium	16	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	16	13
Lamotrigine	Lamotrigine	16	suppressed
Sucralfate	Sucralfate	16	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	15	suppressed
Metronidazole	Metronidazole	15	suppressed
Ondansetron Hcl	Ondansetron Hcl	15	11
Breo Ellipta	Fluticasone/Vilanterol	14	suppressed
Hydromorphone Hcl	Hydromorphone Hcl	14	suppressed
Olanzapine	Olanzapine	14	suppressed
Ropinirole Hcl	Ropinirole Hcl	14	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	13	11
Latanoprost	Latanoprost	13	suppressed
Lokelma	Sodium Zirconium Cyclosilicate	13	suppressed
Meloxicam	Meloxicam	13	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	13	suppressed
Albuterol Sulfate Hfa	Albuterol Sulfate	12	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	12	suppressed
Oseltamivir Phosphate	Oseltamivir Phosphate	12	11
Spironolactone	Spironolactone	12	suppressed
Allopurinol	Allopurinol	11	suppressed
Cephalexin	Cephalexin	11	suppressed
Montelukast Sodium	Montelukast Sodium	11	suppressed
Nystatin	Nystatin	11	suppressed
Tizanidine Hcl	Tizanidine Hcl	11	suppressed

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.

Year	General Payments	Main payer	Explicit products	Company overlaps	Part D coverage
2025	—	—	—	—	—
2024	—	—	—	—	Complete

Questions to ask

Questions you could discuss with your doctor

Are there reasonable alternatives I should understand when we discuss treatment options?
How should I interpret the industry-payment records shown here in the context of my care?

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

Sources and limitations

How to read this page

Payment and Medicare prescribing data can cover different years; every comparison shows both years explicitly.
Part D does not represent a doctor’s entire practice; it excludes many patients and is subject to CMS public-release thresholds.
Company–drug relationships must have an auditable source, a precise relationship type, and a valid evidence period. Unresolved mappings are not published.
Generic drug claims are not attributed to a specific manufacturer without manufacturer-level evidence.
When a source extract is incomplete, missing rows are never treated as proof of no payments or no prescriptions.

Loaded source releases

Dataset	Year	Publication	Source
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