Healthcare provider profile · identity verified

Carla J Springer, M.D.

Family Practice · WATERLOO, IA · NPI 1356382923

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
Rosuvastatin Calcium	Rosuvastatin Calcium	801	214
Atorvastatin Calcium	Atorvastatin Calcium	556	145
Amlodipine Besylate	Amlodipine Besylate	391	107
Lisinopril	Lisinopril	389	106
Omeprazole	Omeprazole	360	102
Levothyroxine Sodium	Levothyroxine Sodium	294	76
Pantoprazole Sodium	Pantoprazole Sodium	260	63
Hydrochlorothiazide	Hydrochlorothiazide	233	57
Warfarin Sodium	Warfarin Sodium	220	27
Metoprolol Tartrate	Metoprolol Tartrate	213	54
Gabapentin	Gabapentin	212	57
Fluticasone Propionate	Fluticasone Propionate	196	59
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	196	37
Metoprolol Succinate	Metoprolol Succinate	194	49
Losartan Potassium	Losartan Potassium	179	52
Ozempic	Semaglutide	175	28
Repatha Sureclick	Evolocumab	173	18
Tizanidine Hcl	Tizanidine Hcl	166	66
Fenofibrate	Fenofibrate	151	39
Montelukast Sodium	Montelukast Sodium	144	41
Metformin Hcl	Metformin Hcl	141	37
Sertraline Hcl	Sertraline Hcl	140	40
Albuterol Sulfate Hfa	Albuterol Sulfate	139	64
Furosemide	Furosemide	139	41
Potassium Chloride	Potassium Chloride	132	29
Lorazepam	Lorazepam	111	29
Mounjaro	Tirzepatide	102	20
Tamsulosin Hcl	Tamsulosin Hcl	101	23
Prednisone	Prednisone	96	64
Hydralazine Hcl	Hydralazine Hcl	92	29
Ropinirole Hcl	Ropinirole Hcl	86	17
Breo Ellipta	Fluticasone/Vilanterol	84	18
Clopidogrel	Clopidogrel Bisulfate	83	22
Zolpidem Tartrate	Zolpidem Tartrate	81	21
Atenolol	Atenolol	76	18
Azithromycin	Azithromycin	75	64
Ezetimibe	Ezetimibe	74	27
Glipizide Er	Glipizide	74	16
Venlafaxine Hcl Er	Venlafaxine Hcl	74	18
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	69	15
Clonazepam	Clonazepam	67	12
Allopurinol	Allopurinol	66	14
Isosorbide Mononitrate Er	Isosorbide Mononitrate	62	17
Pravastatin Sodium	Pravastatin Sodium	62	18
Trazodone Hcl	Trazodone Hcl	58	17
Glipizide	Glipizide	57	16
Ibuprofen	Ibuprofen	56	23
Praluent Pen	Alirocumab	56	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	55	14
Tramadol Hcl	Tramadol Hcl	53	16
Eliquis	Apixaban	52	13
Azelastine Hcl	Azelastine Hcl	51	17
Buspirone Hcl	Buspirone Hcl	49	13
Carvedilol	Carvedilol	47	suppressed
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	46	20
Celecoxib	Celecoxib	45	suppressed
Xarelto	Rivaroxaban	42	11
Famotidine	Famotidine	41	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	41	12
Fluoxetine Hcl	Fluoxetine Hcl	40	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	39	12
Bupropion Xl	Bupropion Hcl	37	suppressed
Citalopram Hbr	Citalopram Hydrobromide	37	suppressed
Terazosin Hcl	Terazosin Hcl	37	suppressed
Duloxetine Hcl	Duloxetine Hcl	36	suppressed
Valacyclovir	Valacyclovir Hcl	36	15
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	33	11
Chlorthalidone	Chlorthalidone	30	suppressed
Diclofenac Sodium	Diclofenac Sodium	30	suppressed
Spiriva Handihaler	Tiotropium Bromide	30	suppressed
Donepezil Hcl	Donepezil Hcl	28	suppressed
Metformin Hcl Er	Metformin Hcl	28	suppressed
Clonidine Hcl	Clonidine Hcl	26	suppressed
Lovastatin	Lovastatin	26	suppressed
Premarin	Estrogens, Conjugated	26	suppressed
Spironolactone	Spironolactone	26	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	25	23
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	25	suppressed
Rizatriptan	Rizatriptan Benzoate	25	suppressed
Finasteride	Finasteride	24	suppressed
Irbesartan	Irbesartan	24	suppressed
Cephalexin	Cephalexin	23	19
Incruse Ellipta	Umeclidinium Bromide	22	suppressed
Synthroid	Levothyroxine Sodium	22	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	21	suppressed
Myrbetriq	Mirabegron	21	suppressed
Enalapril Maleate	Enalapril Maleate	20	suppressed
Levofloxacin	Levofloxacin	20	17
Alprazolam	Alprazolam	19	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	19	suppressed
Simvastatin	Simvastatin	19	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	18	16
Baclofen	Baclofen	18	suppressed
Klor-Con M20	Potassium Chloride	18	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	18	suppressed
Estradiol	Estradiol	17	suppressed
Paroxetine Hcl	Paroxetine Hcl	17	suppressed
Temazepam	Temazepam	17	suppressed
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	17	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	17	suppressed
Nitroglycerin	Nitroglycerin	16	suppressed
Pregabalin	Pregabalin	16	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	16	13
Gemfibrozil	Gemfibrozil	15	suppressed
Amoxicillin	Amoxicillin	14	suppressed
Humalog Kwikpen U-100	Insulin Lispro	14	suppressed
Meloxicam	Meloxicam	14	suppressed
Zolpidem Tartrate Er	Zolpidem Tartrate	14	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	13	suppressed
Novolog Flexpen	Insulin Aspart	13	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	13	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	13	suppressed
Acebutolol Hcl	Acebutolol Hcl	12	suppressed
Bupropion Hcl Sr	Bupropion Hcl	12	suppressed
Hydroxyzine Pamoate	Hydroxyzine Pamoate	12	suppressed
Alendronate Sodium	Alendronate Sodium	11	suppressed
Budesonide Er	Budesonide	11	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	11	suppressed
Dexamethasone	Dexamethasone	11	11
Enoxaparin Sodium	Enoxaparin Sodium	11	suppressed
Klor-Con M10	Potassium Chloride	11	suppressed
Medroxyprogesterone Acetate	Medroxyprogesterone Acetate	11	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	11	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	11	suppressed
Nifedipine Er	Nifedipine	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