Karen Marie Sadler, ARNP
Nurse Practitioner · Waterloo, IA
Karen Marie Sadler, ARNP is a nurse practitioner with a practice address in Waterloo, Iowa, and NPI 1891396529, issued on Nov 9, 2020. Check the license (Iowa A161407, as entered in NPPES) with the Iowa board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karen Marie Sadler
- Credential
- ARNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- A161407 IA
Self-reported in NPPES; status is on the state search - Practice location
- 2515 Cyclone Dr Ste B, Waterloo, IA 50701
- Phone
- (319) 888-8044
- Enumerated
- Nov 9, 2020
- Record last updated
- Feb 7, 2022
- Medicare enrollment
- Enrolled (PECOS I20201204000795); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 2515 Cyclone Dr Ste B
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Karen Marie Sadler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Iowa board licenses this profession
Search for license A161407Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% more Medicare Part D claims than the average nurse practitioner in 2024
1,427 Medicare Part D claims for 390 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims.
Most prescribed
- Fluticasone Propionate359 claims
- Montelukast Sodium233 claims
- Azelastine Hcl137 claims
- Ipratropium Bromide109 claims
- Famotidine90 claims
- Ketoconazole85 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $80.42
4 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Peoples Community Health Clinic, Inc.Waterloo, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
96 nurse practitioner records list a practice address in Waterloo
They are 96 of the 1,512 NPPES records with a practice address in Waterloo, and 1,294 nurse practitioner records in Iowa.
All 96 in Waterloo → All 1,294 in Iowa → Every provider in Waterloo →
Other nurse practitioner records in Iowa
- Omar AcevizDavenport, IA1215655568
- Jennifer AchenbachCouncil Bluffs, IA1013967280
- Elizabeth Ackerson, ARNPWaterloo, IA1225485097
- Anece Adam, ARNPIowa City, IA1346814779
- Debra Adams, ARNPFort Dodge, IA1659659324
- Kathleen Adams, ARNPDes Moines, IA1073500690
- Madison Adank, FNP-BCDavenport, IA1376258905
- Lindsey Aeschliman, ARNPWest Des Moines, IA1770866642
- Christina Aguilar, ARNPDes Moines, IA1942768023
- Madison Albert, ARNPWaverly, IA1043945645
Common questions
What is Karen Marie Sadler, ARNP's NPI number?
Karen Marie Sadler, ARNP's National Provider Identifier (NPI) is 1891396529, issued on Nov 9, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Karen Marie Sadler, ARNP located?
The NPPES record lists a practice address at 2515 Cyclone Dr Ste B, Waterloo, IA, 50701. Phone: (319) 888-8044. Providers update this record themselves, so call before visiting.
How can I verify Karen Marie Sadler, ARNP's license?
NPPES lists Iowa license number A161407, as entered by the provider. Search the Iowa board that licenses this profession; the NPPES record confirms identity only.
How much does Karen Marie Sadler, ARNP prescribe under Medicare Part D?
In 2024, Karen Marie Sadler, ARNP had 1,427 Medicare Part D claims for 390 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.