Amber Marzen, ARNP
Family Nurse Practitioner · Sheffield, IA
Amber Marzen, ARNP is a family nurse practitioner with a practice address in Sheffield, Iowa, and NPI 1902577331, issued on Sep 24, 2021. Check the license (Iowa A165787, as entered in NPPES) with the Iowa board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Amber Marzen
- Credential
- ARNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- A165787 IA
Self-reported in NPPES; status is on the state search - Practice location
- 203 S 2ND St, Sheffield, IA 50475
- Phone
- (641) 892-4495
- Enumerated
- Sep 24, 2021
- Record last updated
- Jul 15, 2025
- Fax
- (641) 892-4278
- Medicare enrollment
- Enrolled (PECOS I20211203001737); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 1,971 in Iowa → Look up another NPI →
Also registered at 203 S 2ND St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joy MoretzMedical Physician Assistant1629162581
- Anna Toomsen, ARNPFamily Nurse Practitioner1619326543
Verify Amber Marzen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Iowa board licenses this profession
Search for license A165787Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average family nurse practitioner in 2024
1,354 Medicare Part D claims for 159 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. 42 claims were for opioids.
Most prescribed
- Atorvastatin Calcium74 claims
- Lisinopril61 claims
- Levothyroxine Sodium49 claims
- Losartan Potassium46 claims
- Omeprazole45 claims
- Sertraline Hcl45 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: $41.47
3 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 99,489 providers of this specialty with any payment received $650.95 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
- North Iowa Mercy ClinicsMason City, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Amber Marzen among 1,971 family nurse practitioner records in Iowa
Amber Marzen, ARNP is one of 1,971 family nurse practitioner records with a practice address in Iowa. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 67% of them.
- NPI issued2021 · 67% of these records are older, 25% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2021 · median 2018 among the 1,398 with a school on file
- Record last updated2025 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Nurse Practitioner providers in Iowa
There are 1,971 family nurse practitioner records in Iowa.
The 8 family nurse practitioner records with the nearest ZIP codes
- Anna Toomsen, ARNPSheffield, IA 504751619326543
- Jennifer Neumann, DNPSaint Ansgar, IA 504721598024655
- Callie White, ARNPSaint Ansgar, IA 504721558825190
- Alicia O'Neill, ARNPRockwell, IA 504691306515093
- Bethany Grant, ARNPRockford, IA 504681831601335
- Kimberly Kuehner, ARNPRockford, IA 504681699251223
- Mary Shaw, ARNPRockford, IA 504681699389882
- Julie Potter, APRNOsage, IA 504611083751028
Common questions
What is Amber Marzen, ARNP's NPI number?
Amber Marzen, ARNP's National Provider Identifier (NPI) is 1902577331, issued on Sep 24, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Amber Marzen, ARNP located?
The NPPES record lists a practice address at 203 S 2ND St, Sheffield, IA, 50475. Phone: (641) 892-4495. Providers update this record themselves, so call before visiting.
How can I verify Amber Marzen, ARNP's license?
NPPES lists Iowa license number A165787, as entered by the provider. Search the Iowa board that licenses this profession; the NPPES record confirms identity only.
How much does Amber Marzen, ARNP prescribe under Medicare Part D?
In 2024, Amber Marzen, ARNP had 1,354 Medicare Part D claims for 159 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.