Jean L. Westendorf, ARNP
Nurse Practitioner · Mason City, IA
Jean L. Westendorf, ARNP is a nurse practitioner with a practice address in Mason City, Iowa, and NPI 1083609929, issued on Sep 16, 2005. Check the license (Iowa 039850, as entered in NPPES) with the Iowa board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Jean L. Westendorf
- Credential
- ARNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License numbers
- 039850 IA
C039850 IA
Self-reported in NPPES; status is on the state search - Practice location
- 621 S Illinois Ave, Mason City, IA 50401
- Phone
- (641) 428-6900
- Enumerated
- Sep 16, 2005
- Record last updated
- Jul 9, 2025
- Fax
- (641) 428-6909
- Medicaid ID
- 0425017 IA
- Medicare enrollment
- Enrolled (PECOS I20110331000351); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 1,294 in Iowa → Look up another NPI →
Also registered at 621 S Illinois Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jean L. Westendorf in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Iowa board licenses this profession
Search for license 039850Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average nurse practitioner in 2024
24 Medicare Part D claims, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.
Most prescribed
- Dextroamphetamine-Amphetamine20 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.
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).
Jean L. Westendorf among 1,294 nurse practitioner records in Iowa
Jean L. Westendorf, ARNP is one of 1,294 nurse practitioner records with a practice address in Iowa. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 89% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1973 · median 2018 among the 873 with a school on file
- Record last updated2025 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
28 nurse practitioner records list a practice address in Mason City
They are 28 of the 866 NPPES records with a practice address in Mason City, and 1,294 nurse practitioner records in Iowa.
All 1,294 in Iowa → Every provider in Mason City → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Marie Cole, ARNPMason City, IA 504011487761490
- Rhonda Cooper, ARNPMason City, IA 504011558463539
- Lila Courtney, ARNPMason City, IA 504011225143043
- Sharon Enabnit, ARNPMason City, IA 504011912015181
- Joann Ermer-Seltun, ARNPMason City, IA 504011801998570
- Mitzi Garrison, FNPMason City, IA 504011730150749
- Debra Groath, ARNPMason City, IA 504011265534937
- Linda Schluter, ARNPMason City, IA 504011265540330
Common questions
What is Jean L. Westendorf, ARNP's NPI number?
Jean L. Westendorf, ARNP's National Provider Identifier (NPI) is 1083609929, issued on Sep 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Jean L. Westendorf, ARNP located?
The NPPES record lists a practice address at 621 S Illinois Ave, Mason City, IA, 50401. Phone: (641) 428-6900. Providers update this record themselves, so call before visiting.
How can I verify Jean L. Westendorf, ARNP's license?
NPPES lists Iowa license number 039850, as entered by the provider. Search the Iowa board that licenses this profession; the NPPES record confirms identity only.
How much does Jean L. Westendorf, ARNP prescribe under Medicare Part D?
In 2024, Jean L. Westendorf, ARNP had 24 Medicare Part D claims; 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.