Jean Dorthy Hermsen, DO
Otolaryngology Physician · Ames, IA
Jean Dorthy Hermsen, DO is an otolaryngology physician with a practice address in Ames, Iowa, and NPI 1356540884, issued on Jul 14, 2007. Check the license (Iowa 04309, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Jean Dorthy Hermsen
- Credential
- DO
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License numbers
- 04309 IA
4309 IA
5101017240 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1215 Duff Avenue, Ames, IA 50010
- Phone
- (515) 239-4480
- Enumerated
- Jul 14, 2007
- Record last updated
- Nov 13, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (515) 239-4716
- Medicare enrollment
- Enrolled (PECOS I20120919000847); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 145 in Iowa → Look up another NPI →
Also registered at 1215 Duff Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Austin Bancroft, DOOtolaryngology Physician1699937045
- Shauna Basener, DOInternal Medicine Physician1902060759
- Renald Bernard, M.D.Vascular Surgery Physician1992792907
- Susan Burham, CNMAdvanced Practice Midwife1942254958
- Kristy Calland, DOInternal Medicine Physician1588939631
- Arthur Chen, MDOtolaryngology Physician1598970220
Verify Jean Dorthy Hermsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 04309Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average otolaryngology physician in 2024
268 Medicare Part D claims for 98 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. 19 claims were for opioids.
Most prescribed
- Montelukast Sodium26 claims
- Omeprazole25 claims
- Prednisone18 claims
- Ipratropium Bromide17 claims
- Azelastine Hcl16 claims
- Hydrocodone-Acetaminophen15 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
- Mcfarland Clinic PCAmes, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jean Dorthy Hermsen among 145 otolaryngology physician records in Iowa
Jean Dorthy Hermsen, DO is one of 145 otolaryngology physician records with a practice address in Iowa. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 50% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2007 · median 2005 among the 75 with a school on file
- Record last updated2020 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in Iowa
There are 145 otolaryngology physician records in Iowa.
All 145 in Iowa → Every provider in Ames → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Austin Bancroft, DOAmes, IA 500101699937045
- Arthur Chen, MDAmes, IA 500101598970220
- Thomas Smith, M.D.Ames, IA 500101801877204
- Charles Jons, M.D.Ames, IA 500141770835563
- Joseph Whitman, DOGrinnell, IA 501121336548346
- Heidi Close, MDPella, IA 502191902864903
- Stephen Griffith, M.D.West Des Moines, IA 502651790773679
- Arun Gupta, DO, MPHWest Des Moines, IA 502651619382835
Common questions
What is Jean Dorthy Hermsen, DO's NPI number?
Jean Dorthy Hermsen, DO's National Provider Identifier (NPI) is 1356540884, issued on Jul 14, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jean Dorthy Hermsen, DO located?
The NPPES record lists a practice address at 1215 Duff Avenue, Ames, IA, 50010. Phone: (515) 239-4480. Providers update this record themselves, so call before visiting.
How can I verify Jean Dorthy Hermsen, DO's license?
NPPES lists Iowa license number 04309, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jean Dorthy Hermsen, DO prescribe under Medicare Part D?
In 2024, Jean Dorthy Hermsen, DO had 268 Medicare Part D claims for 98 beneficiaries; the average among otolaryngology physician prescribers was 541. 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.