Katherine M. Tjaden, PA-C
Physician Assistant · Ames, IA
Katherine M. Tjaden, PA-C is a physician assistant with a practice address in Ames, Iowa, and NPI 1013974575, issued on Apr 28, 2006. Check the license (Iowa 001576, as entered in NPPES) with the Iowa board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine M. Tjaden
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 001576 IA
Self-reported in NPPES; status is on the state search - Practice location
- 3800 Lincoln Way, Ames, IA 50014
- Phone
- (515) 956-4100
- Enumerated
- Apr 28, 2006
- Record last updated
- Feb 22, 2024
- Fax
- (515) 956-4108
- Medicaid ID
- 0638536 IA
- Medicare enrollment
- Enrolled (PECOS I20040907000831); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 3800 Lincoln Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica GoschPharmacist1194354423
- Tiffany Lichty-Gaffey, PHARMDPharmacist1790804003
- John McClelland, PA-CPhysician Assistant1649267907
- Veronica McGeePharmacist1831719160
- Crystal Morrison, RD, LD, CDERegistered Dietitian1659490845
- Kristie Semrow, O.D.Optometrist1184645111
Verify Katherine M. Tjaden in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Iowa board licenses this profession
Search for license 001576Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average physician assistant in 2024
256 Medicare Part D claims for 171 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Azithromycin35 claims
- Prednisone25 claims
- Cefdinir20 claims
- Amoxicillin-Clavulanate Potass19 claims
- Doxycycline Hyclate18 claims
- Nitrofurantoin Mono-Macro16 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 PCCarroll, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
30 physician assistant records list a practice address in Ames
They are 30 of the 1,249 NPPES records with a practice address in Ames, and 1,525 physician assistant records in Iowa.
All 30 in Ames → All 1,525 in Iowa → Every provider in Ames →
Other physician assistant records in Iowa
- Fady AbawiDavenport, IA1861379224
- Steven AbdoCoralville, IA1780375576
- Leah Abebe, PACouncil Bluffs, IA1053941591
- Timothy Ackarman, PAForest City, IA1447368170
- Parker Acree, PA-CIowa City, IA1760251540
- Grace Adam, PA-CIowa City, IA1962150227
- Grace Adsem, PA-CAnkeny, IA1487456653
- Alexis Ahlberg, PA-CCedar Rapids, IA1396330288
- Madisen Ahlstrom, PA-CDavenport, IA1255021770
- Karen Ajram, PAIowa City, IA1598754442
Common questions
What is Katherine M. Tjaden, PA-C's NPI number?
Katherine M. Tjaden, PA-C's National Provider Identifier (NPI) is 1013974575, issued on Apr 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Katherine M. Tjaden, PA-C located?
The NPPES record lists a practice address at 3800 Lincoln Way, Ames, IA, 50014. Phone: (515) 956-4100. Providers update this record themselves, so call before visiting.
How can I verify Katherine M. Tjaden, PA-C's license?
NPPES lists Iowa license number 001576, as entered by the provider. Search the Iowa board that licenses this profession; the NPPES record confirms identity only.
How much does Katherine M. Tjaden, PA-C prescribe under Medicare Part D?
In 2024, Katherine M. Tjaden, PA-C had 256 Medicare Part D claims for 171 beneficiaries; the average among physician assistant prescribers was 830. 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.