Calvin Trepp, HIS
Hearing Instrument Specialist · Mason City, IA
Calvin Trepp, HIS is a hearing instrument specialist with a practice address in Mason City, Iowa, and NPI 1295136091, issued on Sep 11, 2014. Check the license (Iowa 0940, as entered in NPPES) with the Iowa board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Calvin Trepp
- Credential
- HIS
- Primary taxonomy
- Hearing Instrument Specialist 237700000X
- License number
- 0940 IA
Self-reported in NPPES; status is on the state search - Practice location
- 422 S Pierce Ave, Mason City, IA 50401
- Phone
- (641) 424-6769
- Enumerated
- Sep 11, 2014
- Record last updated
- Sep 11, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (641) 424-6774
- Entity
- Type 1 · individual
8 nearest hearing instrument specialist records → All 197 in Iowa → Look up another NPI →
Also registered at 422 S Pierce Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Korthals, O.D.Optometrist1407880883
Verify Calvin Trepp in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Iowa board licenses this profession
Search for license 0940Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Calvin Trepp among 197 hearing instrument specialist records in Iowa
Calvin Trepp, HIS is one of 197 hearing instrument specialist records with a practice address in Iowa. 0% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2014, is newer than 39% of them.
- NPI issued2014 · 39% of these records are older, 57% newer
- In a Medicare fileNo · 0% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2014 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 237700000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hearing Instrument Specialist providers in Iowa
There are 197 hearing instrument specialist records in Iowa. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 197 in Iowa → Every provider in Mason City → Hearing Instrument Specialist nationwide →
The 8 hearing instrument specialist records with the nearest ZIP codes
- Jeff ArendsMason City, IA 504011578406161
- Matthew BullMason City, IA 504011386988046
- Bonnie Burnett, FMason City, IA 504011538672985
- Richard ConnorMason City, IA 504011013251784
- Becky LindamanMason City, IA 504011932503273
- Peggy Stephens, BC HISMason City, IA 504011114076528
- David ValleryMason City, IA 504011407211998
- Eric Smargiasso, NBC, HISPleasant Hill, IA 503271770129041
Common questions
What is Calvin Trepp, HIS's NPI number?
Calvin Trepp, HIS's National Provider Identifier (NPI) is 1295136091, issued on Sep 11, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Calvin Trepp, HIS located?
The NPPES record lists a practice address at 422 S Pierce Ave, Mason City, IA, 50401. Phone: (641) 424-6769. Providers update this record themselves, so call before visiting.
How can I verify Calvin Trepp, HIS's license?
NPPES lists Iowa license number 0940, as entered by the provider. Search the Iowa board that licenses this profession; the NPPES record confirms identity 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. 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.