Katherine Dishner
Katherine Dishner is a Hearing Instrument Specialist in El Cajon, CA, registered under NPI 1003283961.
Getting there
Here is what surrounds this office in El Cajon, based on OpenStreetMap data collected Sep 16, 2026. Parking is available about 0.25 mi away at Broadway Plaza Centre. The nearest transit stop is 0.28 mi away. If you arrive early, there is a coffee shop 0.33 mi away.
Getting here and what is nearby
Restaurant Arby's 115 ft ~1 min
777 Broadway
Parking 151 ft ~1 min
Transit 275 ft ~2 min
Parking 244 ft ~1 min
Restaurant Wendy's 370 ft ~2 min
Gas station 76 465 ft ~2 min
Transit 571 ft ~3 min
Gas station Arco 711 ft ~3 min
900 Broadway
Restaurant Subway 741 ft ~3 min
Grocery Ol' Rodeo's Market 776 ft ~3 min
Parking Broadway Plaza Centre 0.25 mi ~6 min
423 Broadway
Transit 0.28 mi ~6 min
Coffee Starbucks 0.28 mi ~6 min
691 North Mollison Avenue, El Cajon 92021
Hotel Best Western Continental Inn 0.28 mi ~6 min
Grocery Food 4 Less 0.29 mi ~6 min
444 Broadway
Hotel Days Inn El Cajon 0.32 mi ~7 min
Coffee Starbucks 0.33 mi ~7 min
Convenience Kwik Trip 0.36 mi ~8 min
Hotel Econo Lodge Inn & Suites El Cajon San Diego East 0.37 mi ~8 min
588 North Mollison Avenue, El Cajon 92021
Gas station Arco 0.41 mi ~9 min
201 Broadway
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 2101002141 | VA | Hearing Instrument Specialist primary |
This provider holds licence 2101002141 issued in VA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Hearing Instrument Specialist covers
Individuals who test hearing for the selection, adaptation, fitting, adjusting, servicing, and sale of hearing aids. Hearing Instrument Specialist is a designation provided individuals who qualify by the National Hearing Aid Society NUCC Health Care Provider Taxonomy, code 237700000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003283961 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 27, 2015 |
| Last updated | Mar 9, 2021 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Practice address |
761 BROADWAY El Cajon, CA 92021 (619) 441-0916 Fax (619) 441-0968 |
| Mailing address |
750 N COMMONS DR STE 200 Aurora, IL 60504 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 2 | 8 | 3 | 9 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 8 | 6 | 9 | 3 |
Sum = 59 · next multiple of 10 = 60 · check digit = 1 · actual last digit = 1
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.