Harry Davis
Harry Davis is a Hearing Instrument Specialist in Chicago, IL, registered under NPI 1003056789.
Getting there
Here is what surrounds this office in Chicago, based on OpenStreetMap data collected Sep 3, 2026. Parking is available about 0.22 mi away at Theater District Self Park. There is EV charging 0.41 mi from the office (Tesla Supercharger) — useful if you are driving in from out of town. The nearest transit stop is 303 ft away, served by State & Washington. A pharmacy sits 537 ft from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 554 ft away.
Getting here and what is nearby
Transit Washington & State 178 ft ~1 min
Convenience Circle K 218 ft ~1 min
Restaurant Dunkin' 189 ft ~1 min
6 North Wabash Avenue, Chicago 60602
Mo-Fr 05:30-17:30; Sa 06:00-17:30; Su 06:00-16:00
Restaurant Oasis Cafe 209 ft ~1 min
21 North Wabash Avenue, Chicago 60602
Mo-Fr 10:00-17:30; Sa 11:00-16:00
Restaurant Tropical Smoothie Cafe 219 ft ~1 min
Transit Washington & Wabash (CTA) 300 ft ~2 min
Transit State & Washington 303 ft ~2 min
Coffee Pittsfield Cafe 315 ft ~2 min
Coffee Hanabusa 326 ft ~2 min
Hotel Staypineapple, An Iconic Hotel, The Loop 430 ft ~2 min
1 West Washington Street, Chicago 60602
Hotel Silversmith Hotel Chicago Downtown 431 ft ~2 min
Pharmacy CVS Pharmacy 454 ft ~2 min
1 South State Street, Chicago 60603
Pharmacy Walgreens 471 ft ~2 min
2 North State Street, Chicago 60602
Mo-Fr 06:30-22:00; Sa,Su 08:00-22:00
Coffee Starbucks 554 ft ~3 min
Pharmacy Walgreens 537 ft ~3 min
30 North Michigan Avenue, Chicago 60602
Mo-Fr 07:00-22:00; Sa-Su 08:00-22:00
Hotel Chicago Athletic Association Hotel 626 ft ~3 min
Parking Wabash-Randolph Parking Garage 734 ft ~3 min
20-32 East Randolph Street, Chicago 60601
Parking Grant Park North Garage 823 ft ~4 min
Convenience 7-Eleven 0.22 mi ~5 min
Convenience Chitown Food & Deli 0.22 mi ~5 min
30 East Adams Street, Chicago 60603
Parking Theater District Self Park 0.22 mi ~5 min
181 North Dearborn Street, Chicago 60601
Grocery Bockwinkel's 0.35 mi ~8 min
222 North Columbus Drive, Chicago 60601
Mo-Su 08:00-23:00
EV charging Tesla Supercharger 0.41 mi ~9 min
Grocery Mariano's Fresh Market 0.43 mi ~9 min
Gas station BP 0.50 mi ~11 min
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 |
|---|---|---|
| 1542 | NC | Hearing Instrument Specialist primary |
This provider holds licence 1542 issued in NC. 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
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 237700000X | Hearing Instrument Specialist | — | MO | |
| 237700000X | Hearing Instrument Specialist | 1542 | NC | primary |
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 | 1003056789 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 20, 2009 |
| Last updated | Apr 25, 2018 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Practice address |
25 E WASHINGTON ST STE 1817 Chicago, IL 60602 (636) 397-6966 Fax (636) 397-6836 |
| Mailing address |
2300 N HERRITAGE ST Kinston, NC 28501 |
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 | 0 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 5 | 3 | 7 | 7 |
Sum = 51 · next multiple of 10 = 60 · check digit = 9 · actual last digit = 9
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.