Brian Osterman
Brian Osterman is a Hearing Instrument Specialist in Chesterfield, MI, registered under NPI 1003369406.
Getting there
Here is what surrounds this office in Chesterfield, based on OpenStreetMap data collected Sep 21, 2026. Parking is available about 0.30 mi away. The nearest transit stop is 693 ft away, served by Gratiot / Twenty-Three Mile (NB). A pharmacy sits 649 ft from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.23 mi away.
Getting here and what is nearby
Restaurant LongHorn Steakhouse 239 ft ~1 min
Parking 358 ft ~2 min
Transit Gratiot / Twenty-Three Mile NS (SB) 412 ft ~2 min
Convenience Meijer 436 ft ~2 min
51095 Gratiot Avenue, Chesterfield 48051
Gas station Meijer 442 ft ~2 min
51095 Gratiot Avenue, Chesterfield 48051
Transit Chesterfield Meijer Park & Ride 514 ft ~2 min
Pharmacy Walgreens 649 ft ~3 min
51008 Gratiot Avenue, Chesterfield 48051
Transit Gratiot / Twenty-Three Mile (NB) 693 ft ~3 min
Restaurant Dolly's Pizza 694 ft ~3 min
Parking 741 ft ~3 min
Coffee Tim Hortons 894 ft ~4 min
51595 Gratiot Avenue, Chesterfield 48051-2009
Mo-We 07:00-20:00; Fr-Sa 07:00-20:00
Convenience Sunoco 945 ft ~4 min
27925 23 Mile Road, Chesterfield 48051
Gas station Sunoco 988 ft ~4 min
27925 23 Mile Road, Chesterfield 48051
Restaurant Panda Express 996 ft ~4 min
50972 Gratiot Avenue, Chesterfield 48051
Mo-Th 10:00-21:00; Fr-Sa 10:00-21:30; Su 10:00-21:00
Grocery Gordon Food Service 0.20 mi ~4 min
51630 Gratiot Avenue, Chesterfield 48051
Grocery Meijer 0.21 mi ~5 min
Convenience Kosto And Alfred 0.22 mi ~5 min
50901 Gratiot Avenue, Chesterfield 48051
Gas station Marathon 0.22 mi ~5 min
50901 Gratiot Avenue, Chesterfield 48051
Coffee Starbucks 0.23 mi ~5 min
Parking 0.30 mi ~6 min
Grocery ALDI 0.39 mi ~8 min
50700 Waterside Drive, Chesterfield 48051
Mo, We, Fr-Su 09:00-20:00, Tu, Th 08:30-20:00
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 |
|---|---|---|
| 3501005697 | MI | Hearing Instrument Specialist primary |
This provider holds licence 3501005697 issued in MI. 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 | 1003369406 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 2, 2016 |
| Last updated | Aug 2, 2016 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Practice address |
51309 GRATIOT AVE Chesterfield, MI 48051 (586) 948-4800 |
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 | 3 | 6 | 9 | 4 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 6 | 9 | 4 | 0 |
Sum = 54 · next multiple of 10 = 60 · check digit = 6 · actual last digit = 6
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.