Deborah Keefer, RN
Deborah Keefer, RN is an Addiction (Substance Use Disorder) Registered Nurse in Madison, WI, registered under NPI 1003638701.
Getting there
Here is what surrounds this office in Madison, based on OpenStreetMap data collected Oct 8, 2026. Parking is available about 236 ft away. The nearest transit stop is 1,021 ft away, served by John Nolen & E Olin (SB).
Getting here and what is nearby
Transit E Olin & Quann (EB) 68 ft ~1 min
Parking 62 ft ~1 min
Parking 216 ft ~1 min
Parking 236 ft ~1 min
Restaurant The Wonder Bar 223 ft ~1 min
Transit John Nolen & E Olin (NB) 703 ft ~3 min
Transit John Nolen & E Olin (SB) 1,021 ft ~4 min
Hotel Holiday Inn Express & Suites 0.33 mi ~7 min
Hotel Madison Marriott South 0.49 mi ~10 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 |
|---|---|---|
| 109359 | WI | Addiction (Substance Use Disorder)… primary |
This provider holds licence 109359 issued in WI. 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 Addiction (Substance Use Disorder) covers
Definition to come... NUCC Health Care Provider Taxonomy, code 163WA0400X
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 | 1003638701 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 25, 2024 |
| Last updated | Oct 25, 2024 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | RN |
| Practice address |
210 E OLIN AVE Madison, WI 53713 (608) 807-1428 |
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 | 6 | 3 | 8 | 7 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 3 | 3 | 7 | 7 | 0 |
Sum = 49 · next multiple of 10 = 50 · 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.