Mary Walker, NP-C
Mary Walker, NP-C is a Family Nurse Practitioner in Amarillo, TX, registered under NPI 1003121062.
Getting there
Here is what surrounds this office in Amarillo, based on OpenStreetMap data collected Sep 6, 2026. Parking is available about 457 ft away. The nearest transit stop is 870 ft away, served by 1215 S Coulter St (WHA Medical Office Building). A pharmacy sits 0.24 mi from the entrance (King's Compounding Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.22 mi away.
Getting here and what is nearby
Parking 300 ft ~2 min
Transit NWTH & Coulter 447 ft ~2 min
Parking 397 ft ~2 min
Parking 457 ft ~2 min
Transit Texas Tech Hospital & Coulter 562 ft ~3 min
Transit 1215 S Coulter St (WHA Medical Office Building) 870 ft ~4 min
Convenience Toot'n Totum 0.21 mi ~5 min
Coffee Strata Coffee Bar 0.22 mi ~5 min
7560 Outlook Drive, Amarillo 79106
Su 07:00-18:00; Mo-Fr 06:00-19:00; Sa 07:00-19:00
Restaurant Which Wich? 0.22 mi ~5 min
1540 South Coulter Street, Amarillo 79106
Mo-Sa 10:00-20:00
Pharmacy King's Compounding Pharmacy 0.24 mi ~5 min
1600 South Coulter Street, Amarillo 79106
Mo-Fr 09:00-18:00
Hotel Quality Inn 0.33 mi ~7 min
Restaurant Joe Taco 0.39 mi ~8 min
Restaurant Babylon Mediterranean Food Truck 0.50 mi ~10 min
7401 West Amarillo Boulevard, Amarillo 79106
We-Th 11:00-18:00; Fr 21:00-24:00; Sa 12:00-18:00
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 |
|---|---|---|
| 255983 | TX | Family Nurse Practitioner primary |
This provider holds licence 255983 issued in TX. 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 Family covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LF0000X
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 | 1003121062 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 15, 2010 |
| Last updated | Aug 15, 2010 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | NP-C |
| Practice address |
1501 S COULTER ST Amarillo, TX 79106 (806) 351-4152 |
| Mailing address |
6407 BAYBERRY LN Amarillo, TX 79124 |
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 | 1 | 2 | 1 | 0 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 2 | 2 | 0 | 3 |
Sum = 38 · next multiple of 10 = 40 · check digit = 2 · actual last digit = 2
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.