Mary Johnson
Mary Johnson is a Psychiatric/Mental Health Nurse Practitioner in Boulder, CO, registered under NPI 1003493826. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Boulder, based on OpenStreetMap data collected Sep 30, 2026. Parking is available about 0.27 mi away. There is EV charging 0.47 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 627 ft away, served by Arapahoe Ave & 48th St. If you arrive early, there is a coffee shop 0.49 mi away.
Getting here and what is nearby
Parking 89 ft ~1 min
Transit Eisenhower Dr & McKinley Dr 467 ft ~2 min
Parking 489 ft ~2 min
Transit Eisenhower Dr & McKinley Dr 566 ft ~3 min
Transit Arapahoe Ave & 48th St 627 ft ~3 min
Parking 0.27 mi ~6 min
1795 48th Court, Boulder 80301
Restaurant Sherpa Kitchen 0.32 mi ~7 min
Coffee Ozo Coffee Roasters 0.37 mi ~8 min
5340 Arapahoe Avenue, Boulder 80303
Mo-Sa 06:00-18:00; Su 07:00-17:00
EV charging ChargePoint 0.37 mi ~8 min
Restaurant Snarf's 0.38 mi ~8 min
Restaurant Pica's 0.41 mi ~9 min
EV charging 0.47 mi ~10 min
Coffee Violet Peak Aerospace Cafe 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 |
|---|---|---|
| APN.1002166-NP | CO | Psychiatric/Mental Health Nurse… primary |
| 0094898 | CO | Home Health Registered Nurse |
This provider holds licence APN.1002166-NP issued in CO. 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 Psychiatric/Mental Health covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LP0808X
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 | |
|---|---|---|---|---|
| 363LP0808X | Psychiatric/Mental Health Nurse Practitioner Psychiatric/Mental Health | APN.1002166-NP | CO | primary |
| 163WH0200X | Home Health Registered Nurse Home Health | 0094898 | CO |
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 | 1003493826 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 26, 2021 |
| Last updated | Jul 14, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Practice address |
1505 48TH ST Boulder, CO 80303 (303) 506-9439 |
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 | 4 | 9 | 3 | 8 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 9 | 6 | 8 | 4 |
Sum = 64 · next multiple of 10 = 70 · 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.