Marcia Harrison
Marcia Harrison is an Addiction (Substance Use Disorder) Counselor in Anchorage, AK, registered under NPI 1003695867.
Getting there
Here is what surrounds this office in Anchorage, based on OpenStreetMap data collected Oct 16, 2026. Parking is available about 230 ft away. The nearest transit stop is 0.25 mi away, served by Benson & Arctic ESE. If you arrive early, there is a coffee shop 0.48 mi away.
Getting here and what is nearby
Parking 141 ft ~1 min
Parking 206 ft ~1 min
Parking 230 ft ~1 min
Coffee Fromaggio's 674 ft ~3 min
Mo-Fr 10:30-18:00; Sa 09:30-17:00
Transit 752 ft ~3 min
Coffee Sweet Caribou 811 ft ~4 min
Transit 1,002 ft ~4 min
Hotel Qupqugiaq Inn 0.22 mi ~5 min
Transit Benson & Arctic ESE 0.25 mi ~6 min
Restaurant McDonald's 0.29 mi ~6 min
Restaurant Tommy’s Burger Stop 0.30 mi ~6 min
1106 West 29th Place, Anchorage 99503
Mo-Su 10:30-21:00
Restaurant Pancho's Villa 0.30 mi ~6 min
Convenience Holiday 0.36 mi ~8 min
Hotel Aloft Anchorage 0.39 mi ~8 min
310 West 36th Avenue, Anchorage 99503
Grocery The New Central Market 0.39 mi ~8 min
Coffee Aftershock Espresso LLC 0.48 mi ~10 min
3201 Minnesota Drive, Anchorage 99503
Mo-Sa 06:00-20:00; Su 07:00-19:00
Hotel La Quinta 0.48 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
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
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 101YA0400X
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 | 1003695867 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 21, 2023 |
| Last updated | Sep 21, 2023 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Practice address |
3330 ARCTIC BLVD STE 101 Anchorage, AK 99503 (342) 590-7600 |
| Mailing address |
2600 CORDOVA ST STE 101 Anchorage, AK 99503 |
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 | 9 | 5 | 8 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 3 | 9 | 1 | 8 | 3 |
Sum = 53 · next multiple of 10 = 60 · check digit = 7 · actual last digit = 7
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.