Tammy Harrelson, APRN-CNP
Tammy Harrelson, APRN-CNP is a Family Nurse Practitioner in Oklahoma City, OK, registered under NPI 1003045501.
Getting there
Here is what surrounds this office in Oklahoma City, based on OpenStreetMap data collected Sep 1, 2026. Parking is available about 0.33 mi away. There is EV charging 0.37 mi from the office (Oklahoma City Supercharger) — useful if you are driving in from out of town.
Getting here and what is nearby
Restaurant Chili's 695 ft ~3 min
3601 West Memorial Road, Oklahoma City 73134
Restaurant Sonic 977 ft ~4 min
3701 West Memorial Road, Oklahoma City 73134
Mo-Fr 06:00-22:00; Sa 08:00-22:00; Su 09:00-21:00
Parking 0.27 mi ~6 min
Hotel Country Inn & Suites 0.32 mi ~7 min
Parking 0.32 mi ~7 min
Parking 0.33 mi ~7 min
Gas station Rudy's 0.34 mi ~7 min
Restaurant Rudy's Country Store and Bar-B-Q 0.34 mi ~7 min
3437 West Memorial Road, Oklahoma City 73134
Mo-Su 07:00-21:00
EV charging Oklahoma City Supercharger 0.37 mi ~8 min
Hotel Holiday Inn Express & Suites 0.37 mi ~8 min
3520 Northwest 135th Street, Oklahoma City 73120
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 |
|---|---|---|
| F0609168 | OK | Family Nurse Practitioner primary |
This provider holds licence F0609168 issued in OK. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Nurse Practitioner
- PAC ID
- 1254487663
- Enrollment ID
- I20090925000167
Medicare enrolment is recorded as approved under the provider type Practitioner - Nurse Practitioner. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
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 | 1003045501 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 7, 2009 |
| Last updated | Jun 19, 2013 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | APRN-CNP |
| Practice address |
14000 N PORTLAND AVE SUITE 201 Oklahoma City, OK 73134 (405) 606-2727 Fax (405) 606-7040 |
| Mailing address |
8121 NATIONAL AVE SUITE 206 Midwest City, OK 73110 |
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 | 0 | 4 | 5 | 5 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 4 | 1 | 5 | 0 |
Sum = 39 · next multiple of 10 = 40 · 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.