Mackenzie Mcclellan, TLLP
Mackenzie Mcclellan, TLLP is a Clinical Psychologist in Warren, MI, registered under NPI 1003453200.
Getting there
Here is what surrounds this office in Warren, based on OpenStreetMap data collected Sep 18, 2026. Parking is available about 1,024 ft away. The nearest transit stop is 653 ft away, served by Old 13 Mile / Georgetown (EB).
Getting here and what is nearby
Transit Old 13 Mile / Van Dyke NS (WB) 431 ft ~2 min
Restaurant Buddy's Pizza 435 ft ~2 min
8100 Old 13 Mile Road, Warren 48093
Mo-Th 11:00-21:00; Fr-Sa 11:00-22:00; Su 12:00-21:00
Transit Old 13 Mile / Van Dyke (EB) 485 ft ~2 min
Parking 449 ft ~2 min
Convenience Mobil Mart 585 ft ~3 min
Transit Old 13 Mile / Georgetown (EB) 653 ft ~3 min
Gas station Mobil 650 ft ~3 min
Parking 711 ft ~3 min
Restaurant Som Jai Thai Cuisine 890 ft ~4 min
8397 Old 13 Mile Road, 48093
Tu-Fr 11:00-21:00; Sa 12:00-21:00; Su 13:00-21:00
Parking 1,024 ft ~4 min
Restaurant Olive Garden 1,027 ft ~4 min
30600 Van Dyke Avenue, Warren 48093
Convenience Saroki's Crispy Chicken & Pizza 0.25 mi ~6 min
8701 East 13 Mile Road, Warren 48093
Mo-Th 10:00-21:00; Fr-Sa 10:00-22:00; Su 11:00-21:00
Gas station Shell 0.27 mi ~6 min
8701 East 13 Mile Road, Warren 48093
Hotel TownePlace Suites Detroit Warren 0.33 mi ~7 min
Hotel Courtyard Detroit Warren 0.37 mi ~8 min
Hotel Sonesta ES Suites Detroit Warren 0.45 mi ~9 min
30120 North Civic Center Drive, Warren 48093
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 |
|---|---|---|
| 6301018169 | MI | Clinical Psychologist primary |
This provider holds licence 6301018169 issued in MI. 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 Clinical covers
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems. NUCC Health Care Provider Taxonomy, code 103TC0700X
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 | 1003453200 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 6, 2019 |
| Last updated | Dec 6, 2019 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | TLLP |
| Practice address |
8150 E 13 MILE RD Warren, MI 48093 (586) 825-9700 |
| Mailing address |
6549 TOWN CENTER DR STE A Clarkston, MI 48346 |
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 | 5 | 3 | 2 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 5 | 6 | 2 | 0 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
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.