Marcus Patterson, PSY.D.
Marcus Patterson, PSY.D. is a Clinical Psychologist in Alexandria, VA, registered under NPI 1003354028. 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 Alexandria, based on OpenStreetMap data collected Sep 17, 2026. Parking is available about 0.39 mi away. The nearest transit stop is 476 ft away, served by N Fairfax St + Cameron St. A pharmacy sits 0.21 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.24 mi away.
Getting here and what is nearby
Restaurant Momo Sushi & Cafe 199 ft ~1 min
212 Queen Street, Alexandria 22314
Mo-Sa 11:30-14:30,16:00-21:30; Su 16:00-21:00
Restaurant Elaine's 214 ft ~1 min
208 Queen Street, Alexandria 22314
Mo-Tu off; We-Th 11:00-21:00; Fr-Sa 11:00-22:00; Su 11:00-21:00
Transit N Fairfax St + Princess St 251 ft ~1 min
Restaurant Jack's Place 284 ft ~2 min
222 North Lee Street, Alexandria 22314-2634
Mo-Th 07:00-15:00; Fr 07:00-20:30; Sa-Su 08:00-20:30, Tu off
Transit N Fairfax St + Princess St 339 ft ~2 min
Transit N Fairfax St + Cameron St 476 ft ~2 min
Pharmacy CVS Pharmacy 0.21 mi ~5 min
Coffee FireHook 0.23 mi ~5 min
105 South Union Street, Alexandria 22314
Mo-Fr 6:30-19:00; Sa-Su 7:00-19:00
Coffee Tatte Bakery & Cafe 0.24 mi ~5 min
515 King Street, Alexandria 22314
Mo-Sa 07:00-20:00; Su 08:00-19:00
Coffee Grape + Bean 0.24 mi ~5 min
118 South Royal Street, Alexandria 22314
Tu 11:30-19:00; We-Fr 11:30-22:00; Sa 9:00-22:00; Su 11:30-18:00
Grocery Trader Joe's 0.32 mi ~7 min
612 North Saint Asaph Street, Alexandria 22314
Mo-Su 08:00-21:00
Parking 0.33 mi ~7 min
114 South Washington Street, Alexandria 22314
Hotel Hotel Heron 0.34 mi ~7 min
Hotel Hotel Heron 0.34 mi ~7 min
Parking 0.34 mi ~7 min
101 Duke Street, 22314
Hotel Hotel Indigo Old Town Alexandria 0.35 mi ~8 min
Gas station Exxon 0.39 mi ~8 min
703 North Washington Street, Alexandria 22314
Mo-Su 07:00-21:00
Parking 0.39 mi ~8 min
300 Strand
Grocery Harris Teeter 0.40 mi ~9 min
735 North Saint Asaph Street, Alexandria 22314
24/7
Gas station Liberty 0.41 mi ~9 min
725 North Washington Street, Alexandria 22314
Convenience Ten Thousand Villages 0.44 mi ~9 min
Gas station Shell 0.46 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 |
|---|---|---|
| 0810005630 | VA | Clinical Psychologist primary |
This provider holds licence 0810005630 issued in VA. 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 | 1003354028 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 9, 2017 |
| Last updated | Feb 9, 2017 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | PSY.D. |
| Practice address |
301 N FAIRFAX ST STE 102-B Alexandria, VA 22314 (202) 596-1031 |
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 | 3 | 5 | 4 | 0 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 5 | 8 | 0 | 4 |
Sum = 52 · next multiple of 10 = 60 · check digit = 8 · actual last digit = 8
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.