Karin Arndt, PH.D.
Karin Arndt, PH.D. is a Clinical Psychologist in Washington, DC, registered under NPI 1003354648. 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 Washington, based on OpenStreetMap data collected Sep 20, 2026. Parking is available about 431 ft away. There is EV charging 0.44 mi from the office (eVgo) — useful if you are driving in from out of town. The nearest transit stop is 364 ft away, served by Connecticut Ave NW at Chesapeake St NW. A pharmacy sits 0.47 mi from the entrance (Pill Plus Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.43 mi away.
Getting here and what is nearby
Transit Connecticut Ave NW at Brandywine St NW 193 ft ~1 min
Parking 196 ft ~1 min
Transit Connecticut Ave NW at Brandywine St NW 240 ft ~1 min
Parking 324 ft ~2 min
Transit Connecticut Ave NW at Chesapeake St NW 364 ft ~2 min
Parking 431 ft ~2 min
Restaurant Italian Pizza Kitchen 861 ft ~4 min
4483 Connecticut Avenue Northwest, Washington 20008-2329
Restaurant Thai Pad 906 ft ~4 min
4481 Connecticut Avenue Northwest, Washington 20008
Restaurant Malabar 0.20 mi ~4 min
4465 Connecticut Avenue Northwest
Hotel Days Inn 0.21 mi ~5 min
4400 Connecticut Avenue Northwest, Washington 20008
EV charging SemaCharge 0.22 mi ~5 min
Coffee Whale Tea 0.27 mi ~6 min
Grocery Mom's 0.36 mi ~8 min
Gas station Shell 0.37 mi ~8 min
4940 Connecticut Avenue Northwest, Washington 20008
24/7
Pharmacy CVS Pharmacy 0.37 mi ~8 min
Coffee Starbucks 0.39 mi ~8 min
4250 Connecticut Avenue Northwest, Washington 20008
Gas station BP 0.39 mi ~8 min
Grocery Giant 0.41 mi ~9 min
4303 Connecticut Avenue Northwest, Washington 20008
Mo-Su 06:00-22:00
Pharmacy CVS Pharmacy 0.42 mi ~9 min
Coffee The Den Coffeehouse 0.43 mi ~9 min
5015 Connecticut Avenue Northwest, Washington 20008
Mo-Sa 08:00-22:00; Su 08:00-21:00
EV charging eVgo 0.44 mi ~9 min
Convenience Tiger Mart 0.44 mi ~9 min
Gas station Exxon 0.44 mi ~9 min
Pharmacy Pill Plus Pharmacy 0.47 mi ~10 min
4215 Connecticut Avenue Northwest, Washington 20008
Mo-Fr 09:00-18:00; Sa-Su off
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 |
|---|---|---|
| PSY1001193 | DC | Clinical Psychologist primary |
| PS017754 | PA | Clinical Psychologist |
Licences are recorded in 2 states: DC, PA. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
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.
Licensed in 2 states
This provider holds licences in 2 states: District of Columbia and Pennsylvania. The practice address on file is in Washington, DC, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- PSY1001193
- Specialty
- Clinical Psychologist
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
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
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 | |
|---|---|---|---|---|
| 103TC0700X | Clinical Psychologist Clinical | PSY1001193 | DC | primary |
| 103TC0700X | Clinical Psychologist Clinical | PS017754 | PA |
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 | 1003354648 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 2, 2017 |
| Last updated | Feb 2, 2017 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | PH.D. |
| Practice address |
4601 CONNECTICUT AVE NW SUITE 20 Washington, DC 20008 (716) 239-0723 |
| Mailing address |
5 HATHAWAY CT Silver Spring, MD 20906 |
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 | 6 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 5 | 8 | 6 | 8 |
Sum = 62 · next multiple of 10 = 70 · 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.