Anna Loiterstein
Anna Loiterstein is a Clinical Child & Adolescent Psychologist in Guilford, CT, registered under NPI 1003282674. 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 Guilford, based on OpenStreetMap data collected Sep 16, 2026. Parking is available about 269 ft away. If you arrive early, there is a coffee shop 0.44 mi away.
Getting here and what is nearby
Parking 60 ft ~1 min
Parking 195 ft ~1 min
Parking 269 ft ~2 min
Restaurant iThai Restaurant 311 ft ~2 min
Gas station Xpress Fuel 682 ft ~3 min
Coffee Pokemoto 0.26 mi ~6 min
Coffee Moonshots Juice Co. 0.27 mi ~6 min
Convenience Phillips 66 0.31 mi ~7 min
Gas station Phillips 66 0.32 mi ~7 min
Restaurant Kamana 0.38 mi ~8 min
Coffee Belle Vie Cafe 0.44 mi ~9 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 Clinical Child & Adolescent covers
A psychologist who develops and applies scientific knowledge to the delivery of psychological services to infants, toddlers, children and adolescents within their social context. Of particular importance to the specialty of clinical child psychology is an understanding of the basic psychological needs of children and adolescents, and how the family and other social contexts influence the socio-emotional adjustment, cognitive development, behavioral adaptation and health status of children and adolescents. NUCC Health Care Provider Taxonomy, code 103TC2200X
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 | 1003282674 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 18, 2015 |
| Last updated | Dec 14, 2020 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Practice address |
34 YORK ST Guilford, CT 06437 (203) 453-2220 |
| Other identifiers |
141397918
· Medicaid (NY) |
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 | 2 | 8 | 2 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 8 | 4 | 6 | 5 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
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.