ARCHES, LLC
ARCHES, LLC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003684218, based in Stamford, CT. It is classified under Mental Health Clinic/Center (Including Community Mental Health Center).
Getting there
Here is what surrounds this office in Stamford, based on OpenStreetMap data collected Oct 14, 2026. Parking is available about 446 ft away.
Getting here and what is nearby
Parking 24 ft ~1 min
Parking 422 ft ~2 min
Parking 446 ft ~2 min
Restaurant The Waters Edge at Giovanni's 798 ft ~4 min
Restaurant Stamford Pizza 0.27 mi ~6 min
Gas station Gulf 0.31 mi ~7 min
Restaurant McDonald's 0.36 mi ~8 min
1103 East Main Street, Stamford 06901
06:00-23:00
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 Mental Health (Including Community Mental Health Center) covers
Definition to come... NUCC Health Care Provider Taxonomy, code 261QM0801X
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003684218 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Dec 18, 2023 |
| Last updated | Dec 18, 2023 |
| Status | Active |
| Practice address |
1266 E MAIN ST #700R Stamford, CT 06902 (646) 761-9661 |
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 | 6 | 8 | 4 | 2 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 3 | 8 | 8 | 2 | 2 |
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.