Gretchen Petersen
Gretchen Petersen is a provider specialising in School Social Worker in West Newton, MA, registered under NPI 1003398561. 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 West Newton, based on OpenStreetMap data collected Sep 24, 2026. Parking is available about 304 ft away. The nearest transit stop is 568 ft away, served by Washington St @ Auburn St. A pharmacy sits 0.43 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.40 mi away.
Getting here and what is nearby
Transit Washington St @ Prospect St 202 ft ~1 min
Transit Washington St @ Prospect St 222 ft ~1 min
Parking 209 ft ~1 min
Parking 213 ft ~1 min
Parking 304 ft ~2 min
Transit Washington St @ Auburn St 568 ft ~3 min
Restaurant Blue Ribbon Bar-B-Q 0.26 mi ~6 min
Convenience Corner Mini-Mart 0.27 mi ~6 min
Restaurant Mango Thai 0.27 mi ~6 min
Restaurant Paddy's Public House 0.28 mi ~6 min
95 Elm Street, West Newton 02465
Mo-Sa 11:00-23:30; Su 11:00-21:00
Coffee Lavender Cafe 0.40 mi ~9 min
15 Spencer Street, West Newton 02465
Mo-Fr 06:30-17:00; Sa-Su 08:00-17:00
Pharmacy CVS Pharmacy 0.43 mi ~9 min
999 Watertown Street, West Newton 02465
Mo-Sa 08:00-22:00
Convenience In Town Market 0.47 mi ~10 min
979 Watertown Street
Gas station Shell 0.49 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
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 School covers
Definition to come... NUCC Health Care Provider Taxonomy, code 1041S0200X
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 | 1003398561 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 31, 2018 |
| Last updated | Aug 31, 2018 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Practice address |
1507 WASHINGTON ST West Newton, MA 02465 (617) 965-0764 |
| Mailing address |
7 ATTILIO CIR Milford, MA 01757 |
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 | 9 | 8 | 5 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 9 | 7 | 5 | 3 |
Sum = 59 · next multiple of 10 = 60 · check digit = 1 · actual last digit = 1
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.