Sarah Cantor
Sarah Cantor is a provider specialising in Clinical Social Worker in Waltham, MA, registered under NPI 1003584723. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. 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 Waltham, based on OpenStreetMap data collected Oct 8, 2026. Parking is available about 463 ft away. There is EV charging 930 ft from the office — useful if you are driving in from out of town. The nearest transit stop is 796 ft away, served by Rumford Ave @ Woerd Ave.
Getting here and what is nearby
Transit Rumford Ave @ Buttrick St 66 ft ~1 min
Transit Rumford Ave @ Buttrick St 91 ft ~1 min
Parking 212 ft ~1 min
Parking 441 ft ~2 min
Parking 463 ft ~2 min
Transit Rumford Ave @ Woerd Ave 796 ft ~4 min
EV charging 930 ft ~4 min
48 Woerd Avenue, Waltham 02453
Restaurant Burger King 0.25 mi ~6 min
881 Moody Street, Waltham 02453-5045
06:00-22:00
Restaurant NY Pie 0.25 mi ~6 min
934 Moody Street
Restaurant Despaquale's At Night Caps Corner 0.25 mi ~6 min
Gas station Mobil 0.28 mi ~6 min
Convenience Moody Spa 0.32 mi ~7 min
807;811 Moody Street
Hotel Crescent Suites Hotel Waltham 0.35 mi ~8 min
Convenience Salgueros Market 3 0.41 mi ~9 min
711;713;715;717 Moody Street
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 covers
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances. NUCC Health Care Provider Taxonomy, code 1041C0700X
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 | |
|---|---|---|---|---|
| 1041C0700X | Clinical Social Worker Clinical | — | — | primary |
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — |
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 | 1003584723 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 30, 2021 |
| Last updated | Jun 14, 2022 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
77 RUMFORD AVE Waltham, MA 02453 (781) 894-4325 |
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 | 5 | 8 | 4 | 7 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 8 | 8 | 7 | 4 |
Sum = 57 · next multiple of 10 = 60 · check digit = 3 · actual last digit = 3
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.