Katy Tarella, LICSW
Katy Tarella, LICSW is a provider specialising in Clinical Social Worker in Belmont, MA, registered under NPI 1003358433. 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 Belmont, based on OpenStreetMap data collected Sep 21, 2026. Parking is available about 997 ft away at Bowditch Lot. The nearest transit stop is 0.44 mi away, served by Waverley Oaks Rd opp Brookfield Rd. If you arrive early, there is a coffee shop 0.34 mi away.
Getting here and what is nearby
Parking Higgingson Lot 456 ft ~2 min
Parking Oaks Lot 586 ft ~3 min
Parking Bowditch Lot 997 ft ~4 min
Gas station BP 0.33 mi ~7 min
563 Trapelo Road
Grocery Star Market 0.33 mi ~7 min
535 Trapelo Road, Belmont 02478
Mo-Su 07:00-22:00
Coffee Starbucks 0.34 mi ~7 min
Transit Trapelo Rd @ Church St 0.39 mi ~8 min
Transit Church St @ Lexington St 0.42 mi ~9 min
Transit Waverley Oaks Rd opp Brookfield Rd 0.44 mi ~9 min
Restaurant Dunkin' 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
| Licence | State | Specialty |
|---|---|---|
| 119934 | MA | Clinical Social Worker primary |
This provider holds licence 119934 issued in MA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
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
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 | 1003358433 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 16, 2016 |
| Last updated | Nov 16, 2016 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | LICSW |
| Practice address |
115 MILL ST MAILSTOP 137 Belmont, MA 02478 (617) 855-4178 |
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 | 8 | 4 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 5 | 7 | 4 | 6 |
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.