Caitlin O'leary, BA
Caitlin O'leary, BA is an Addiction (Substance Use Disorder) Counselor in Fitchburg, MA, registered under NPI 1003584004. 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 Fitchburg, based on OpenStreetMap data collected Oct 8, 2026. Parking is available about 674 ft away. The nearest transit stop is 0.43 mi away, served by MART Garage(City Line). If you arrive early, there is a coffee shop 609 ft away.
Getting here and what is nearby
Parking 484 ft ~2 min
Parking 525 ft ~2 min
Coffee Pammy's Place 609 ft ~3 min
Parking 674 ft ~3 min
Convenience Valeria's Kitchen 0.23 mi ~5 min
50 Airport Road
Restaurant Kiki's Ramen Shop 0.26 mi ~6 min
Grocery Millbury Super Oriental Fish Market 0.30 mi ~7 min
58;60 Bemis Road
Gas station AL Prime Energy 0.38 mi ~8 min
Convenience AL Prime Energy 0.39 mi ~8 min
1313 Water Street
Convenience Fitchburg Variety 0.39 mi ~8 min
938 Water Street
Gas station Royal Fuel 0.42 mi ~9 min
Transit MART Garage(City Line) 0.43 mi ~9 min
Grocery Cowboy Supermarket 0.44 mi ~9 min
Restaurant The Savory Skillet 0.46 mi ~10 min
400 Summer Street
Restaurant Subway 0.50 mi ~10 min
2 Ray Avenue, Fitchburg 01420
Mo-Fr 07:30-22:00; Sa 09:30-22:00; Su 09:30-20:00
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 Addiction (Substance Use Disorder) covers
Definition to come... NUCC Health Care Provider Taxonomy, code 101YA0400X
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 | 1003584004 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 3, 2021 |
| Last updated | Sep 3, 2021 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | BA |
| Practice address |
155 AIRPORT RD Fitchburg, MA 01420 (978) 343-6300 |
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 | 0 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 8 | 8 | 0 | 0 |
Sum = 46 · next multiple of 10 = 50 · 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.