Hannah Overlock, LAC.
Hannah Overlock, LAC. is a provider specialising in Acupuncturist in Sag Harbor, NY, registered under NPI 1003666892. 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 Sag Harbor, based on OpenStreetMap data collected Oct 13, 2026. Parking is available about 926 ft away. The nearest transit stop is 984 ft away, served by Main St/Washington St. If you arrive early, there is a coffee shop 0.21 mi away.
Getting here and what is nearby
Parking 156 ft ~1 min
Parking 257 ft ~1 min
Hotel American Hotel 885 ft ~4 min
45 Main Street, Sag Harbor 11963
Transit Main St/Washington St 930 ft ~4 min
Parking 926 ft ~4 min
Transit Main St/Washington St 984 ft ~4 min
Coffee Grindstone Coffee & Donuts 0.21 mi ~5 min
Restaurant Lulu Kitchen & Bar 0.21 mi ~5 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 |
|---|---|---|
| 007411 | NY | Acupuncturist primary |
This provider holds licence 007411 issued in NY. 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 Acupuncturist covers
An acupuncturist is a person who performs ancient therapy for alleviation of pain, anesthesia and treatment of some diseases. Acupuncturists use long, fine needles inserted into specific points in order to treat painful conditions or produce anesthesia. NUCC Health Care Provider Taxonomy, code 171100000X
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 | 1003666892 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 25, 2024 |
| Last updated | Mar 25, 2024 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | LAC. |
| Practice address |
34 BAY ST STE 204 Sag Harbor, NY 11963 (917) 599-6871 |
| Mailing address |
7 DRIFTWOOD LN East Hampton, NY 11937 |
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 | 6 | 6 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 3 | 6 | 3 | 8 | 9 |
Sum = 58 · next multiple of 10 = 60 · check digit = 2 · actual last digit = 2
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.