Gregory Sheehan
Gregory Sheehan is a provider specialising in Behavior Analyst in San Mateo, CA, registered under NPI 1003287889.
Getting there
Here is what surrounds this office in San Mateo, based on OpenStreetMap data collected Sep 16, 2026. Parking is available about 516 ft away. There is EV charging 0.22 mi from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 903 ft away, served by Peninsula Avenue & Bloomfield Road. A pharmacy sits 270 ft from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 431 ft away.
Getting here and what is nearby
Gas station Chevron 145 ft ~1 min
Transit North Delaware Street & Peninsula Avenue 240 ft ~1 min
Parking 243 ft ~1 min
Pharmacy CVS Pharmacy 270 ft ~2 min
Coffee Starbucks 431 ft ~2 min
Parking 403 ft ~2 min
Restaurant Wingstop 435 ft ~2 min
Restaurant Totoro Ramen 425 ft ~2 min
Grocery Safeway 401 ft ~2 min
860 North Delaware Street, San Mateo 94401
06:00-24:00
Transit Peninsula Avenue & Claremont Street 526 ft ~2 min
Parking 516 ft ~2 min
Transit Peninsula Avenue & Bloomfield Road 903 ft ~4 min
EV charging ChargePoint 0.22 mi ~5 min
Gas station Shell 0.24 mi ~5 min
Restaurant Minako 0.26 mi ~6 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 Behavior Analyst covers
A behavior analyst is qualified by at least a master's degree and Behavior Analyst Certification Board certification and/or a state-issued credential (such as a license) to practice behavior analysis independently. Behavior analysts provide the required supervision to assistant behavior analysts and behavior technicians. A behavior analyst delivers services consistent with the dimensions of applied behavior analysis. Common services may include, but are not limited to, conducting behavioral assessments, analyzing data, writing and revising behavior-analytic treatment plans, training others to implement components of treatment plans, and overseeing implementation of treatment plans. NUCC Health Care Provider Taxonomy, code 103K00000X
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 | 1003287889 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 19, 2015 |
| Last updated | Oct 19, 2015 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Practice address |
424 PENINSULA AVE San Mateo, CA 94401 (800) 538-8365 |
| Mailing address |
739 WINCHESTER DR Burlingame, CA 94010 |
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 | 2 | 8 | 7 | 8 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 8 | 5 | 8 | 7 |
Sum = 61 · next multiple of 10 = 70 · check digit = 9 · actual last digit = 9
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.