GILLUM PSYCHOLOGICAL & COUNSELING SERVICES
GILLUM PSYCHOLOGICAL & COUNSELING SERVICES is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003248451, based in Williamsport, PA. The organization lists 3 taxonomy classifications, with Cognitive & Behavioral Psychologist recorded as primary.
Getting there
Here is what surrounds this office in Williamsport, based on OpenStreetMap data collected Sep 13, 2026. Parking is available about 396 ft away. If you arrive early, there is a coffee shop 0.48 mi away.
Getting here and what is nearby
Gas station Turkey Hill 75 ft ~1 min
Gas station Citgo 121 ft ~1 min
Convenience Turkey Hill 154 ft ~1 min
Parking 172 ft ~1 min
Parking 183 ft ~1 min
Parking 396 ft ~2 min
Restaurant Benjie's 0.30 mi ~7 min
Restaurant Papa John's 0.36 mi ~8 min
1100 Washington Boulevard, Williamsport 17701
Mo-Th 10:00-23:00; Fr-Sa 10:00-24:00; Su 11:00-23:00
Restaurant Panera Bread 0.46 mi ~10 min
202 Basin Street, Williamsport 17701
07:00-21:00
Grocery Weis 0.47 mi ~10 min
305 River Avenue, Williamsport
Coffee Gateway Café 0.48 mi ~10 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 Cognitive & Behavioral covers
A psychologist who reflects an experimental-clinical approach distinguished by use of principles of human learning and development and theories of cognitive processing to promote meaningful change in maladaptive human behavior and thinking. NUCC Health Care Provider Taxonomy, code 103TB0200X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 103T00000X | Psychologist | — | — | |
| 103TB0200X | Cognitive & Behavioral Psychologist Cognitive & Behavioral | — | — | primary |
| 103TC2200X | Clinical Child & Adolescent Psychologist Clinical Child & Adolescent | — | — |
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003248451 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Aug 7, 2013 |
| Last updated | Jan 31, 2025 |
| Status | Active |
| Practice address |
705 WASHINGTON BOULEVARD SUITE 100 Williamsport, PA 17701 (570) 321-6390 Fax (570) 321-6393 |
| Other identifiers |
001553383
· Medicaid (PA) |
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 | 4 | 8 | 4 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 4 | 7 | 4 | 1 |
Sum = 49 · next multiple of 10 = 50 · check digit = 1 · actual last digit = 1
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.