TJ HOULIHAN DMD LLC
TJ HOULIHAN DMD LLC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003311465, based in Tigard, OR. It is classified under General Practice Dentistry.
Getting there
Here is what surrounds this office in Tigard, based on OpenStreetMap data collected Sep 18, 2026. Parking is available about 968 ft away. The nearest transit stop is 760 ft away, served by 15700 Block Southwest 72nd. If you arrive early, there is a coffee shop 0.27 mi away.
Getting here and what is nearby
Transit Southwest 72nd & Kable 373 ft ~2 min
Hotel Courtyard by Marriott Portland Tigard 375 ft ~2 min
Transit Southwest 72nd & Kable 430 ft ~2 min
Parking 399 ft ~2 min
Transit 15700 Block Southwest 72nd 760 ft ~3 min
Convenience Food Mart 718 ft ~3 min
15670 Upper Boones Ferry Road, Lake Oswego 97035
Gas station Chevron 719 ft ~3 min
15670 Upper Boones Ferry Road, Lake Oswego 97035
Restaurant Burgerville 724 ft ~3 min
15650 Upper Boones Ferry Road, Lake Oswego 97035
06:00-22:00
Parking 769 ft ~3 min
Restaurant Big Town Hero 896 ft ~4 min
Parking 968 ft ~4 min
Restaurant Speakeasy Bar & Grill 932 ft ~4 min
15680 Upper Boones Ferry Road, Lake Oswego 97035
Hotel Holiday Inn Express Portland South - Lake Oswego 0.20 mi ~5 min
Gas station 76 0.22 mi ~5 min
Convenience 76 0.23 mi ~5 min
Coffee Starbucks 0.27 mi ~6 min
6600 Southwest Cardinal Lane, Tigard 97224
Mo-Fr 05:00-19:00; Sa-Su 05:00-18:00
Grocery Trader Joe's 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 |
|---|---|---|
| D8127 | OR | General Practice Dentistry primary |
This provider holds licence D8127 issued in OR. 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 General Practice covers
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs. NUCC Health Care Provider Taxonomy, code 1223G0001X
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 | 1003311465 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Mar 28, 2018 |
| Last updated | Jun 27, 2018 |
| Status | Active |
| Practice address |
15495 SW SEQUOIA PKWY STE 120 Tigard, OR 97224 (503) 684-8445 |
| Mailing address |
1990 ALPINE DR West Linn, OR 97068 |
| Other names |
Dental Professionals Former Legal Name |
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 | 1 | 1 | 4 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 1 | 2 | 4 | 3 |
Sum = 45 · next multiple of 10 = 50 · check digit = 5 · actual last digit = 5
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.