PETER C. LIU D.D.S., INC.
PETER C. LIU D.D.S., INC. is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1902989262, based in Walnut, CA. The organization lists 5 taxonomy classifications, with Endodontics recorded as primary.
Getting there
The practice address on file is 18710 AMAR RD STE D, Walnut, CA 91789. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 53896 | CA | Endodontics primary |
| 35917 | CA | Endodontics |
| 49934 | CA | Pediatric Dentistry |
| 38226 | CA | Periodontics |
| 24358 | CA | Oral and Maxillofacial Surgery (Dentist) |
| 41855 | CA | Orthodontics and Dentofacial Orthopedics… |
This provider holds licence 53896 issued in CA. 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 Endodontics covers
The branch of dentistry that is concerned with the morphology, physiology and pathology of the human dental pulp and periradicular tissues. Its study and practice encompass the basic and clinical sciences including biology of the normal pulp, the etiology, diagnosis, prevention and treatment of diseases and injuries of the pulp and associated periradicular conditions. NUCC Health Care Provider Taxonomy, code 1223E0200X
All registered taxonomy codes
This provider registers 6 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 1223E0200X | Endodontics Endodontics | 53896 | CA | primary |
| 1223E0200X | Endodontics Endodontics | 35917 | CA | |
| 1223P0221X | Pediatric Dentistry Pediatric Dentistry | 49934 | CA | |
| 1223P0300X | Periodontics Periodontics | 38226 | CA | |
| 1223S0112X | Oral and Maxillofacial Surgery (Dentist) Oral and Maxillofacial Surgery | 24358 | CA | |
| 1223X0400X | Orthodontics and Dentofacial Orthopedics Dentistry Orthodontics and Dentofacial Orthopedics | 41855 | CA |
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 | 1902989262 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Oct 23, 2006 |
| Last updated | Nov 21, 2008 |
| Status | Active |
| Practice address |
18710 AMAR RD STE D Walnut, CA 91789 (909) 598-2999 Fax (626) 965-9955 |
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 | 9 | 0 | 2 | 9 | 8 | 9 | 2 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 0 | 2 | 9 | 8 | 9 | 2 | 3 |
Sum = 68 · next multiple of 10 = 70 · 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.