Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Donald Liu
Endodontics in Newark, DE · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1417158189
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Registry record
Entity type Individual (Type 1)
Name Dr. Donald Liu
Sex Male
Practice address 31 Omega Dr, Suite J-31, Newark, DE, 19713
Phone (302) 733-7600
Fax (302) 733-7522
Enumeration date May 30, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Where does Donald Liu practice?
The practice location on file with NPPES is in Newark, DE. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Donald Liu?
The National Provider Identifier (NPI) for Donald Liu is 1417158189, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.