Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Rex Michael Mustard
Pharmacist in Round Rock, TX · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1902135627
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Registry record
Entity type Individual (Type 1)
Name Rex Michael Mustard
Sex Male
Practice address 2220 S Ih 35, Round Rock, TX, 78681
Phone (512) 244-3753
Enumeration date Dec 8, 2009
Last updated in NPPES Dec 8, 2009
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 Rex Mustard practice?
The practice location on file with NPPES is in Round Rock, TX. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Rex Mustard?
The National Provider Identifier (NPI) for Rex Mustard is 1902135627, 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 2009-12-08.