Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William Alexander Greer
Nurse Practitioner in Southlake, TX · enumerated 2026.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1871447904
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Registry record
Entity type Individual (Type 1)
Name William Alexander Greer
Sex Male
Practice address 431 E State Highway 114 Ste 120, Southlake, TX, 76092
Phone (682) 651-8181
Enumeration date Feb 25, 2026
Last updated in NPPES Feb 25, 2026
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 1177094 (TX) Primary
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
How do I verify William Greer's NPI record?
Cross-check NPI 1871447904 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1871447904 active?
Yes, as of the latest NPPES snapshot, NPI 1871447904 is active (record last updated 2026-02-25).
Other providers at this practice address
Browse all → Chad Stephens Interventional Pain Medicine Physician · Southlake, TX NPI 1659372290 David Brown Pediatric Orthopaedic Surgery Physician · Southlake, TX NPI 1962422386 Noble Pain Management and Sports Medicine Pllc Interventional Pain Medicine Physician · Southlake, TX NPI 1144645995 Mary Kvinta Physician Assistant · Southlake, TX NPI 1407588809 Rural Interventional Pain Providers Pllc Interventional Pain Medicine Physician · Southlake, TX NPI 1649979774
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-25.