Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Louis W. Apostolakis, M.D.
Specialist in West Lake Hills, TX · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1790908341
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Registry record
Entity type Individual (Type 1)
Name Louis W. Apostolakis
Credential M.D.
Sex Male
Practice address 5656 Bee Cave Rd, E-201, West Lake Hills, TX, 78746
Phone (512) 329-8989
Fax (512) 329-8890
Enumeration date Apr 11, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| L2104 | Other | TX | MEDICAL LIS |
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
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Louis Apostolakis?
Louis Apostolakis is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.