Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John Robert Marietta, MD
Specialist in Austin, TX · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1114033693
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Registry record
Entity type Individual (Type 1)
Name Dr. John Robert Marietta
Credential MD
Sex Male
Practice address 6101 Balcones Dr Ste 300, Austin, TX, 78731
Phone (512) 482-0045
Fax (512) 476-9892
Enumeration date Aug 21, 2006
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
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 John Marietta practice?
The practice location on file with NPPES is in Austin, TX. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Marietta?
The National Provider Identifier (NPI) for John Marietta is 1114033693, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.