NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. John Vallian, MD

Specialist in Opelousas, LA · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1023003159

Verified

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Registry record

Entity type Individual (Type 1)
Name Dr. John Vallian
Credential MD
Sex Male
Practice address Opelousas, LA, 70570
Phone (337) 543-1063
Fax (337) 543-1073
Enumeration date Sep 14, 2005
Last updated in NPPES Jul 8, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 08449R (LA) Primary
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
1921033 Medicaid LA -
436845923B Other LA BLUE CROSS/BLUE SHIELD

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does John Vallian practice?
The practice location on file with NPPES is in Opelousas, LA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Vallian?
The National Provider Identifier (NPI) for John Vallian is 1023003159, 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.