NPI Portal NPI Lookup & Verification

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

Charles Simonson, M.D.

Internal Medicine Physician in Marrero, LA · enumerated 2007.

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

National Provider Identifier

1376731588

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Registry record

Entity type Individual (Type 1)
Name Charles Simonson
Credential M.D.
Sex Male
Practice address Marrero, LA, 70072
Phone (504) 347-5435
Fax (504) 347-2119
Enumeration date Oct 12, 2007
Last updated in NPPES Oct 12, 2007

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD012837 (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
1146846 Medicaid LA -

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.

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Frequently asked questions

What is the NPI number for Charles Simonson?
The National Provider Identifier (NPI) for Charles Simonson is 1376731588, a Type 1 (individual) record in the CMS NPPES registry.
Where does Charles Simonson practice?
The practice location on file with NPPES is in Marrero, LA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-10-12.