Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christopher Paul Grenier, M.D.

Ophthalmology Physician in Baton Rouge, LA · enumerated 2006.

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

National Provider Identifier

1700818135

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Registry record

Entity type Individual (Type 1)

Name Christopher Paul Grenier

Credential M.D.

Sex Male

Practice address 9001 Summa Ave, Baton Rouge, LA, 70809

Phone (225) 761-5200

Fax (225) 761-5714

Enumeration date Jul 7, 2006

Last updated in NPPES Mar 30, 2010

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License L019546 (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
1918814	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Christopher Grenier practice?

The practice location on file with NPPES is in Baton Rouge, LA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Christopher Grenier?

The National Provider Identifier (NPI) for Christopher Grenier is 1700818135, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-30.