NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marilou Grainger, CRNA

Certified Registered Nurse Anesthetist in Washington, MO · enumerated 2006.

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

National Provider Identifier

1376514414

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Marilou Grainger
Credential CRNA
Sex Female
Practice address 901 E 5th St, Washington, MO, 63090
Phone (636) 239-8000
Enumeration date Jan 27, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License 080485 (MO) Primary
CRNA · Certified Registered Nurse Anesthetist: An advanced practice nurse specializing in anesthesia care. About the CRNA 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Marilou Grainger?
The National Provider Identifier (NPI) for Marilou Grainger is 1376514414, a Type 1 (individual) record in the CMS NPPES registry.
Where does Marilou Grainger practice?
The practice location on file with NPPES is in Washington, MO. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.