Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joannie Mae Cathey Cook, MD

Internal Medicine Physician in Los Angeles, CA · enumerated 2007.

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

National Provider Identifier

1780737981

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Registry record

Entity type Individual (Type 1)

Name Joannie Mae Cathey Cook

Credential MD

Sex Female

Practice address 231 W Vernon Ave, Ste 204, Los Angeles, CA, 90037

Phone (310) 724-7448

Fax (323) 232-6784

Enumeration date Jan 19, 2007

Last updated in NPPES Dec 4, 2014

Taxonomy & licenses

207LC0200X Critical Care Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License A33575 (CA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A33575 (CA) Primary

2083P0500X Preventive Medicine/Occupational Environmental Medicine Physician Allopathic & Osteopathic Physicians · License A33575 (CA) Secondary

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
A3357350	Medicaid	CA	-

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 Joannie Cathey Cook practice?

The practice location on file with NPPES is in Los Angeles, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Joannie Cathey Cook?

The National Provider Identifier (NPI) for Joannie Cathey Cook is 1780737981, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-12-04.