Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Walter Joseph Crook, MD
Psychiatry Physician in Willmar, MN · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1437372729
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Registry record
Entity type Individual (Type 1)
Name Dr. Walter Joseph Crook
Credential MD
Sex Male
Practice address 1701 Technology Dr Ne, Willmar, MN, 56201
Phone (320) 231-5906
Enumeration date Apr 11, 2007
Last updated in NPPES Jul 12, 2026
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD 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.
Frequently asked questions
Where does Walter Crook practice?
The practice location on file with NPPES is in Willmar, MN. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Walter Crook?
The National Provider Identifier (NPI) for Walter Crook is 1437372729, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-12.