NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Walter Case, PA

Nurse Practitioner in Des Moines, IA · enumerated 2010 · practices at Mercy Clinics Inc.

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

National Provider Identifier

1578880639

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name William Walter Case
Credential PA
Sex Male
Practice address 604 Locust St, Suite 210, Des Moines, IA, 50309
Phone (515) 282-7207
Fax (515) 282-7213
Enumeration date Apr 29, 2010
Last updated in NPPES Apr 29, 2010

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 629 (IA) Primary
PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program. About the PA 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

Where does William Case practice?
The practice location on file with NPPES is in Des Moines, IA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Case?
The National Provider Identifier (NPI) for William Case is 1578880639, 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 2010-04-29.