NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Bill Gentsch, PHARM.D.

Pharmacist in Mesa, AZ · enumerated 2010 · practices at Walgreen Co.

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

National Provider Identifier

1124359120

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Bill Gentsch
Credential PHARM.D.
Sex Male
Practice address 4420 E Brown Rd, Mesa, AZ, 85205
Phone (480) 396-8193
Fax (480) 807-5495
Enumeration date Jan 15, 2010
Last updated in NPPES Jan 15, 2010

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 14133 (AZ) Primary
PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy. About the PHARMD 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 Bill Gentsch?
The National Provider Identifier (NPI) for Bill Gentsch is 1124359120, a Type 1 (individual) record in the CMS NPPES registry.
Where does Bill Gentsch practice?
The practice location on file with NPPES is in Mesa, AZ. 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 2010-01-15.