Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Leonard Allen Yontz, M.D.

Emergency Medicine Physician in Buckeye, AZ · enumerated 2013 · practices at Hospital Development of West Phoenix Inc.

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

National Provider Identifier

1578805966

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Leonard Allen Yontz

Credential M.D.

Sex Male

Practice address 525 S Watson Rd, Buckeye, AZ, 85326

Phone (623) 925-3980

Fax (706) 721-5600

Enumeration date Mar 23, 2013

Last updated in NPPES Apr 20, 2021

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 49717 (AZ) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Leonard Yontz?

The National Provider Identifier (NPI) for Leonard Yontz is 1578805966, a Type 1 (individual) record in the CMS NPPES registry.

Where does Leonard Yontz practice?

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

Other providers at this practice address

Browse all →

Hospital Development of West Phoenix Inc General Acute Care Hospital · Buckeye, AZ NPI 1528512407 Dawn Maxwell Primary Care Nurse Practitioner · Buckeye, AZ NPI 1487163218

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-20.