Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William Richard Seitter, MD
Pediatrics Physician in Mesa, AZ · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1720040207
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Registry record
Entity type Individual (Type 1)
Name William Richard Seitter
Credential MD
Sex Male
Practice address 4824 E Baseline Rd, Bldg. #3, Suite #125, Mesa, AZ, 85206
Phone (480) 839-4848
Fax (480) 833-8310
Enumeration date Apr 3, 2006
Last updated in NPPES Jul 1, 2008
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 William Seitter practice?
The practice location on file with NPPES is in Mesa, AZ. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Seitter?
The National Provider Identifier (NPI) for William Seitter is 1720040207, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Christopher Carlson Surgical Physician Assistant · Mesa, AZ NPI 1144220526 Lee Sa Jackson Ophthalmology Physician · Mesa, AZ NPI 1306837042 Mark Amols Reproductive Endocrinology Physician · Mesa, AZ NPI 1528048006 Donald Chudy Podiatrist · Mesa, AZ NPI 1871557140 Norman Saba Pediatrics Physician · Mesa, AZ NPI 1659335552 Lucia Ferreras-Cox Pediatrics Physician · Mesa, AZ NPI 1669438883 Arizona Ophthalmology Specialists, Plc Ophthalmology Physician · Mesa, AZ NPI 1427078906 Donald Tutt Obstetrics & Gynecology Physician · Mesa, AZ NPI 1265453450
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-07-01.