NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. William Peyton Miller, MD FAAP

Pediatrics Physician in Ottumwa, IA · enumerated 2006.

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

National Provider Identifier

1215974126

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Registry record

Entity type Individual (Type 1)
Name Dr. William Peyton Miller
Credential MD FAAP
Sex Male
Practice address Ottumwa, IA, 52501
Phone (641) 683-3448
Enumeration date May 31, 2006
Last updated in NPPES Jul 28, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD-42223 (IA) Secondary
208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License E1002 (AR) Primary

Other identifiers

Identifier Type State Issuer
129666001 Medicaid AR -

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.

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Frequently asked questions

What is the NPI number for William Miller?
The National Provider Identifier (NPI) for William Miller is 1215974126, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Miller practice?
The practice location on file with NPPES is in Ottumwa, IA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-28.