Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Aaron S Miller, MD

Pediatric Infectious Diseases Physician in Saint Louis, MO · enumerated 2008.

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

National Provider Identifier

1427223874

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Registry record

Entity type Individual (Type 1)

Name Dr. Aaron S Miller

Credential MD

Sex Male

Practice address 1465 S Grand Blvd, Saint Louis, MO, 63104

Phone (314) 577-5644

Fax (314) 268-2712

Enumeration date Apr 28, 2008

Last updated in NPPES Jan 18, 2021

Taxonomy & licenses

2080P0208X Pediatric Infectious Diseases Physician Allopathic & Osteopathic Physicians · License 2009001452 (MO) Primary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 2009001452 (MO) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
284086001	Medicaid	IL	-

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

How do I verify Aaron Miller's NPI record?

Cross-check NPI 1427223874 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1427223874 active?

Yes, as of the latest NPPES snapshot, NPI 1427223874 is active (record last updated 2021-01-18).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-18.