Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexander Clifford Pennington

Registered Nurse in Saint Louis, MO · enumerated 2026.

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

National Provider Identifier

1578412581

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Registry record

Entity type Individual (Type 1)

Name Alexander Clifford Pennington

Sex Male

Practice address 615 S New Ballas Rd, Saint Louis, MO, 63141

Phone (636) 288-5905

Enumeration date Jan 23, 2026

Last updated in NPPES Jan 23, 2026

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 2017018283 (MO) Primary

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Alexander Pennington?

Alexander Pennington is registered in NPPES with the primary taxonomy of Registered Nurse. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Robert Allen Pain Medicine (Anesthesiology) Physician · Saint Louis, MO NPI 1780689182 Linda Algra Anesthesiology Physician · Saint Louis, MO NPI 1568467959 Benjamin Yoder Anesthesiologist Assistant · Saint Louis, MO NPI 1942205281 Donald Arnold Anesthesiology Physician · Saint Louis, MO NPI 1629073820 Jay Androphy Anesthesiology Physician · Saint Louis, MO NPI 1831194034 Andrew Barnett Anesthesiology Physician · Saint Louis, MO NPI 1932104130 Robert Forstot Anesthesiology Physician · St. Louis, MO NPI 1740285683 Joann Galakatos Anesthesiology Physician · St. Louis, MO NPI 1659376598

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-23.