Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexander Stein Davis, PMHNP

Psychiatric/Mental Health Nurse Practitioner in Saint Louis, MO · enumerated 2021.

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

National Provider Identifier

1881289510

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Registry record

Entity type Individual (Type 1)

Name Alexander Stein Davis

Credential PMHNP

Sex Male

Practice address 2650 Olive St, Saint Louis, MO, 63103

Phone (314) 371-6500

Fax (314) 371-6510

Enumeration date Mar 4, 2021

Last updated in NPPES Oct 5, 2022

Taxonomy & licenses

163WP0808X Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License 2021004960 (MO) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 2021004960 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Alexander Davis?

The National Provider Identifier (NPI) for Alexander Davis is 1881289510, a Type 1 (individual) record in the CMS NPPES registry.

Where does Alexander Davis practice?

The practice location on file with NPPES is in Saint Louis, MO. 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 2022-10-05.