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

Alexa Jo Duling Williams, MD

Obstetrics & Gynecology Physician in O Fallon, MO · enumerated 2017 · practices at Ssm Medical Group Inc..

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

National Provider Identifier

1972033652

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Registry record

Entity type Individual (Type 1)

Name Alexa Jo Duling Williams

Credential MD

Sex Female

Practice address O Fallon, MO, 63366

Phone (636) 379-6363

Enumeration date Jun 15, 2017

Last updated in NPPES Nov 10, 2025

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

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 2021013439 (MO) Primary

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 2017019537 (MO) Secondary

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.

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Frequently asked questions

How do I verify Alexa Williams's NPI record?

Cross-check NPI 1972033652 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1972033652 active?

Yes, as of the latest NPPES snapshot, NPI 1972033652 is active (record last updated 2025-11-10).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-10.