Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Diana L Westerfield, D.O.

Cardiovascular Disease Physician in Saint Peters, MO · enumerated 2006.

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

National Provider Identifier

1962440883

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Registry record

Entity type Individual (Type 1)

Name Dr. Diana L Westerfield

Credential D.O.

Sex Female

Practice address 10 Hospital Dr Ste 100, Saint Peters, MO, 63376

Phone (636) 916-7272

Enumeration date Jun 3, 2006

Last updated in NPPES May 19, 2021

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 118402 (MO) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
243969409	Medicaid	MO	-

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

Is NPI 1962440883 active?

Yes, as of the latest NPPES snapshot, NPI 1962440883 is active (record last updated 2021-05-19).

How do I verify Diana Westerfield's NPI record?

Cross-check NPI 1962440883 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-19.