Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stanley Vriezelaar, M.D.

Internal Medicine Physician in Saint Louis, MO · enumerated 2005.

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

National Provider Identifier

1649252552

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Registry record

Entity type Individual (Type 1)

Name Stanley Vriezelaar

Credential M.D.

Sex Male

Practice address 1027 Bellevue Ave, Suite 107, Saint Louis, MO, 63117

Phone (314) 645-3743

Fax (314) 647-7967

Enumeration date Nov 16, 2005

Last updated in NPPES Oct 1, 2012

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License R4D79 (MO) Primary

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
101286	Other	MO	HEALTHLINK
25674	Other	MO	BCBS
000000010041	Other	MO	ESSENCE
4032391	Other	MO	AETNA
A13085	Other	MO	MERCY
0400407	Other	MO	UHC
127499	Other	MO	GHP

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

What is the NPI number for Stanley Vriezelaar?

The National Provider Identifier (NPI) for Stanley Vriezelaar is 1649252552, a Type 1 (individual) record in the CMS NPPES registry.

Where does Stanley Vriezelaar 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 2012-10-01.