Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joseph P Slimack, MD

Anesthesiology Physician in Saint Louis, MO · enumerated 2005.

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

National Provider Identifier

1427054931

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Registry record

Entity type Individual (Type 1)

Name Joseph P Slimack

Credential MD

Sex Male

Practice address 3015 N Ballas Rd, Saint Louis, MO, 63131

Phone (314) 996-5330

Fax (314) 810-1399

Enumeration date Jun 21, 2005

Last updated in NPPES May 13, 2008

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License R6P69 (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
203089800	Medicaid	MO	-
050022630	Other	MO	RAILROAD MEDICARE
207646415	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 1427054931 active?

Yes, as of the latest NPPES snapshot, NPI 1427054931 is active (record last updated 2008-05-13).

How do I verify Joseph Slimack's NPI record?

Cross-check NPI 1427054931 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 2008-05-13.