Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Joseph Don Liewer, M.D.

Emergency Medicine Physician in Sioux City, IA · enumerated 2006.

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

National Provider Identifier

1447296140

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Registry record

Entity type Individual (Type 1)

Name Dr. Joseph Don Liewer

Credential M.D.

Sex Male

Practice address 801 5th St, Sioux City, IA, 51101

Phone (712) 279-2010

Enumeration date Jun 21, 2006

Last updated in NPPES Jul 5, 2019

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 30598 (IA) 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
421344575	Other	-	CHAMPUS
930102731	Other	-	RAILROAD
1133256	Medicaid	IA	-
24225	Other	-	MIDLANDS CHOICE
421344575	Other	-	WELLMARK SELECT
7701130	Medicaid	SD	-
33036	Other	-	WELLMARK BCBS

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 specialty is Joseph Liewer?

Joseph Liewer is registered in NPPES with the primary taxonomy of Emergency Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-07-05.