Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Randall William Lengeling, M.D.

Gastroenterology Physician in Dubuque, IA · enumerated 2006.

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

National Provider Identifier

1912976861

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Registry record

Entity type Individual (Type 1)

Name Randall William Lengeling

Credential M.D.

Sex Male

Practice address 1515 Delhi St, Ste 100, Dubuque, IA, 52001

Phone (563) 557-9111

Fax (563) 589-4046

Enumeration date Mar 14, 2006

Last updated in NPPES Apr 6, 2021

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 21418 (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
0180377089	Medicaid	IL	-
0183657	Medicaid	IA	-
30413500	Medicaid	WI	-

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

Where does Randall Lengeling practice?

The practice location on file with NPPES is in Dubuque, IA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Randall Lengeling?

The National Provider Identifier (NPI) for Randall Lengeling is 1912976861, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-06.