Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dennis S. Asensio, M.D.

Internal Medicine Physician in Lisle, IL · enumerated 2005.

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

National Provider Identifier

1891770624

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Registry record

Entity type Individual (Type 1)

Name Dennis S. Asensio

Credential M.D.

Sex Male

Practice address 2765 Maple Ave, Lisle, IL, 60532

Phone (630) 579-9817

Fax (630) 579-9846

Enumeration date Dec 14, 2005

Last updated in NPPES Dec 1, 2010

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036-075848 (IL) 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
36075848	Medicaid	IL	-
110210903	Other	-	RAILROAD MEDICARE

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 is the NPI number for Dennis Asensio?

The National Provider Identifier (NPI) for Dennis Asensio is 1891770624, a Type 1 (individual) record in the CMS NPPES registry.

Where does Dennis Asensio practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-12-01.