Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Alfonso Chy David, M.D.

Internal Medicine Physician in Vienna, IL · enumerated 2008.

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

National Provider Identifier

1942488978

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Registry record

Entity type Individual (Type 1)

Name Dr. Alfonso Chy David

Credential M.D.

Sex Male

Practice address Vienna, IL, 62995

Phone (618) 658-8331

Fax (618) 658-4027

Enumeration date Jan 31, 2008

Last updated in NPPES Jan 31, 2008

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Alfonso David?

The National Provider Identifier (NPI) for Alfonso David is 1942488978, a Type 1 (individual) record in the CMS NPPES registry.

Where does Alfonso David practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-01-31.