NPI Portal NPI Lookup & Verification

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

Dr. Dominador L Dayon Jr., M. D.

Family Medicine Physician in Chicago, IL · enumerated 2006.

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

National Provider Identifier

1609989912

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Registry record

Entity type Individual (Type 1)
Name Dr. Dominador L Dayon Jr.
Credential M. D.
Sex Male
Practice address Chicago, IL, 60617
Phone (773) 768-5182
Fax (773) 978-5930
Enumeration date Aug 17, 2006
Last updated in NPPES Feb 27, 2012

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

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 036052751 (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
036052751 Medicaid IL -
21606243 Other IL BLUE CROSS BLUE SHIELD

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 Dominador Dayon?
The National Provider Identifier (NPI) for Dominador Dayon is 1609989912, a Type 1 (individual) record in the CMS NPPES registry.
Where does Dominador Dayon practice?
The practice location on file with NPPES is in Chicago, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-27.