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Jon W. Mares, DO

Nephrologist, Internist

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Specialties and Licenses

Licensed In
Illinois, Texas
NPI Number
1023375300
In the National Registry
14 years (since 2012)

Name, specialties, licenses and address come from the NPPES national provider registry, updated weekly (this record last changed September 2025).

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The information on this site is for general educational purposes only and is not medical advice, diagnosis, or treatment. Reading this site does not create a doctor–patient relationship. Always consult a qualified healthcare professional for personal guidance. If this is an emergency, call 911. Mentions of medications, devices, or procedures are informational and not endorsements. Full medical disclaimer.