WILLIAM MICHAEL SR. BRENNAN (DDS) – Dentist, NPI 1235142746
Dentist
Main info
Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for WILLIAM MICHAEL SR. BRENNAN (DDS)
5133, Washington Street, Downers Grove, DuPage County, Illinois, 60515, United States
DOWNERS GROVE, IL 60515
Phone: (630) 969-4645
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
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Medicare Enrollment & Revalidation
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PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2016-01-05
PECOS data refreshed: 2026-05-27
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Medicare Utilization (FFS)
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No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 60515)
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