John Brennan, MD
Quick Facts
NPI Validation Status: Verified
Provider Overview
JOHN BRENNAN, MD is a Emergency Medicine provider based in Onalaska, WI who has been registered with CMS since 2005. This NPI is currently Active under CMS NPPES registry.
Provider Details
Practice Location
Specialties & Licenses
Mailing Address
How to Use This NPI
For Insurance Billing
Use NPI 1891776977 in Box 33 of the CMS-1500 claim form. This number is required by all major insurance carriers to identify the billing provider and process electronic medical claims.
For Credentialing
Reference NPI 1891776977for provider credential verification. Hospital systems, state licensing boards, and CAQH directories query this number to verify the provider's active clinical status.
For Patients
Share NPI 1891776977 with your insurance company. If you need to verify out-of-network benefits or file a reimbursement claim, your insurance provider will require this number to process it.
About Emergency Medicine
Emergency Medicine physicians specialize in the immediate decision-making and action necessary to prevent death or further disability in patients experiencing acute illness or trauma.
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People Also Ask
What is John Brennan's NPI number?
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What does John Brennan specialize in?
207P00000X.