Dr. John Oak MD
About this NPIWhat this record shows.
NPI 1124026646 is registered to Dr. John Oak MD, a Cardiovascular Disease practising at 1400 Professional Blvd in Evansville, Indiana. Cardiology is a medical specialty focused on disorders of the heart and blood vessels, including coronary artery disease, heart failure, arrhythmias, and hypertension. Dr. John Oak MD has been enumerated in the National Provider Identifier (NPI) registry since 2005.
Secondary identifiers
Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.
Medicaid
Source: NPPES public registry.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Dr. John Oak MD accepts. To confirm in-network status with your specific health plan, contact Dr. John Oak MD directly at (812) 473-2642.
Frequently asked
Yes. NPI 1124026646 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Cardiology is a medical specialty focused on disorders of the heart and blood vessels, including coronary artery disease, heart failure, arrhythmias, and hypertension.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (812) 473-2642.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Dr. John Oak MD is a Type-1 individual NPI.