Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Joseph Marcus Overhage, M.D., PH.D.

Internal Medicine Physician in Zionsville, IN · enumerated 2005.

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

National Provider Identifier

1720085186

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Registry record

Entity type Individual (Type 1)

Name Dr. Joseph Marcus Overhage

Credential M.D., PH.D.

Sex Male

Practice address 4540 S 975 E, Zionsville, IN, 46077

Phone (317) 873-9287

Fax (317) 873-9287

Enumeration date Jun 30, 2005

Last updated in NPPES Dec 2, 2019

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 01038698A (IN) Primary

2083C0008X Clinical Informatics Physician Allopathic & Osteopathic Physicians · License 01038698A (IN) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Joseph Overhage?

The National Provider Identifier (NPI) for Joseph Overhage is 1720085186, a Type 1 (individual) record in the CMS NPPES registry.

Where does Joseph Overhage practice?

The practice location on file with NPPES is in Zionsville, IN. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-12-02.