Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dennis M Drehner, DO

Pediatric Pathology Physician in Orlando, FL · enumerated 2005.

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

National Provider Identifier

1578556643

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Registry record

Entity type Individual (Type 1)

Name Dennis M Drehner

Credential DO

Sex Male

Practice address 1717 S. Orange Ave., Suite 100, Nemours Childrens Clinic, Orlando, Orlando, FL, 32806

Phone (407) 650-7715

Fax (407) 650-7124

Enumeration date Aug 24, 2005

Last updated in NPPES Oct 24, 2012

Taxonomy & licenses

207ZP0213X Pediatric Pathology Physician Allopathic & Osteopathic Physicians · License 41867 (MN) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
921425900	Medicaid	MN	-

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.

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Frequently asked questions

Is NPI 1578556643 active?

Yes, as of the latest NPPES snapshot, NPI 1578556643 is active (record last updated 2012-10-24).

How do I verify Dennis Drehner's NPI record?

Cross-check NPI 1578556643 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-10-24.