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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Daniel Aaron Ostler, D.O.

Anatomic Pathology & Clinical Pathology Physician in Naples, FL · enumerated 2009.

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

National Provider Identifier

1376784421

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Registry record

Entity type Individual (Type 1)
Name Dr. Daniel Aaron Ostler
Credential D.O.
Sex Male
Practice address 4351 Tamiami Trl N, Naples, FL, 34103
Phone (239) 263-1777
Fax (239) 263-6983
Enumeration date Mar 19, 2009
Last updated in NPPES Jan 10, 2017

Taxonomy & licenses

207ZD0900X Dermatopathology (Pathology) Physician Allopathic & Osteopathic Physicians · License M6814 (TX) Secondary
207ZP0101X Anatomic Pathology Physician Allopathic & Osteopathic Physicians · License M6814 (TX) Secondary
207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License OS13393 (FL) Primary
207ZD0900X Dermatopathology (Pathology) Physician Allopathic & Osteopathic Physicians · License OS13393 (FL) Secondary
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

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 1376784421 active?
Yes, as of the latest NPPES snapshot, NPI 1376784421 is active (record last updated 2017-01-10).
How do I verify Daniel Ostler's NPI record?
Cross-check NPI 1376784421 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 2017-01-10.