Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory P. Harders, MD

Emergency Medicine Physician in Ketchikan, AK · enumerated 2006.

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

National Provider Identifier

1891746541

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Registry record

Entity type Individual (Type 1)

Name Gregory P. Harders

Credential MD

Sex Male

Practice address 3100 Tongass Ave, Ketchikan, AK, 99901

Phone (907) 225-5171

Fax (907) 370-2533

Enumeration date May 15, 2006

Last updated in NPPES Oct 23, 2025

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 52680 (TN) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 75805 (MN) Secondary

146D00000X Personal Emergency Response Attendant Emergency Medical Service Providers · License 28351 (AZ) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 214852 (AK) Primary

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

Is NPI 1891746541 active?

Yes, as of the latest NPPES snapshot, NPI 1891746541 is active (record last updated 2025-10-23).

How do I verify Gregory Harders's NPI record?

Cross-check NPI 1891746541 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 2025-10-23.