NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ethan S Ko, DO

Nephrology Physician in Fredericksburg, VA · enumerated 2008 · practices at Arlene D. Lewis, M.D., P.C..

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

National Provider Identifier

1992955058

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Ethan S Ko
Credential DO
Sex Male
Practice address 609 Jefferson Davis Hwy, 201, Fredericksburg, VA, 22401
Phone (540) 899-3107
Fax (540) 899-3183
Enumeration date Sep 25, 2008
Last updated in NPPES Sep 13, 2018

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 54475 (MN) Secondary
207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 010220875 (VA) 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

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

How do I verify Ethan Ko's NPI record?
Cross-check NPI 1992955058 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1992955058 active?
Yes, as of the latest NPPES snapshot, NPI 1992955058 is active (record last updated 2018-09-13).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-13.