NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Derek Christopher Harshaw, D.O

Internal Medicine Physician in East Liverpool, OH · enumerated 2016.

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

National Provider Identifier

1588010649

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Registry record

Entity type Individual (Type 1)
Name Derek Christopher Harshaw
Credential D.O
Sex Male
Practice address East Liverpool, OH, 43920
Phone (330) 385-7200
Enumeration date May 9, 2016
Last updated in NPPES Oct 28, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 3350 (WV) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 34.013770 (OH) 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.

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Frequently asked questions

Is NPI 1588010649 active?
Yes, as of the latest NPPES snapshot, NPI 1588010649 is active (record last updated 2021-10-28).
How do I verify Derek Harshaw's NPI record?
Cross-check NPI 1588010649 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 2021-10-28.