Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Zachary Parnell Giesen, DO

Cardiovascular Disease Physician in Medford, OR · enumerated 2016.

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

National Provider Identifier

1083077408

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Registry record

Entity type Individual (Type 1)

Name Zachary Parnell Giesen

Credential DO

Sex Male

Practice address 520 Medical Center Dr Ste 200, Medford, OR, 97504

Phone (541) 930-7222

Fax (541) 930-7220

Enumeration date Apr 2, 2016

Last updated in NPPES Jul 29, 2022

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License DO209735 (OR) 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
500806325	Medicaid	OR	-

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

What is the NPI number for Zachary Giesen?

The National Provider Identifier (NPI) for Zachary Giesen is 1083077408, a Type 1 (individual) record in the CMS NPPES registry.

Where does Zachary Giesen practice?

The practice location on file with NPPES is in Medford, OR. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-29.