NPI Portal NPI Lookup & Verification

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

Katherine Zieman, N.D.

Naturopath in Gresham, OR · enumerated 2006.

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

National Provider Identifier

1578504197

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Registry record

Entity type Individual (Type 1)
Name Katherine Zieman
Credential N.D.
Sex Female
Practice address Gresham, OR, 97030
Phone (503) 492-1221
Fax (503) 200-1094
Enumeration date Jun 8, 2006
Last updated in NPPES Jan 14, 2020

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

Taxonomy & licenses

176B00000X Midwife Other Service Providers · License MW00000181 (WA) Secondary
176B00000X Midwife Other Service Providers · License 54 (OR) Secondary
175F00000X Naturopath Other Service Providers · License 0799 (OR) Primary

Other identifiers

Identifier Type State Issuer
7126659 Other WA WA PROVIDER ID
2145248 Medicaid WA -
825892000 Other OR BCBS
MW00000181 Other OR WA MIDWIFE
126669 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

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Katherine Zieman?
Katherine Zieman is registered in NPPES with the primary taxonomy of Naturopath. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-01-14.