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

Karen Zemplenyi, DDS, MD

Oral and Maxillofacial Surgery (Dentist) in Kirkland, WA · enumerated 2015 · practices at Knoff & Fettig, Ps.

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

National Provider Identifier

1801289319

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Registry record

Entity type Individual (Type 1)
Name Karen Zemplenyi
Credential DDS, MD
Sex Female
Practice address Kirkland, WA, 98034
Phone (425) 821-7979
Enumeration date Mar 7, 2015
Last updated in NPPES Sep 29, 2021

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

Taxonomy & licenses

1223S0112X Oral and Maxillofacial Surgery (Dentist) Dental Providers · License MD61157248 (WA) Secondary
204E00000X Oral & Maxillofacial Surgery (D.M.D.) Allopathic & Osteopathic Physicians · License MDRE.ML.60875753 (WA) Secondary
204E00000X Oral & Maxillofacial Surgery (D.M.D.) Allopathic & Osteopathic Physicians · License 60555334 (WA) Secondary
208600000X Surgery Physician Allopathic & Osteopathic Physicians · License MD61157248 (WA) Secondary
390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
1223S0112X Oral and Maxillofacial Surgery (Dentist) Dental Providers · License DE61002648 (WA) Primary
DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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 1801289319 active?
Yes, as of the latest NPPES snapshot, NPI 1801289319 is active (record last updated 2021-09-29).
How do I verify Karen Zemplenyi's NPI record?
Cross-check NPI 1801289319 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 2021-09-29.