NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Kenneth Harry Markiewicz, DO

Otolaryngology Physician in Carson City, MI · enumerated 2006.

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

National Provider Identifier

1851359178

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Kenneth Harry Markiewicz
Credential DO
Sex Male
Practice address 102 S 3rd St, Ste 200, Carson City, MI, 48811
Phone (989) 584-0932
Fax (989) 584-0918
Enumeration date May 3, 2006
Last updated in NPPES Mar 20, 2016

Taxonomy & licenses

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License 5101007662 (MI) 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
0454111024 Other MI BCBSM
1642877 Medicaid MI -

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 Kenneth Markiewicz's NPI record?
Cross-check NPI 1851359178 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1851359178 active?
Yes, as of the latest NPPES snapshot, NPI 1851359178 is active (record last updated 2016-03-20).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-03-20.