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

Dr. Michael John Mierzejewski, DMD

Dentist in Federal Heights, CO · enumerated 2007 · practices at Dr. Gerald W Trammell P.C..

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

National Provider Identifier

1063555043

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael John Mierzejewski

Credential DMD

Sex Male

Practice address Federal Heights, CO, 80260

Phone (303) 427-2722

Fax (303) 427-9280

Enumeration date Feb 15, 2007

Last updated in NPPES Jan 8, 2014

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 5133 (NV) Secondary

122300000X Dentist Dental Providers · License 5133 (NV) Secondary

122300000X Dentist Dental Providers · License 10703 (CO) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1063555043 active?

Yes, as of the latest NPPES snapshot, NPI 1063555043 is active (record last updated 2014-01-08).

How do I verify Michael Mierzejewski's NPI record?

Cross-check NPI 1063555043 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Dr. Gerald W Trammell P.C. Oral and Maxillofacial Surgery (Dentist) · Federal Heights, CO NPI 1669746889 Arthur Abercrombie Dentist · Federal Heights, CO NPI 1477986404 Brittney Scott Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist · Westminster, CO NPI 1720636426

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-08.