NPI Portal NPI Lookup & Verification

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

Dr. Cassidy Jezlyn Bummer, DDS

General Practice Dentistry in Poplar, MT · enumerated 2022 · practices at Indian Health Service.

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

National Provider Identifier

1558094813

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Cassidy Jezlyn Bummer
Credential DDS
Sex Female
Practice address Poplar, MT, 59255
Phone (406) 768-3491
Fax (406) 768-3603
Enumeration date Jul 5, 2022
Last updated in NPPES Jul 29, 2025

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License DEN-DEN-LIC-23705 (MT) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Cassidy Bummer practice?
The practice location on file with NPPES is in Poplar, MT. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Cassidy Bummer?
The National Provider Identifier (NPI) for Cassidy Bummer is 1558094813, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-29.