Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael W. Brennan, M.D.

Cardiovascular Disease Physician in Sheridan, WY · enumerated 2006.

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

National Provider Identifier

1619903705

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Michael W. Brennan

Credential M.D.

Sex Male

Practice address 1333 West 5th St, Ste 103, Sheridan, WY, 82801

Phone (307) 675-4610

Fax (307) 675-4615

Enumeration date Jun 23, 2006

Last updated in NPPES Apr 8, 2021

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 6651 (MT) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 4505A (WY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 Michael Brennan practice?

The practice location on file with NPPES is in Sheridan, WY. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Michael Brennan?

The National Provider Identifier (NPI) for Michael Brennan is 1619903705, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-08.