NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Matthew Bayer, MD

Emergency Medicine Physician in Madera, CA · enumerated 2007.

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

National Provider Identifier

1245370147

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Matthew Bayer
Credential MD
Sex Male
Practice address 9300 Valley Childrens Pl, Madera, CA, 93638
Phone (330) 493-4443
Enumeration date Feb 8, 2007
Last updated in NPPES Jul 28, 2022

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License G76944 (CA) 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 Matthew Bayer practice?
The practice location on file with NPPES is in Madera, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Matthew Bayer?
The National Provider Identifier (NPI) for Matthew Bayer is 1245370147, 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 2022-07-28.