NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael C Chase, MD

Internal Medicine Physician in Sausalito, CA · enumerated 2006.

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

National Provider Identifier

1457423105

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Michael C Chase
Credential MD
Sex Male
Practice address 3 Harbor Dr Ste 111, Sausalito, CA, 94965
Phone (415) 683-2988
Fax (415) 683-2980
Enumeration date Nov 15, 2006
Last updated in NPPES Oct 27, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G25829 (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 Michael Chase practice?
The practice location on file with NPPES is in Sausalito, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Michael Chase?
The National Provider Identifier (NPI) for Michael Chase is 1457423105, 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 2025-10-27.