NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Steven P Mccarthy, M.D.

Internal Medicine Physician in Thousand Oaks, CA · enumerated 2006.

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

National Provider Identifier

1497765309

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Steven P Mccarthy
Credential M.D.
Sex Male
Practice address 100 Moody Ct Ste 200, Thousand Oaks, CA, 91360
Fax (805) 418-3505
Enumeration date Aug 9, 2006
Last updated in NPPES Oct 29, 2020

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036-100825 (IL) Primary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License C168171 (CA) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
036100825 Medicaid IL -
036100825 Other IL STATE LICENSE

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 Steven Mccarthy practice?
The practice location on file with NPPES is in Thousand Oaks, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Steven Mccarthy?
The National Provider Identifier (NPI) for Steven Mccarthy is 1497765309, 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 2020-10-29.