Steven P. McCarthy, M.D.
Internal Medicine Physician · Thousand Oaks, CA
Steven P. McCarthy, M.D. is an internal medicine physician with a practice address in Thousand Oaks, California, and NPI 1497765309, issued on Aug 9, 2006. Check the license (California C168171, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steven P. McCarthy
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- C168171 CA
036-100825 IL
Self-reported in NPPES; status is on the state search - Practice location
- 100 Moody CT Ste 200, Thousand Oaks, CA 91360
- Phone
- (805) 418-3500
- Enumerated
- Aug 9, 2006
- Record last updated
- Oct 29, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (805) 418-3505
- Medicaid ID
- 036100825 IL
- Medicare enrollment
- Enrolled (PECOS I20200311001091); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 100 Moody CT Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Michael Dorsi, MDNeurological Surgery Physician1942355854
Verify Steven P. McCarthy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C168171Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% more Medicare Part D claims than the average internal medicine physician in 2024
5,528 Medicare Part D claims for 541 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 112 claims were for opioids.
Most prescribed
- Atorvastatin Calcium400 claims
- Losartan Potassium279 claims
- Amlodipine Besylate278 claims
- Levothyroxine Sodium227 claims
- Alprazolam145 claims
- Lisinopril134 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- The Regents OF The University OF CaliforniaThousand Oaks, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven P. McCarthy among 17,696 internal medicine physician records in California
Steven P. McCarthy, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1996 · median 2004 among the 11,065 with a school on file
- Record last updated2020 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
62 internal medicine physician records list a practice address in Thousand Oaks
They are 62 of the 2,434 NPPES records with a practice address in Thousand Oaks, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Thousand Oaks → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jose-Nitram Aliling, M.D.Thousand Oaks, CA 913601912177759
- Manoj Aswani, M.D.Thousand Oaks, CA 913601801848825
- Pedram Bagheri, MDThousand Oaks, CA 913601578785275
- Russell Hines, M.D.Thousand Oaks, CA 913601548213101
- Christina Jacob, M.D.Thousand Oaks, CA 913601497758957
- Bernard Klein, M.D.Thousand Oaks, CA 913601831382738
- Jane Lindberg, MDThousand Oaks, CA 913601467548149
- Francoise Menteer, MDThousand Oaks, CA 913601114939006
Common questions
What is Steven P. McCarthy, M.D.'s NPI number?
Steven P. McCarthy, M.D.'s National Provider Identifier (NPI) is 1497765309, issued on Aug 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steven P. McCarthy, M.D. located?
The NPPES record lists a practice address at 100 Moody CT Ste 200, Thousand Oaks, CA, 91360. Phone: (805) 418-3500. Providers update this record themselves, so call before visiting.
How can I verify Steven P. McCarthy, M.D.'s license?
NPPES lists California license number C168171, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Steven P. McCarthy, M.D. prescribe under Medicare Part D?
In 2024, Steven P. McCarthy, M.D. had 5,528 Medicare Part D claims for 541 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.