Internal Medicine Providers in Thousand Oaks, CA
Browse 62 Internal Medicine providers listed in NPPES with a practice address in Thousand Oaks, California.
How Thousand Oaks compares with the U.S.
Thousand Oaks has 50 clinicians in Internal Medicine per 100,000 residents, 11% higher than the U.S. rate of 44.
That is 62 active clinicians in Internal Medicine with a practice address in Thousand Oaks, for a population of 125,205.
That is close to the California rate of 45.
What these numbers mean
Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.
A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.
City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places.
95% of clinicians in Internal Medicine in Thousand Oaks listed in the CMS Medicare file (39 of 41) accept Medicare assignment. That is similar to the California share of 96%.
What is Medicare assignment?
A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.
Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.
37% of clinicians in Internal Medicine in Thousand Oaks listed in the CMS Medicare file (15 of 41) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is similar to the California share of 38%.
About the telehealth indicator
The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.
These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.
Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology
Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).
Internal Medicine Medicare (PECOS) Enrollment & Ordering Eligibility
Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine practitioners in Thousand Oaks, CA
Hazel Abaya
Internal Medicine
Diana Alavi
Internal Medicine
Dr. Jose-Nitram Pangilinan Aliling , MD
Internal Medicine
Dr. Manoj Aswani , MD
Internal Medicine
Saro Avedikian
Internal Medicine
Setrak Manouk Missak Azrenkassian
Internal Medicine
Dr. Pedram Bagheri , MD
Internal Medicine
Dr. Dzenana Cabaravdic , MD
Internal Medicine
Dr. Nakul Chopra , MD, MPH, MBA
Internal Medicine
Dr. Joseph Detweiler , MD
Internal Medicine
Dr. Mounir El Fatmi , MD
Internal Medicine
Dr. Jinous Etemadi , MD
Internal Medicine
Dr. Zoya Furman , MD
Internal Medicine
Dr. Jigar Popatlal Ghelani , MD
Internal Medicine
Dr. Robert A Gold , MD
Internal Medicine
Dr. Nazanin Izadpanah Gunn , MD, MHA
Internal Medicine
Dr. Farhad Hashmi , MD
Internal Medicine
Neema Heivand
Internal Medicine
Dr. Russell Hines , MD
Internal Medicine
Dr. Harendra Ipalawatte , MD
Internal Medicine
Frequently Asked Questions about Internal Medicine in Thousand Oaks
Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the California licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.
This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.
Other Specialties in Thousand Oaks
- Student in an Organized Health Care Education/Training Program 217
- Physical Therapist 107
- Pharmacist 71
- Chiropractor 56
- Dentist - General Practice 50
- Dentist 44
- Nurse Practitioner - Family 42
- Physician Assistant 40
- Occupational Therapist 29
- Psychologist - Clinical 27
- Specialist 25
- Physical Therapist - Orthopedic 23
Internal Medicine Providers in Other California Cities
Cities with the most listed practitioners first.