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Internal Medicine Providers in Thousand Oaks, CA

Browse 62 Internal Medicine providers listed in NPPES with a practice address in Thousand Oaks, California.

62 Healthcare Providers

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

Source: CMS PECOS
PECOS Enrolled Specialists 47 In Thousand Oaks, CA
Part B Lab & Imaging Eligible 47 Diagnostic Referrals
DME Ordering Eligible 48 Durable Medical Equipment
Home Health Agency Referrals 47 HHA Ordering Eligible
Showing 1โ€“20 of 62 providers
With recent CMS data first, then Aโ€“Z

Hazel Abaya

Internal Medicine

Active NPI Status Accepts Medicare Assignment
2190 Lynn Rd Ste 300, Thousand Oaks, CA 913608024
Phone: 8053704802
NPI Identifier 1780116186
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Diana Alavi

Internal Medicine

Active NPI Status
3180 Willow Ln Ste 114, Thousand Oaks, CA 913614984
Phone: 8182328432
NPI Identifier 1700276680
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Active NPI Status Accepts Medicare Assignment
100 Moody Ct Ste 200, Thousand Oaks, CA 913606082
Phone: 8054183500
NPI Identifier 1912177759
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Dr. Manoj Aswani , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2230 Lynn Rd, Suite 200, Thousand Oaks, CA 913601901
Phone: 8054951066
NPI Identifier 1801848825
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Saro Avedikian

Internal Medicine

Active NPI Status
215 W Janss Rd, Thousand Oaks, CA 913601847
Phone: 8053704733
NPI Identifier 1740869098
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Active NPI Status Accepts Medicare Assignment
215 W Janss Rd, Thousand Oaks, CA 913601847
Phone: 8054972727
NPI Identifier 1265010920
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Dr. Pedram Bagheri , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1534 N Moorpark Rd, 291, Thousand Oaks, CA 913605129
Phone: 8054971800
NPI Identifier 1578785275
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Dr. Dzenana Cabaravdic , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
215 W Janss Rd, Thousand Oaks, CA 913601847
Phone: 8054972727
NPI Identifier 1063152882
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Dr. Nakul Chopra , MD, MPH, MBA

Internal Medicine

Active NPI Status Accepts Medicare Assignment
215 W Janss Rd, Thousand Oaks, CA 913601847
Phone: 8054972727
NPI Identifier 1346828274
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Dr. Joseph Detweiler , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
215 W Janss Rd, Thousand Oaks, CA 913601847
Phone: 8054972727
NPI Identifier 1902484850
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Dr. Mounir El Fatmi , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
3299 Rikkard Dr, Thousand Oaks, CA 913624625
Phone: 2016588265
NPI Identifier 1356406789
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Dr. Jinous Etemadi , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
365 E Hillcrest Dr, Thousand Oaks, CA 913605820
Phone: 8885153500
NPI Identifier 1821431784
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Dr. Zoya Furman , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
3180 Willow Ln Ste 102, Ste 102, Thousand Oaks, CA 913614900
Phone: 8054948520
NPI Identifier 1083635205
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Dr. Jigar Popatlal Ghelani , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
375 Rolling Oaks Dr Ste 140, Thousand Oaks, CA 913611001
Phone: 8054966051
NPI Identifier 1699823609
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Dr. Robert A Gold , MD

Internal Medicine

Active NPI Status
45 North Erbes Road, Thousand Oaks, CA 913625802
Phone: 8184043200
NPI Identifier 1164489456
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Dr. Nazanin Izadpanah Gunn , MD, MHA

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
100 Moody Ct, Suite 200, Thousand Oaks, CA 913606077
Phone: 8054183500
NPI Identifier 1306165857
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Dr. Farhad Hashmi , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
215 W Janss Rd, Thousand Oaks, CA 913601847
Phone: 8053704733
NPI Identifier 1427636372
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Neema Heivand

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
100 Moody Ct Ste 200, Thousand Oaks, CA 913606082
Phone: 8054183500
NPI Identifier 1952667040
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Dr. Russell Hines , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
2230 Lynn Rd, Suite 200, Thousand Oaks, CA 913601901
Phone: 8054951066
NPI Identifier 1548213101
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Dr. Harendra Ipalawatte , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
215 W Janss Rd, Thousand Oaks, CA 913601847
Phone: 8054972727
NPI Identifier 1326788142
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Frequently Asked Questions about Internal Medicine in Thousand Oaks

How do I check a Internal Medicine practitioner's license?

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.

Why is a practitioner missing from this list?

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.