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Internal Medicine Providers in Mission Viejo, CA

Browse 58 Internal Medicine providers listed in NPPES with a practice address in Mission Viejo, California.

58 Healthcare Providers

How Mission Viejo compares with the U.S.

Mission Viejo has 63 clinicians in Internal Medicine per 100,000 residents, about 1.4 times the U.S. rate of 44.

That is 58 active clinicians in Internal Medicine with a practice address in Mission Viejo, for a population of 92,151.

The California rate is 45 per 100,000 residents.

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. Cities with hospitals or large medical centers often list more specialists than the number of residents alone would suggest, because patients also come from nearby areas.

95% of clinicians in Internal Medicine in Mission Viejo 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.

61% of clinicians in Internal Medicine in Mission Viejo listed in the CMS Medicare file (25 of 41) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than 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 Mission Viejo, CA

Source: CMS PECOS
PECOS Enrolled Specialists 48 In Mission Viejo, CA
Part B Lab & Imaging Eligible 48 Diagnostic Referrals
DME Ordering Eligible 50 Durable Medical Equipment
Home Health Agency Referrals 48 HHA Ordering Eligible
Showing 1โ€“20 of 58 providers
With recent CMS data first, then Aโ€“Z

Dr. Samir Abed Ahmad , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
27800 Medical Center Rd Ste 109, Mission Viejo, CA 926916410
Phone: 9498663600
NPI Identifier 1497710545
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Dr. Saba Akhtar , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
26800 Crown Valley Pkwy Ste 305, Mission Viejo, CA 926918017
Phone: 9493646000
NPI Identifier 1104112440
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Dr. Reza Allamehzadeh , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
25982 Pala Ste 170, Mission Viejo, CA 926916736
Phone: 9495812002
NPI Identifier 1467606053
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Dr. Bahman Badie , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
26800 Crown Valley Pkwy, Suite 315, Mission Viejo, CA 926916384
Phone: 9493646000
NPI Identifier 1396721916
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Dr. Mehrnaz Badie , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
26800 Crown Valley Pkwy, Suite 325, Mission Viejo, CA 926916384
Phone: 9493646000
NPI Identifier 1831212885
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Dr. Eric Olson Benner , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
26800 Crown Valley Pkwy Ste 315, Mission Viejo, CA 926918039
Phone: 9493646000
NPI Identifier 1063648343
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Dr. Vrinda Bhasin , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
27799 Medical Center Rd Ste 460, Mission Viejo, CA 926916400
Phone: 9493652387
NPI Identifier 1740660133
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Dr. Helen Ching-Yei Chang , MD

Internal Medicine

Active NPI Status
25982 Pala, Suite 250, Mission Viejo, CA 926916719
Phone: 9495880051
NPI Identifier 1639134687
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Dr. Ronnie Nathan Dawood , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
26342 Oso Pkwy, Suite 204, Mission Viejo, CA 926915645
Phone: 9493671115
NPI Identifier 1851593065
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Dr. Afshin Y Doust , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
26732 Crown Valley Pkwy Ste 411, Mission Viejo, CA 926916375
Phone: 9492821671
NPI Identifier 1417057316
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Dr. Sherif M El Sokkary , MD

Internal Medicine

Active NPI Status
26800 Crown Valley Pkwy, Suite 315, Mission Viejo, CA 926916384
Phone: 9493646000
NPI Identifier 1710964432
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Dr. Erik Finlayson , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
26732 Crown Valley Pkwy Ste 170, Mission Viejo, CA 926916337
Phone: 9493652444
NPI Identifier 1942470893
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Dr. Kelly Elizabeth Fordyce , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
26800 Crown Valley Pkwy, Suite 305, Mission Viejo, CA 926916384
Phone: 9493646000
NPI Identifier 1477531481
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Dr. Huan Guu , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
27700 Medical Center Rd, Mission Viejo, CA 926916426
Phone: 9493641400
NPI Identifier 1952352668
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Dr. Mark D Hauptman , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
26991 Crown Valley Pkwy Ste 100, Mission Viejo, CA 926916511
Phone: 9495825430
NPI Identifier 1801873427
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Dr. Ghassan Kabbach , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
27700 Medical Center Rd, Mission Viejo, CA 926916426
Phone: 9493652468
NPI Identifier 1730596040
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Dr. Bahareh Bahadori Khavarian , MD

Internal Medicine

Active NPI Status
27725 Santa Margarita Pkwy, Suite 108, Mission Viejo, CA 926916704
Phone: 9499168770
NPI Identifier 1780620328
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Dr. David Brian Kovacs , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
26800 Crown Valley Pkwy, Suite 330, Mission Viejo, CA 926916384
Phone: 9493647246
NPI Identifier 1861633083
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Dr. Raymond E Kwa , MD

Internal Medicine

Active NPI Status
26800 Crown Valley Pkwy, Suite 315, Mission Viejo, CA 926916384
Phone: 9493646000
NPI Identifier 1609853092
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Dr. Alyssa Khanh-Van Le , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
26800 Crown Valley Pkwy, Suite 315, Mission Viejo, CA 926916384
Phone: 9493646000
NPI Identifier 1245461722
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Frequently Asked Questions about Internal Medicine in Mission Viejo

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.