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Internal Medicine Providers in Sunnyvale, CA

Browse 48 Internal Medicine providers listed in NPPES with a practice address in Sunnyvale, California.

48 Healthcare Providers

How Sunnyvale compares with the U.S.

Sunnyvale has 31 clinicians in Internal Medicine per 100,000 residents, about 70% of the U.S. rate of 44.

That is 48 active clinicians in Internal Medicine with a practice address in Sunnyvale, for a population of 154,236.

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.

97% of clinicians in Internal Medicine in Sunnyvale listed in the CMS Medicare file (33 of 34) 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.

79% of clinicians in Internal Medicine in Sunnyvale listed in the CMS Medicare file (27 of 34) 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 Sunnyvale, CA

Source: CMS PECOS
PECOS Enrolled Specialists 37 In Sunnyvale, CA
Part B Lab & Imaging Eligible 38 Diagnostic Referrals
DME Ordering Eligible 38 Durable Medical Equipment
Home Health Agency Referrals 38 HHA Ordering Eligible
Showing 1โ€“20 of 48 providers
With recent CMS data first, then Aโ€“Z

Dr. Zubia Syed Ahmad , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
301 Old San Francisco Rd, Sunnyvale, CA 940866386
Phone: 4087304360
NPI Identifier 1265879522
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Dr. Syed Salman Ali , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
301 Old San Francisco Rd, Sunnyvale, CA 940866386
Phone: 4087304360
NPI Identifier 1740621671
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Aisha Amin

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
301 Old San Francisco Rd, Sunnyvale, CA 940866386
Phone: 7183342488
NPI Identifier 1013440981
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Dr. Aparna Batlapenumarthy , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
301 Old San Francisco Rd, Sunnyvale, CA 940866386
Phone: 4087304360
NPI Identifier 1598947962
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Dr. Sneha Bhamre , MD, MPH

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
301 Old San Francisco Rd, Sunnyvale, CA 940866386
Phone: 4087304360
NPI Identifier 1871169896
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Dr. Priya Bhusri , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
401 Old San Francisco Rd, Sunnyvale, CA 940866386
Phone: 4087304360
NPI Identifier 1659386019
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Dr. Chung-Wei Chan , MD

Internal Medicine

Active NPI Status
803 Eleventh Ave, Sunnyvale, CA 940894731
Phone: 6502271150
NPI Identifier 1972820793
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Dr. Chung-Ying Amanda Chen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
401 Old San Francisco Rd, Sunnyvale, CA 940866387
Phone: 4087304262
NPI Identifier 1457436081
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Dr. Leon Cheng , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
401 Old San Francisco Rd, Sunnyvale, CA 940866387
Phone: 4087304262
NPI Identifier 1104834407
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Dr. Teresa Cheng , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
401 Old San Francisco Rd, Sunnyvale, CA 940866387
Phone: 4087304360
NPI Identifier 1598772857
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Dr. Anne Elizabeth Cole , MD

Internal Medicine

Active NPI Status
877 W Fremont Ave, Suite N-1, Sunnyvale, CA 940872315
Phone: 6509692959
NPI Identifier 1922188945
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Dr. Peter Fay , MD

Internal Medicine

Active NPI Status
660 S Fair Oaks Ave, Evc Internal Medicine Clinic, Sunnyvale, CA 940867913
Phone: 4089924858
NPI Identifier 1154384337
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Nikita Fernandes

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
301 Old San Francisco Rd, Sunnyvale, CA 940866386
Phone: 4087304270
NPI Identifier 1730612581
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Dr. Anitha Gundupalli , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
301 Old San Francisco Rd, Sunnyvale, CA 940866386
Phone: 4083660595
NPI Identifier 1568571206
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Dr. Grace Guo , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
401 Old San Francisco Rd, Sunnyvale, CA 940866387
Phone: 4087304360
NPI Identifier 1902811375
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Dr. Mehran Jamali , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
545 Morse Ave, Sunnyvale, CA 940853653
Phone: 6502830611
NPI Identifier 1356874143
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Dr. Kimberly Natee Kanada , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
401 Old San Francisco Rd, Sunnyvale, CA 940866367
Phone: 6509347676
NPI Identifier 1912265752
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Dr. Euna Kim , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
301 Old San Francisco Rd, Sunnyvale, CA 940866386
Phone: 4087304251
NPI Identifier 1962081463
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Dr. James William Larrick , MD PHD

Internal Medicine

Active NPI Status
1230 Bordeaux Dr, Sunnyvale, CA 940891202
Phone: 4152636311
NPI Identifier 1275960783
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Dr. Su-May Lee , MD

Internal Medicine

Active NPI Status
1299 Oakmead Pkwy, Sunnyvale, CA 940854040
Phone: 4085204510
NPI Identifier 1043360852
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Frequently Asked Questions about Internal Medicine in Sunnyvale

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.