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Internal Medicine Providers in Los Gatos, CA

Browse 47 Internal Medicine providers listed in NPPES with a practice address in Los Gatos, California.

47 Healthcare Providers

How Los Gatos compares with the U.S.

Los Gatos has 143 clinicians in Internal Medicine per 100,000 residents, 3.2 times the U.S. rate of 44.

That is 47 active clinicians in Internal Medicine with a practice address in Los Gatos, for a population of 32,786.

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.

97% of clinicians in Internal Medicine in Los Gatos listed in the CMS Medicare file (34 of 35) 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.

63% of clinicians in Internal Medicine in Los Gatos listed in the CMS Medicare file (22 of 35) 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 Los Gatos, CA

Source: CMS PECOS
PECOS Enrolled Specialists 40 In Los Gatos, CA
Part B Lab & Imaging Eligible 41 Diagnostic Referrals
DME Ordering Eligible 41 Durable Medical Equipment
Home Health Agency Referrals 41 HHA Ordering Eligible
Showing 1โ€“20 of 47 providers
With recent CMS data first, then Aโ€“Z

Dr. Marsha Feldman Armstrong , MD

Internal Medicine

Active NPI Status
777 Knowles Dr, Suites 6a, Los Gatos, CA 950321417
Phone: 4083703611
NPI Identifier 1417041765
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Janhavi Athavale

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
15400 Los Gatos Blvd, Los Gatos, CA 950322502
Phone: 4085233102
NPI Identifier 1295197317
View Full Profile

Dr. Gopi Ayer , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
14981 National Ave, Ste 6, Los Gatos, CA 950322600
Phone: 4083581811
NPI Identifier 1396701512
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Dr. Mandeep Ayer , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
14981 National Ave, Ste 6, Los Gatos, CA 950322600
Phone: 4083581811
NPI Identifier 1205817111
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Dr. Beverly Barboza , MD

Internal Medicine

Active NPI Status
320 Dardanelli Ln, Suite #26b, Los Gatos, CA 950321440
Phone: 4088666282
NPI Identifier 1679678296
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Dr. Hemalatha Bhamidi , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
14251 Winchester Blvd # 200, Los Gatos, CA 950321811
Phone: 4084265540
NPI Identifier 1225533219
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Dr. Edward Michael Brooks , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
15400 Los Gatos Blvd, Los Gatos, CA 950322502
Phone: 4085233102
NPI Identifier 1831162338
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Dr. Andrew Yintah Chi , MD MPH

Internal Medicine

Active NPI Status Accepts Medicare Assignment
350 De Soto Dr, Los Gatos, CA 950322402
Phone: 4087580680
NPI Identifier 1700861275
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Dr. Jane W. Chien , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
14981 National Ave Ste 6, Los Gatos, CA 950322600
Phone: 4083581811
NPI Identifier 1588620785
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Dr. Sara Farr , MD

Internal Medicine

Active NPI Status
815 Pollard Rd, Los Gatos, CA 950321438
Phone: 4088713289
NPI Identifier 1356562789
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Dr. Ioana Andreia Gheorghiu , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
815 Pollard Rd, Los Gatos, CA 950321438
Phone: 4088713289
NPI Identifier 1598967317
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Dr. Catherine Anne Grellet , MD

Internal Medicine

Active NPI Status
15251 National Ave, Suite 104, Los Gatos, CA 950322400
Phone: 4083587360
NPI Identifier 1053418939
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Dr. Sindhu Novel Gundapuneni , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
16122 Loretta Ln, Los Gatos, CA 950322035
Phone: 3128528979
NPI Identifier 1023469384
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Dr. Darryl Hein , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
15215 National Ave, Suite 200, Los Gatos, CA 950322425
Phone: 4083581841
NPI Identifier 1124077227
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Stacey M Hein , INTERNAL MEDICINE

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
15215 National Ave, Suite 200, Los Gatos, CA 950322425
Phone: 4083581841
NPI Identifier 1568429983
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Dr. Barbara Mah Hom , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
320 Dardanelli Lane, Ste 25b, Los Gatos, CA 950321419
Phone: 4083707801
NPI Identifier 1356388516
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Dr. Mary Jane Hutchins , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
14911 National Ave, Suite 6, Los Gatos, CA 950322632
Phone: 4083588998
NPI Identifier 1134221583
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Vivek Jain

Internal Medicine

Active NPI Status
15000 Los Gatos Blvd Ste 1, Los Gatos, CA 950322017
Phone: 4082563144
NPI Identifier 1750398020
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Dr. Thaichan Jobalia , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
15400 Los Gatos Blvd, Los Gatos, CA 950322502
Phone: 4085233102
NPI Identifier 1578526299
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Dr. Ester Kwok , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
320 Dardanelli Ln Ste 27b, Los Gatos, CA 950321440
Phone: 4083741112
NPI Identifier 1790886034
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Frequently Asked Questions about Internal Medicine in Los Gatos

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.