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Internal Medicine Providers in San Francisco, CA

Browse 1,320 Internal Medicine providers listed in NPPES with a practice address in San Francisco, California.

1,320 Healthcare Providers

How San Francisco compares with the U.S.

San Francisco has 159 clinicians in Internal Medicine per 100,000 residents, 3.6 times the U.S. rate of 44.

That is 1,320 active clinicians in Internal Medicine with a practice address in San Francisco, for a population of 830,235.

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 San Francisco listed in the CMS Medicare file (664 of 698) 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.

41% of clinicians in Internal Medicine in San Francisco listed in the CMS Medicare file (288 of 698) 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 San Francisco, CA

Source: CMS PECOS
PECOS Enrolled Specialists 912 In San Francisco, CA
Part B Lab & Imaging Eligible 938 Diagnostic Referrals
DME Ordering Eligible 980 Durable Medical Equipment
Home Health Agency Referrals 938 HHA Ordering Eligible
Showing 1โ€“20 of 1,320 providers
With recent CMS data first, then Aโ€“Z

Dr. Jacob Aaron , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
3555 Cesar Chavez, San Francisco, CA 941104403
Phone: 4156006000
NPI Identifier 1407202518
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Dr. Luba Natalie Abascal , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2200 Ofarrell St, San Francisco, CA 941153357
Phone: 4158332000
NPI Identifier 1023180874
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Dr. Elizabeth Sarah Abbs , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1001 Potrero Ave, San Francisco, CA 941103518
Phone: 4152065124
NPI Identifier 1295269983
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Dr. Brittany Tamar Abel , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
505 Parnassus Ave Rm M-1480, San Francisco, CA 941432204
Phone: 4154761529
NPI Identifier 1144859927
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Dr. Rebecca A Abelman , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1001 Potrero Ave Bldg 25, San Francisco, CA 941103518
Phone: 6282068000
NPI Identifier 1205364072
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Dr. Jesse Forrest Abelson , MD

Internal Medicine

Active NPI Status
505 Parnassus Ave, San Francisco, CA 941432204
Phone: 4155024107
NPI Identifier 1083843817
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Dr. Anna Kertser Abramson , MD

Internal Medicine

Active NPI Status
4150 Clement St, San Francisco, CA 941211563
Phone: 4152214810
NPI Identifier 1346424785
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Meredith Adamo

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
230 Golden Gate Ave, San Francisco, CA 941023706
Phone: 4153557400
NPI Identifier 1962906941
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Dr. Joshua S Adler , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
400 Parnassus Ave, San Francisco, CA 941432202
Phone: 4153534624
NPI Identifier 1194781351
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Dr. Paul Adler , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2238 Geary Blvd, San Francisco, CA 941153416
Phone: 4158332200
NPI Identifier 1568889772
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Dr. Anousheh Afjei , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1100 Van Ness Ave, San Francisco, CA 941096978
Phone: 4156003458
NPI Identifier 1992365431
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Dr. Nima Afshar , MD

Internal Medicine

Active NPI Status
3580 California St Ste 101, San Francisco, CA 941181716
Phone: 4158303090
NPI Identifier 1366539843
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Dr. Rahul Aggarwal , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
505 Parnassus Ave, Room M987, San Francisco, CA 941432204
Phone: 4154761000
NPI Identifier 1174794309
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Dr. Shahab Aghamir , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
375 Laguna Honda Blvd, San Francisco, CA 941161411
Phone: 6507422100
NPI Identifier 1275778243
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Dr. Mohammed Osman Ahmed , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1100 Van Ness Ave, San Francisco, CA 941096978
Phone: 4156003438
NPI Identifier 1700245115
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Dr. Nawal Ahmed Khan , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
333 1st St Ste A, San Francisco, CA 941052661
Phone: 8888033370
NPI Identifier 1962727818
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Dr. Lesley A. Aiken , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
2200 Ofarrell St, San Francisco, CA 941153357
Phone: 4158332000
NPI Identifier 1629156120
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Dr. Sarah C Alba-Nguyen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
505 Parnassus Ave, San Francisco, CA 94143
Phone: 4153539111
NPI Identifier 1972893188
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Dr. Lydia Chryssa Alexander , MD

Internal Medicine

Active NPI Status
2425 Geary Blvd, San Francisco, CA 941153358
Phone: 4158332000
NPI Identifier 1578717237
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Dr. Sarvenaz Alibeigi , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
601 Van Ness Ave, San Francisco, CA 941023200
Phone: 4155319047
NPI Identifier 1639504251
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Frequently Asked Questions about Internal Medicine in San Francisco

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.