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Internal Medicine Providers in Fairfield, CA

Browse 55 Internal Medicine providers listed in NPPES with a practice address in Fairfield, California.

55 Healthcare Providers

How Fairfield compares with the U.S.

Fairfield has 46 clinicians in Internal Medicine per 100,000 residents, close to the U.S. rate of 44.

That is 55 active clinicians in Internal Medicine with a practice address in Fairfield, for a population of 120,785.

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.

100% of clinicians in Internal Medicine in Fairfield listed in the CMS Medicare file (33 of 33) 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.

55% of clinicians in Internal Medicine in Fairfield listed in the CMS Medicare file (18 of 33) 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 Fairfield, CA

Source: CMS PECOS
PECOS Enrolled Specialists 45 In Fairfield, CA
Part B Lab & Imaging Eligible 45 Diagnostic Referrals
DME Ordering Eligible 46 Durable Medical Equipment
Home Health Agency Referrals 45 HHA Ordering Eligible
Showing 1โ€“20 of 55 providers
With recent CMS data first, then Aโ€“Z

Dr. Amanda Catrice Adkins , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2458 Hilborn Rd, Fairfield, CA 945341072
Phone: 7076465500
NPI Identifier 1568635704
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Dr. Sumera Ahmed , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
2201 Courage Dr, Fairfield, CA 94533
Phone: 7075535938
NPI Identifier 1134180219
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Dr. Nail Amro , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1200 B Gale Wilson Blvd, Fairfield, CA 945333552
Phone: 7074293600
NPI Identifier 1861413551
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Dr. Josefina Pineda Arenas , MD

Internal Medicine

Active NPI Status
3700 Hilborn Rd, Ste. 200, Fairfield, CA 945347946
Phone: 7074220900
NPI Identifier 1518926484
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Dr. Salimah Boghani , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1200 B Gale Wilson Blvd, Fairfield, CA 945333552
Phone: 7076465000
NPI Identifier 1689711293
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Dr. Clarisse Elaine Cadang , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4520 Business Center Dr Ste 200, Fairfield, CA 945346888
Phone: 7076463500
NPI Identifier 1588083075
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Dr. Myo Swe Chang , MD

Internal Medicine

Active NPI Status
103 Bodin Cir, Bld 778, Fairfield, CA 945351801
Phone: 7074371817
NPI Identifier 1003899279
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Dr. Larissa Chartrand , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4520 Business Center Drive, 200, Fairfield, CA 94534
Phone: 7076465500
NPI Identifier 1851715627
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Dr. Eric J. Crisostomo , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1550 Gateway Blvd, Fairfield, CA 945336901
Phone: 7074274000
NPI Identifier 1689752412
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Dr. Gurpreet S. Dhugga , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
5030 Business Center Dr, Ste # 130, Fairfield, CA 945346874
Phone: 7078641056
NPI Identifier 1356429161
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Dr. Shulan Ding , MD

Internal Medicine

Active NPI Status
1550 Gateway Blvd, Fairfield, CA 945336901
Phone: 7074274000
NPI Identifier 1811075351
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Dr. Ankit Dubey , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4520 Business Center Dr Ste 200, Fairfield, CA 945346888
Phone: 7076465500
NPI Identifier 1275191249
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Yoseph Elala

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1200 B Gale Wilson Blvd, Fairfield, CA 945333552
Phone: 8662827905
NPI Identifier 1336594373
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Dr. Richard Lewis Fleming , MD

Internal Medicine

Active NPI Status
4665 Business Center Dr, Fairfield, CA 945341675
Phone: 7078634501
NPI Identifier 1831277722
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Dr. Ella Aseemjot Gupta , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2720 Low Ct, Fairfield, CA 945349771
Phone: 7074282745
NPI Identifier 1811157126
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Dr. Svetlana T Gutierrez , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1200 B Gale Wilson Blvd, Fairfield, CA 945333552
Phone: 7076465080
NPI Identifier 1619990637
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Dr. James Horodyski , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1200 B Gale Wilson Blvd, Fairfield, CA 945333552
Phone: 7074293600
NPI Identifier 1184710063
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Dr. Georgina Jensen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1550 Gateway Blvd, Fairfield, CA 945336901
Phone: 7074274000
NPI Identifier 1891873634
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Dr. Yashna Lamsal , DO

Internal Medicine

Active NPI Status
2470 Hilborn Rd Ste 200, Fairfield, CA 945341103
Phone: 7076465500
NPI Identifier 1477257699
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Dr. Thuy-Tien Ba Le , MD, MPH

Internal Medicine

Active NPI Status Accepts Medicare Assignment
2702 Low Ct, Fairfield, CA 945349771
Phone: 7074322777
NPI Identifier 1821418302
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Frequently Asked Questions about Internal Medicine in Fairfield

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.