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Internal Medicine Providers in Walnut Creek, CA

Browse 183 Internal Medicine providers listed in NPPES with a practice address in Walnut Creek, California.

183 Healthcare Providers

How Walnut Creek compares with the U.S.

Walnut Creek has 261 clinicians in Internal Medicine per 100,000 residents, 5.9 times the U.S. rate of 44.

That is 183 active clinicians in Internal Medicine with a practice address in Walnut Creek, for a population of 70,088.

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.

99% of clinicians in Internal Medicine in Walnut Creek listed in the CMS Medicare file (120 of 121) 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.

26% of clinicians in Internal Medicine in Walnut Creek listed in the CMS Medicare file (31 of 121) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower 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 Walnut Creek, CA

Source: CMS PECOS
PECOS Enrolled Specialists 157 In Walnut Creek, CA
Part B Lab & Imaging Eligible 159 Diagnostic Referrals
DME Ordering Eligible 161 Durable Medical Equipment
Home Health Agency Referrals 159 HHA Ordering Eligible
Showing 1โ€“20 of 183 providers
With recent CMS data first, then Aโ€“Z

Dr. Joel Christopher Acab , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
320 Lennon Ln, Walnut Creek, CA 945982419
Phone: 9259062040
NPI Identifier 1518405661
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Dr. Viviane D Alfandary , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1220 Rossmoor Pkwy, Walnut Creek, CA 945952501
Phone: 9259473393
NPI Identifier 1053338095
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Dr. Stefanie Altmann , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
100 Pringle Ave Ste 425, Walnut Creek, CA 945967385
Phone: 9259323800
NPI Identifier 1912494188
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Megha Ambati

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1220 Rossmoor Pkwy, Walnut Creek, CA 94595
Phone: 9259473312
NPI Identifier 1083849111
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Dr. Sohrab Amiri , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1220 Rossmoor Pkwy, Walnut Creek, CA 945952501
Phone: 9259473393
NPI Identifier 1811420243
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Dr. Kapil Anand , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1425 S Main St, Walnut Creek, CA 945965318
Phone: 4077562150
NPI Identifier 1912393281
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Dr. Anthony J. Arroyo , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1425 S Main St, Walnut Creek, CA 945965318
Phone: 9252954000
NPI Identifier 1376621458
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Patricia Anne Santos Atal

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1425 S Main St, Walnut Creek, CA 945965318
Phone: 9252954000
NPI Identifier 1598384737
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Dr. Nason Azizi , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1220 Rossmoor Parkway, Walnut Creek, CA 94595
Phone: 9259473312
NPI Identifier 1538594973
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Dr. Mariel Bailey , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1425 S Main St, Walnut Creek, CA 945965318
Phone: 9252954000
NPI Identifier 1710415435
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Dr. Anusha Bakshi , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1220 Rossmoor Pkwy, Walnut Creek, CA 945952501
Phone: 9259473312
NPI Identifier 1346778909
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Dr. Christian A. Balzer , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1220 Rossmoor Pkwy, Walnut Creek, CA 945952501
Phone: 9259473393
NPI Identifier 1518104892
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Dr. Chanda Banwat , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1450 Treat Blvd, Suite 220a, Walnut Creek, CA 945972168
Phone: 9252969730
NPI Identifier 1750584389
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Dr. Ali-Reza Barmaki , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1220 Rossmoor Pkwy, Walnut Creek, CA 945952501
Phone: 9259473393
NPI Identifier 1003921461
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Dr. Sangeeta Baronia , MD

Internal Medicine

Active NPI Status
1425 S Main St, Walnut Creek, CA 945965318
Phone: 9252954000
NPI Identifier 1073691176
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Dr. Devorah E Ben-Zeev , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1450 Treat Blvd, Suite 120a, Walnut Creek, CA 945972168
Phone: 9252969720
NPI Identifier 1033160692
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Dr. Anthony T Bernens , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2637 Shadelands Dr, Walnut Creek, CA 945982512
Phone: 9259525545
NPI Identifier 1215983440
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Dr. Sheila Mankani Bhatia , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1425 S Main St, Walnut Creek, CA 945965318
Phone: 9252954070
NPI Identifier 1225135379
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Dr. Himanshu Bhuria , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1220 Rossmoor Pkwy, Walnut Creek, CA 94595
Phone: 9259473393
NPI Identifier 1346309309
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Dr. Shagun Bindlish , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
2337 Oak Grove Rd, Walnut Creek, CA 945983506
Phone: 9252302386
NPI Identifier 1487885067
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Frequently Asked Questions about Internal Medicine in Walnut Creek

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.