ARTHRITIS & RHEUMATOLOGY MEDICAL ASSOCIATES, INC
NPI 1154403483
Specialist in Walnut Creek, CA

Q: What is Arthritis & Rheumatology Medical Associates, Inc's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Active since October 19, 2006

120 LA CASA VIA, SUITE 204, WALNUT CREEK, CA 94598(925) 210-1050(925) 210-1082 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 13, 2026, Dec 27, 2021, Aug 22, 2020 (3 updates tracked since 2020).

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About Arthritis & Rheumatology Medical Associates, Inc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ARTHRITIS & RHEUMATOLOGY MEDICAL ASSOCIATES, INC (NPI 1154403483), doing business as Northern California Arthritis Center, is a healthcare organization registered as a specialist in Walnut Creek, California and active in the NPI registry since October 2006. The organization lists Rashmi B Dixit, President, as its authorized official.

NPPES Registry Identity

NPI1154403483

Entity TypeOrganization

Primary Taxonomy174400000X

Legal Business NameARTHRITIS & RHEUMATOLOGY MEDICAL ASSOCIATES, INC

Location Address120 LA CASA VIA, SUITE 204Walnut Creek, CA 94598-3067

Mailing Address120 La Casa Via Ste 204Walnut Creek, CA 94598-3007 · (925) 210-1050 · Fax (925) 210-1082

Phone(925) 210-1050

Fax(925) 210-1082

Organization SubpartNo

Authorized OfficialRashmi B DixitPresident · (925) 210-1050

Enumeration DateOctober 19, 2006

Last NPPES UpdateJuly 13, 20263 updates tracked since enumeration

NPPES CertifiedJuly 13, 2026

✔ NPI 1154403483 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

License✔ Licensed in CA · FNP25477

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

120 LA CASA VIA, Walnut Creek, CA 94598

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Other Names 2

Doing Business AsNorthern California Arthritis Center

Former Legal Business NameArthritis & Rheumatology Medical Associates, Inc

Other Identifiers 3

Other197318900CA · Eeoic

OtherZZZ56871ZCA · Blue Shield

MedicaidGR0102590CA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Arthritis & Rheumatology Medical Associates, Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 6 clinicians reassign Medicare billing to Arthritis & Rheumatology Medical Associates, Inc, which bills Medicare for the services they deliver. Of these, 4 practice at this address. They are listed nearest first.

Clinicians, nearest first (6)

Rashmi Dixit, M.D.

Rheumatology

NPI 1811990666

120 LA CASA VIA STE 204
Walnut Creek, CA 94598

(925) 210-1050

✔ PECOS✔ Accepts MedicareSame address

Zuzana Foster, M.D.

Rheumatology

NPI 1184621542

120 LA CASA VIA STE 204
Walnut Creek, CA 94598

(925) 210-1050

✔ PECOS✔ Accepts MedicareSame address

David Wu, MD

Rheumatology

NPI 1023015484

120 LA CASA VIA STE 204
Walnut Creek, CA 94598

(925) 210-1050

✔ PECOS✔ Accepts MedicareSame address

Saba Ziaee, MD

Rheumatology

NPI 1396004107

120 LA CASA VIA STE 204
Walnut Creek, CA 94598

(925) 210-1050

✔ PECOS✔ Accepts MedicareSame address

Atul Agrawal, MD

Rheumatology

NPI 1528146016

5601 DEER VALLEY RD
Antioch, CA 94531

(925) 813-6500

✔ PECOS✔ Accepts Medicare15 mi

Karun Nair, MD

Rheumatology

NPI 1710514724

1620 W HARRISON ST
Chicago, IL 60612

(312) 942-5000

✔ PECOS✔ Accepts Medicare1,835 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Arthritis & Rheumatology Medical Associates, Inc's NPI number?

The NPI number for Arthritis & Rheumatology Medical Associates, Inc is 1154403483. It was assigned to this organization in the NPPES registry on October 19, 2006. The provider is doing business as Northern California Arthritis Center.

Where is Arthritis & Rheumatology Medical Associates, Inc located?

Arthritis & Rheumatology Medical Associates, Inc is located at 120 La Casa Via Suite 204, Walnut Creek, CA 94598. The listed phone number is (925) 210-1050.

What is Arthritis & Rheumatology Medical Associates, Inc's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Arthritis & Rheumatology Medical Associates, Inc enrolled in Medicare?

Yes. Arthritis & Rheumatology Medical Associates, Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Arthritis & Rheumatology Medical Associates, Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 6 clinicians, all in Rheumatology, reassign their Medicare billing to Arthritis & Rheumatology Medical Associates, Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 4 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Arthritis & Rheumatology Medical Associates, Inc was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.