EAST BAY RHEUMATOLOGY MEDICAL GROUP, INC.
NPI 1891930673
Specialist in San Leandro, CA
About East Bay Rheumatology Medical Group, Inc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
EAST BAY RHEUMATOLOGY MEDICAL GROUP, INC. (NPI 1891930673) is a healthcare organization registered as a specialist in San Leandro, California and active in the NPI registry since December 2008. The organization holds a CLIA Waiver certificate valid through October 24, 2027 and lists Clark Michael Neuwelt, Doctor, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
East Bay Rheumatology Medical Group, Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
4Medicare enrollment records show 4 clinicians reassign Medicare billing to East Bay Rheumatology Medical Group, Inc., which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.
Clinicians, nearest first (4)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 05D1047069
East Bay Rheumatology Medical Group, Inc · San Leandro, CAFrequently 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 East Bay Rheumatology Medical Group, Inc.'s NPI number?
The NPI number for East Bay Rheumatology Medical Group, Inc. is 1891930673. It was assigned to this organization in the NPPES registry on December 9, 2008.
Where is East Bay Rheumatology Medical Group, Inc. located?
East Bay Rheumatology Medical Group, Inc. is located at 13851 E 14th St Ste 301, San Leandro, CA 94578. The listed phone number is (510) 357-1303.
What is East Bay Rheumatology Medical Group, Inc.'s specialty?
The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.
Is East Bay Rheumatology Medical Group, Inc. enrolled in Medicare?
Yes. East Bay Rheumatology Medical Group, Inc. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through East Bay Rheumatology Medical Group, Inc.?
According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians in 2 Medicare specialties reassign their Medicare billing to East Bay Rheumatology Medical Group, 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. The largest specialties are Rheumatology (3) and Nurse Practitioner (1). Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does East Bay Rheumatology Medical Group, Inc. hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 05D1047069) is associated with this NPI, valid through October 24, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
What insurance does East Bay Rheumatology Medical Group, Inc. accept?
Health plans from Alliant Health Plans, Inc., Ambetter Health, Ambetter Health of Delaware, Ambetter from Absolute Total Care and Ambetter from Arkansas Health & Wellness and 28 other insurers list East Bay Rheumatology Medical Group, Inc. as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for East Bay Rheumatology Medical Group, Inc. was last updated on February 12, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years 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.
# East Bay Rheumatology Medical Group, Inc. · NPI 1891930673
Specialist organization in San Leandro, California. Organization record, active in the CMS NPPES registry since December 9, 2008.
## Identity
- **NPI:** 1891930673 (Entity type: Organization)
- **Enumerated:** December 9, 2008
- **Primary specialty:** Specialist · taxonomy 174400000X
- **Organization subpart:** No
- **Authorized official:** Clark Neuwelt, DOCTOR
## Practice location
- **Address:** 13851 E 14TH ST STE 301, San Leandro, CA 94578-2630
- **Phone:** (510) 357-1303 · **Fax:** (510) 357-5463
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 4 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Rheumatology (3), Nurse Practitioner (1); 2 practice at this address · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 12, 2014
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1891930673) · Data from the CMS NPPES public registry.