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NEPHROLOGY ASSOCIATES
NPI 1063462950
Specialist in Santa Rosa, CA

Active since May 11, 2006CLIA 05D1035052 · Waiver
2301 CIRCADIAN WAY, SUITE A, SANTA ROSA, CA 95407(707) 526-2027(707) 526-2096 Get Directions Write a Review

NPPES record last updated: May 19, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: May 19, 2026, Sep 6, 2023 (2 updates tracked since 2023).

About Nephrology Associates NPPES

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

NEPHROLOGY ASSOCIATES (NPI 1063462950) is a healthcare organization registered as a specialist in Santa Rosa, California and active in the NPI registry since May 2006. The organization holds a CLIA Waiver certificate valid through December 19, 2026 and lists Letty Ramirez, Office Manager/administrator, as its authorized official.

NPPES Registry Identity

NPI1063462950
Entity TypeOrganization
Primary Taxonomy174400000X
Legal Business NameNEPHROLOGY ASSOCIATES
Location Address2301 CIRCADIAN WAY, SUITE ASanta Rosa, CA 95407-5416
Mailing Address2301 Circadian Way, Suite ASanta Rosa, CA 95407-5416 · (707) 526-2027 · Fax (707) 526-2096
Phone(707) 526-2027
Fax(707) 526-2096
Organization SubpartNo
Authorized OfficialLetty RamirezOffice Manager/administrator · (707) 526-2027
Enumeration DateMay 11, 2006
Last NPPES UpdateMay 19, 20262 updates tracked since enumeration
NPPES CertifiedMay 19, 2026
✔ NPI 1063462950 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
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.

2301 CIRCADIAN WAY, Santa Rosa, CA 95407
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Other Identifiers 1

MedicaidGR0058950CA

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

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 05D1035052

Nephrology Associates Medical Office · Santa Rosa, CA
Active · expires Dec 19, 2026
CLIA Number05D1035052
Laboratory TypePhysician Office
Certificate Effective DateDecember 20, 2024
Certificate Expiration DateDecember 19, 2026
Laboratory DirectorBenjamin A. Fritz MD
Laboratory Phone(707) 526-2027
Laboratory LocationNephrology Associates Medical Office2301 Circadian Way Suite A, Santa Rosa, CA 95407
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DESMOND SHAPIRO M.D.
Specialist
2301 CIRCADIAN WAY, SUITE A
SANTA ROSA, CA 95407
Sonoma County (707) 526-2027
JAMES ROBERTSON M.D.
Specialist
2301 CIRCADIAN WAY, SUITE A
SANTA ROSA, CA 95407
Sonoma County (707) 526-2027
GOPA GREEN M.D.
Specialist
2301 CIRCADIAN WAY, SUITE A
SANTA ROSA, CA 95407
Sonoma County (707) 526-2027
BENJAMIN FRITZ M.D.
Internal Medicine (Nephrology)
2301 CIRCADIAN WAY, SUITE A
SANTA ROSA, CA 95407
Sonoma County (707) 526-2027
SATELLITE HEALTHCARE INC
Clinic/Center (End-Stage Renal Disease (ESRD) Treatment)
2301 CIRCADIAN WAY, SUITE C
SANTA ROSA, CA 95407
Sonoma County (707) 526-0717
WELLBOUND OF SANTA ROSA LLC
Clinic/Center (End-Stage Renal Disease (ESRD) Treatment)
2301 CIRCADIAN WAY, SUITE B
SANTA ROSA, CA 95407
Sonoma County (707) 541-3410
KATHLEEN M DUTTON FNP
Registered Nurse
2301 CIRCADIAN WAY, SUITE A
SANTA ROSA, CA 95407
Sonoma County (707) 526-2027
ERIC L CHEUNG M.D.
Internal Medicine (Nephrology)
2301 CIRCADIAN WAY, SUITE A
SANTA ROSA, CA 95407
Sonoma County (707) 526-2027

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 Nephrology Associates's NPI number?

The NPI number for Nephrology Associates is 1063462950. It was assigned to this organization in the NPPES registry on May 11, 2006.

Where is Nephrology Associates located?

Nephrology Associates is located at 2301 Circadian Way Suite A, Santa Rosa, CA 95407. The listed phone number is (707) 526-2027.

What is Nephrology Associates's specialty?

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

Does Nephrology Associates hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D1035052) is associated with this NPI, valid through December 19, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Nephrology Associates was last updated on May 19, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.