Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Renal Treatment Centers California Inc

End-Stage Renal Disease (ESRD) Treatment Clinic/Center in Clearlake, CA · enumerated 2007 · authorized official John Winstel, Chief Accounting Officer.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1275661506

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Registry record

Entity type Organization (Type 2)

Legal business name Renal Treatment Centers California Inc

Other name <Unavail>

Practice address 14400 Olympic Dr, Clearlake, CA, 95422

Phone (707) 994-9785

Fax (707) 994-9790

Enumeration date Feb 28, 2007

Last updated in NPPES Oct 3, 2022

Taxonomy & classification

261QE0700X End-Stage Renal Disease (ESRD) Treatment Clinic/Center Ambulatory Health Care Facilities · License 550000609 (CA) Primary

Authorized official

Name John Winstel

Title Chief Accounting Officer

Phone (253) 733-4501

Other identifiers

Identifier	Type	State	Issuer
1275661506	Medicaid	CA	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where is Renal Treatment Centers California Inc located?

The practice location on file with NPPES is in Clearlake, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2022-10-03. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-10-03.