NPIMap

Organization Active NPI

Nephrology Associates

  • Specialist
  • Santa Rosa, CA
National Provider Identifier
1063462950
Registry record updated May 19, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
SpecialistTaxonomy code 174400000X
Legal business name
NEPHROLOGY ASSOCIATES
Practice address
2301 Circadian Way
Suite a
Santa Rosa, CA 95407-5416
Phone
(707) 526-2027
Fax
(707) 526-2096
NPI assigned
May 11, 2006
Last updated
May 19, 2026By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on May 19, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

Name
Letty Ramirez
Title
Office Manager/Administrator
Phone
(707) 526-2027

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Specialist 174400000X NU Primary

Addresses

Primary practice location

2301 Circadian Way
Suite a
Santa Rosa, CA 95407-5416

Mailing address

2301 Circadian Way
Suite a
Santa Rosa, CA 95407-5416
Phone (707) 526-2027

Other identifiers 1

IdentifierTypeStateIssuer
GR0058950MedicaidCA

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20041210000586 CA Part B Supplier - Clinic/Group Practice 0547227621 Receives reassigned benefits from 12 practitioners
Practice locations: Santa Rosa, CA; Ukiah, CA

Laboratory certificates & supplier records

Derived by NPIMap

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

CLIA numberLaboratoryCertificateExpires
05D1035052Nephrology Associates Medical Office2301 Circadian Way Suite a, Santa Rosa, CA 95407Certificate of waiverDec 19, 2026

National Provider Directory

National Provider Directory

Member organizations 1

Organizations listed as members of this organization in the National Provider Directory.

Locations

1265 N Dutton Ave
#3
Santa Rosa, CA 95401
Phone (707) 526-2027

2301 Circadian Way
Ste A
Santa Rosa, CA 95407
Phone (707) 526-2027

Interoperability endpoints

  • FHIR API: https://fhir4.healow.com/fhir/r4/BGAJAA

Practitioners & affiliated clinicians

Practitioners 15

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

View all 15

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1147305600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1779148800000",
    "number": "1063462950",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2301 CIRCADIAN WAY",
            "address_2": "SUITE A",
            "city": "SANTA ROSA",
            "state": "CA",
            "postal_code": "954075416",
            "telephone_number": "707-526-2027",
            "fax_number": "707-526-2096"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2301 CIRCADIAN WAY",
            "address_2": "SUITE A",
            "city": "SANTA ROSA",
            "state": "CA",
            "postal_code": "954075416",
            "telephone_number": "707-526-2027",
            "fax_number": "707-526-2096"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "NEPHROLOGY ASSOCIATES",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-05-11",
        "last_updated": "2026-05-19",
        "certification_date": "2026-05-19",
        "status": "A",
        "authorized_official_last_name": "RAMIREZ",
        "authorized_official_first_name": "LETTY",
        "authorized_official_title_or_position": "OFFICE MANAGER/ADMINISTRATOR",
        "authorized_official_telephone_number": "707-526-2027"
    },
    "taxonomies": [
        {
            "code": "174400000X",
            "taxonomy_group": "",
            "desc": "Specialist",
            "state": "NU",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "GR0058950",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Santa Rosa, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 19, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.