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TRAILSTONE DIALYSIS LLC
NPI 1437538618
Clinic/Center - End-Stage Renal Disease (ESRD) Treatment in Ontario, CA

Active since May 21, 2015
2/5
Overall Rating
2403 S VINEYARD AVE, STE D, ONTARIO, CA 91761(909) 923-3850(909) 923-8568 Get Directions Write a Review

NPPES record last updated: September 4, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Sep 4, 2025, Sep 7, 2023, Apr 18, 2022 and 4 more (7 updates tracked since 2019).

About Trailstone Dialysis Llc NPPES

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

TRAILSTONE DIALYSIS LLC (NPI 1437538618), doing business as Ontario Mills Dialysis, is a healthcare organization registered as an end-stage renal disease (esrd) treatment in Ontario, California and active in the NPI registry since May 2015. The organization lists Sam T Wey, Vp Licensure&certification, as its authorized official.

NPPES Registry Identity

NPI1437538618
Entity TypeOrganization
Primary Taxonomy261QE0700X
Legal Business NameTRAILSTONE DIALYSIS LLC
Location Address2403 S VINEYARD AVE, STE DOntario, CA 91761-6471
Mailing Address5200 Virginia Way, L&c DeptBrentwood, TN 37027-7569
Phone(909) 923-3850
Fax(909) 923-8568
Organization SubpartNo
Authorized OfficialSam T WeyVp Licensure&certification · (615) 341-6691
Enumeration DateMay 21, 2015
Last NPPES UpdateSeptember 4, 20257 updates tracked since enumeration
NPPES CertifiedSeptember 4, 2025
✔ NPI 1437538618 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · End-Stage Renal Disease (ESRD) TreatmentAmbulatory Health Care Facilities
Taxonomy Code261QE0700X
2403 S VINEYARD AVE, Ontario, CA 91761
Open in Google Maps ↗

Other Names 1

Doing Business AsOntario Mills Dialysis

Other Identifiers 1

Medicaid1437538618CA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Superior HealthPlan, Ambetter Health and more.Insurance ›

Dialysis Facility Quality Ratings CMS Care Compare

Quality ratings, services and patient survey results for DaVita Ontario Mills Dialysis (CMS certification number 552815), from CMS Care Compare.

DaVita Ontario Mills Dialysis

Dialysis facility · Ontario, CA
2/5 CMS RatingRating period January 2020 to December 2023
OwnershipProfit
ChainDaVita
CMS Certification Number552815
ESRD NetworkNetwork 18
Hemodialysis Stations25
Medicare-Certified SinceAugust 22, 2017
Location2403 S Vineyard Ave Suite DOntario, CA 91761 · San Bernardino County
Phone(909) 923-3850
Services Offered
In-center hemodialysis

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 Trailstone Dialysis LLC's NPI number?

The NPI number for Trailstone Dialysis LLC is 1437538618. It was assigned to this organization in the NPPES registry on May 21, 2015. The provider is doing business as Ontario Mills Dialysis.

Where is Trailstone Dialysis LLC located?

Trailstone Dialysis LLC is located at 2403 S Vineyard Ave Ste D, Ontario, CA 91761. The listed phone number is (909) 923-3850.

What is Trailstone Dialysis LLC's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in End-Stage Renal Disease (ESRD) Treatment, with taxonomy code 261QE0700X.

Is Trailstone Dialysis LLC a Medicare-certified dialysis facility?

Yes. DaVita Ontario Mills Dialysis is a Medicare-certified dialysis facility, certified since August 22, 2017.

What quality rating does Trailstone Dialysis LLC have?

CMS rates DaVita Ontario Mills Dialysis 2 out of 5 stars on Care Compare. The full measure detail is in the Dialysis Facility Quality section above.

What insurance does Trailstone Dialysis LLC accept?

Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Ambetter from Superior HealthPlan and UnitedHealthcare list Trailstone Dialysis LLC 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 Trailstone Dialysis LLC was last updated on September 4, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.