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Nephrology

Jeffrey R. Stewart, MD

Works at hospitals in Sacramento, CA · California

Summary

Dr. Jeffrey R. Stewart, MD is a nephrologist at 1600 Eureka Rd, Roseville, CA 95661. Phone: (916) 784-4000. Accepts Medicare assignment. In 2024, Jeffrey R. Stewart had 29 Original Medicare patients and 68 services. NPI 1205988003. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Nephrologist (Medicare lists Nephrology)
  • Address: 1600 Eureka Rd, Roseville, CA 95661 · Directions (4 more locations)
  • Phone: (916) 784‑4000
  • Medicare: Accepts Medicare assignment
  • Hospital: Kaiser Foundation Hospital - Sacramento
  • Group practice: Permanente Medical Group Inc
  • Medical school: University Of California, Davis School Of Medicine · graduated 1997 (29 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Jeffrey R. Stewart, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Jeffrey R. Stewart accept Medicare assignment?
Yes. Medicare's clinician data says Jeffrey R. Stewart accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Jeffrey R. Stewart see?
In 2024, CMS data shows 29 Original Medicare patients and 68 services for Jeffrey R. Stewart. This counts Original Medicare only and measures volume, not quality.
What is Jeffrey R. Stewart's NPI number?
1205988003. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Jeffrey R. Stewart, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients29
Services billed to Medicare68
Different services or procedures14
Participating Medicare providerYes
Average age of these patients64

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)22 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • Chronic kidney disease75%
  • High cholesterol66%
  • Diabetes62%
  • Heart failure55%
  • Ischemic heart disease38%

Hospitals where Jeffrey R. Stewart works

Medicare's Facility Affiliation Data lists Jeffrey R. Stewart at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Jeffrey R. Stewart is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Jeffrey R. Stewart as a member of this group (CMS data updated October 2, 2026).

  • Permanente Medical Group Inc10,996 clinicians in the group

Specialties

Find other Nephrology doctors in California →

Other nephrologists in Roseville

Clinicians with the same Medicare primary specialty in Roseville, CA — not a recommendation.

All nephrologists in Roseville →

Other clinicians in Permanente Medical Group Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolUniversity Of California, Davis School Of Medicine
Graduation year1997 (29 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1205988003
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians