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Diagnostic Radiology

Sonja I. Dardenelle, MD

Works at hospitals in Jackson, CA · Davis, CA · Sacramento, CA … · California

Summary

Dr. Sonja I. Dardenelle, MD is a radiologist at 1 Medical Plaza Dr, Roseville, CA 95661. Phone: (916) 454-6868. Accepts Medicare assignment. In 2024, Sonja I. Dardenelle had 1,121 Original Medicare patients and 3,350 services. NPI 1073755898. 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.

From official Medicare data

This page shows what Medicare's official clinician data says about Sonja I. Dardenelle, 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 Sonja I. Dardenelle accept Medicare assignment?
Yes. Medicare's clinician data says Sonja I. Dardenelle 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 Sonja I. Dardenelle see?
In 2024, CMS data shows 1,121 Original Medicare patients and 3,350 services for Sonja I. Dardenelle. This counts Original Medicare only and measures volume, not quality.
What is Sonja I. Dardenelle's NPI number?
1073755898. 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 Sonja I. Dardenelle, 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 patients1,121
Services billed to Medicare3,350
Different services or procedures41
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Injection, gadobutrol, 0.1 ml (A9585)1,091 services
  2. Screening 3d breast mammography (77063)934 services
  3. Screening mammography (77067)934 services
  4. Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066) (G0279)91 services
  5. Limited ultrasound scan of 1 breast (76642)89 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 cholesterol68%
  • High blood pressure60%
  • Arthritis45%
  • Osteoporosis25%
  • Diabetes22%
  • Anxiety19%

Hospitals where Sonja I. Dardenelle works

Medicare's Facility Affiliation Data lists Sonja I. Dardenelle 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 Sonja I. Dardenelle is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 17; the Medicare profile lists all.

Group practices

Medicare enrollment lists Sonja I. Dardenelle as a member of this group (CMS data updated October 2, 2026).

  • Sutter Valley Medical Foundation2,500 clinicians in the group

Specialties

Find other Diagnostic Radiology doctors in California →

Other radiologists in Roseville

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

All radiologists in Roseville →

Other clinicians in Sutter Valley Medical Foundation

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

Clinician information

CredentialMD
Medical schoolUniversity Of Miami, Lm Miller School Of Medicine
Graduation year2009 (17 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1073755898
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