Sean R. Miller, MD

Medicare activity in 2024

Official CMS public-use data for Sean R. Miller, 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.

Most frequent services

1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)28 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 pressure46%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)43%

Hospitals where Sean R. Miller works

Medicare's Facility Affiliation Data lists Sean R. Miller 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.

• Kaiser Foundation Hospital Fontana/OntarioFontana, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050140

Practice locations

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

• 9961 Sierra AveFontana, CA 92335 (909) 427‑5000

Group practices

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

• Southern California Permanente Medical Group11,293 clinicians in the group

Specialties

• Internal Medicineprimary
• Hematologyalso

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Fontana

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

• Becky Nguyen, DO
• Ali Jabari, MD
• Ajay Ohri, MD
• Uma P. Rao, MD
• Richie Rana, MD
• Seraphine Leunkam, MD
• Ruoying Feng, MD
• Ambreen Hasan, MD

All internal medicine doctors in Fontana →

Other clinicians in Southern California Permanente Medical Group

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

• Sonia Badreshia, MD
• Eve Allerton, PA
• Mingfei Luo, MD
• Sue Y. Kim, MD
• Mihaela C. Chelu, MD
• Glena Cheng, MD

Clinician information

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