James Florencio Tamesis, MD

Medicare activity in 2024

Official CMS public-use data for James Florencio Tamesis, 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)222 services
2. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)107 services
3. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)77 services
4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)69 services
5. Influenza vaccine, inactivated (90653)20 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 cholesterol61%
• High blood pressure59%
• Arthritis53%
• Chronic kidney disease26%
• Diabetes25%
• Anxiety23%

Hospitals where James Florencio Tamesis works

Medicare's Facility Affiliation Data lists James Florencio Tamesis 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.

• Sutter Auburn Faith HospitalAuburn, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050498
• Sutter Medical Center, SacramentoSacramento, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050108
• Sutter Roseville Medical CenterRoseville, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050309

Practice locations

Addresses where James Florencio Tamesis is enrolled with Medicare (CMS data updated October 2, 2026).

• 2050 Blue Oaks BlvdRoseville, CA 95747 (916) 910‑2301

Group practices

Medicare enrollment lists James Florencio Tamesis as a member of this group (CMS data updated October 2, 2026).

• Sutter Valley Medical Foundation2,500 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Roseville

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

• Gurjaspreet K. Bhattal, MD
• Vijay K. Row, MD
• Pamela E. Mercado, DO
• Sara B. Juarez, MD
• Jarae J. Ng, DO
• Tam M. Nguyen, DO
• Shirin Trisha, MD
• Stephanie Campbell, DO

All internal medicine doctors in Roseville →

Other clinicians in Sutter Valley Medical Foundation

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

• Julie A. Lee, DO
• Ming Zhou, MD
• Katherine Au, DO
• Gary K. Hamm, PA
• Maria House, MD
• Calvin Y. Wang, 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