Andre Bonnett Alonso, MD

Medicare activity in 2024

Official CMS public-use data for Andre Bonnett Alonso, 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)306 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)131 services
3. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)107 services
4. 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)89 services
5. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)56 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 cholesterol75%
• High blood pressure68%
• Arthritis43%
• Ischemic heart disease27%
• Diabetes24%
• Chronic kidney disease24%

Hospitals where Andre Bonnett Alonso works

Medicare's Facility Affiliation Data lists Andre Bonnett Alonso 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.

• John Muir Medical Center - Concord CampusConcord, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050496
• John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050180

Practice locations

Addresses where Andre Bonnett Alonso is enrolled with Medicare (CMS data updated October 2, 2026).

• 1450 Treat Blvd, Suite 120aWalnut Creek, CA 94597 (925) 296‑9720

Group practices

Medicare enrollment lists Andre Bonnett Alonso as a member of this group (CMS data updated October 2, 2026).

• John Muir Physician Network494 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in California →

Other family doctors in Walnut Creek

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

• Grace S. Chou, MD
• Emily Lin, MD
• Robert Eidus, MD
• Belis Aladag, MD
• Derek J. Jue, MD
• Linda Wang, MD
• Deepu Bindal, MD
• Ariel Badger, MD

All family doctors in Walnut Creek →

Other clinicians in John Muir Physician Network

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

• Zhi Peng Dai, DO
• Grace S. Chou, MD
• Emily Lin, MD
• Uma Vedala, MD
• Frank P. Castillo Jr., NP
• Perkin Shiu, 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