Frank Zazueta, MD

Medicare activity in 2024

Official CMS public-use data for Frank Zazueta, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)505 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)194 services
3. Hospital discharge day management, more than 30 minutes (99239)107 services
4. Hospital discharge day management, 30 minutes or less (99238)58 services
5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)30 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%
• High cholesterol74%
• Heart failure53%
• Anxiety49%
• Arthritis47%
• Depression45%

Hospitals where Frank Zazueta works

Medicare's Facility Affiliation Data lists Frank Zazueta 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.

• Providence St Joseph HospitalEureka, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050006

Practice locations

Addresses where Frank Zazueta is enrolled with Medicare (CMS data updated October 2, 2026).

• 200 W Ctr St PromenadeAnaheim, CA 92805
• 2700 Dolbeer StEureka, CA 95501 (707) 445‑8121
• 2710 Dolbeer StEureka, CA 95501 (707) 267‑2060
• 500 Doyle Park DrSanta Rosa, CA 95405

Group practices

Medicare enrollment lists Frank Zazueta as a member of this group (CMS data updated October 2, 2026).

• Providence Medical Foundation1,466 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in California →

Other emergency medicine doctors in Anaheim

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

• Hannah Russo, DO
• Tuan A. Nguyen, DO
• Gerald Ngo, MD
• Scott D. Lopata, MD
• Darren B. Hom, MD
• Matthew Gilbert, MD
• Richard H. Chen, MD
• Hsu-Hsiang Chang, DO

All emergency medicine doctors in Anaheim →

Other clinicians in Providence Medical Foundation

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

• Joseph E. Barrera, MD
• Catherine C. Friesch, NP
• Robert J. Allen, MD
• Margaret A. Schlatter, MD
• Deidre Vaughn, PA
• Veysel Tahan, 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