Martin R. Zapata, MD

Medicare activity in 2024

Official CMS public-use data for Martin R. Zapata, 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 nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)837 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)580 services
3. Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes (99307)462 services
4. Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes (99347)329 services
5. Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes (99305)236 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 cholesterol75%
• Diabetes66%
• Arthritis56%
• Anxiety51%
• Depression50%

Hospitals where Martin R. Zapata works

Medicare's Facility Affiliation Data lists Martin R. Zapata 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.

• Coast Plaza HospitalNorwalk, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050771
• Community Hospital of Huntington ParkHuntington Park, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050091
• East Los Angeles Doctors HospitalLos Angeles, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050641
• Los Angeles Community HospitalLos Angeles, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050663
• PIH Health Downey HospitalDowney, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050393

Practice locations

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

• 5646 Marlatt StJurupa Valley, CA 91752 (951) 204‑7196

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in California →

Other internal medicine doctors in California

Clinicians with the same Medicare primary specialty in California — not a recommendation.

• Armyn Anne A. Carbonell, MD
• Armando F. Siqueiros, MD
• Rafia Parveen, MD
• Sohun S. Awsare, MD
• Pedram J. Kohan, MD
• Lucas G. Hill, MD
• Peter C. Lang, MD
• Ravi Bhatia, MD

All internal medicine doctors in California →

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