Mazen M. Hashisho, MD

Medicare activity in 2024

Official CMS public-use data for Mazen M. Hashisho, 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)638 services
2. Use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes (99153)480 services
3. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)167 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)163 services
5. Ultrasonic guidance for blood vessel access (76937)162 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%
• Diabetes62%
• Chronic kidney disease43%
• Arthritis42%
• Ischemic heart disease29%

Hospitals where Mazen M. Hashisho works

Medicare's Facility Affiliation Data lists Mazen M. Hashisho 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.

• Dominican HospitalSanta Cruz, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050242
• Natividad Medical CenterSalinas, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050248

Practice locations

Addresses where Mazen M. Hashisho is enrolled with Medicare (CMS data updated October 2, 2026).

• 242 E Romie LnSalinas, CA 93901 (831) 318‑0010
• 3275 Aptos Rancho Rd, Suite 1aAptos, CA 95003 (831) 318‑0010

Group practices

Medicare enrollment lists Mazen M. Hashisho as a member of this group (CMS data updated October 2, 2026).

• Monterey Bay Vascular Inc3 clinicians in the group

Specialties

• Vascular Surgeryprimary
• General Surgeryalso
• Thoracic Surgeryalso

Find other Vascular Surgery doctors in California →

Other vascular surgeons in California

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

• Rhoda Leichter, MD
• Michael J. Sise, MD
• Phong T. Dargon, MD
• Katherine E. Hekman, MD
• Camille Jackson, MD
• Richard A. Guest, MD
• Tae K. Song, MD
• Connor M. Caples, MD

All vascular surgeons in California →

Other clinicians in Monterey Bay Vascular Inc

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

• Ezell Askew Jr., MD
• Leonard Caputo, 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