Mazen A. Mahjoub, MD

Medicare activity in 2024

Official CMS public-use data for Mazen A. Mahjoub, 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. Injection, adenosine, 1 mg (not to be used to report any adenosine phosphate compounds) (J0153)7,108 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,461 services
3. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)1,374 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)815 services
5. Technetium tc-99m sestamibi, diagnostic, per study dose (A9500)669 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%
• Arthritis57%
• Ischemic heart disease49%
• Diabetes39%
• Chronic kidney disease39%

Hospitals where Mazen A. Mahjoub works

Medicare's Facility Affiliation Data lists Mazen A. Mahjoub 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.

• HMHP St Elizabeth Boardman Health CenterBoardman, OH · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 360276
• MH St Elizabeth Youngstown HospitalYoungstown, OH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 360064
• MH St Joseph Warren HospitalWarren, OH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 360161

Practice locations

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

• 667 Eastland Ave SEWarren, OH 44484 (330) 841‑4000
• 9375 E Market St, Suite 3Warren, OH 44484 (330) 392‑0100

Specialties

• Cardiovascular Disease (Cardiology)primary

Find other Cardiovascular Disease (Cardiology) doctors in Ohio →

Other cardiologists in Warren

Clinicians with the same Medicare primary specialty in Warren, OH — not a recommendation.

• John D. Scrocco, MD
• Rene Cuadra, MD
• Urwa Barakat, MD
• David N. Fredericka, MD
• Matthew Krinock, DO
• Richard L. Weitzel, MD
• Gary A. Young, MD
• Fadi Naddour, MD

All cardiologists in Warren →

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