Quick answers
- Does Mazen D. Yousef accept Medicare assignment?
- Yes. Medicare's clinician data says Mazen D. Yousef accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Mazen D. Yousef see?
- In 2024, CMS data shows 320 Original Medicare patients and 398 services for Mazen D. Yousef. This counts Original Medicare only and measures volume, not quality.
- What is Mazen D. Yousef's NPI number?
- 1295213247. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Mazen D. Yousef, 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.
| Original Medicare patients | 320 |
|---|---|
| Services billed to Medicare | 398 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)213 services
- Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)85 services
- Emergency department visit with high level of medical decision making (99285)42 services
- Emergency department visit with moderate level of medical decision making (99284)22 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%
- Arthritis62%
- Anxiety55%
- Ischemic heart disease54%
- Diabetes52%
Hospitals where Mazen D. Yousef works
Medicare's Facility Affiliation Data lists Mazen D. Yousef 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.
- Clara Maass Medical CenterBelleville, NJ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 310009
- Community Medical CenterToms River, NJ · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 310041
Practice locations
Addresses where Mazen D. Yousef is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.
- 1 Clara Maass DrBelleville, NJ 07109 (973) 450‑2000
- 1 Hamilton Health PlHamilton, NJ 08690 (609) 586‑7900
- 110 Rehill AveSomerville, NJ 08876 (908) 685‑2200
- 225 Williamson StElizabeth, NJ 07202 (908) 994‑5422
- 652 Atlantic City Blvd, Suite 3Bayville, NJ 08721 (848) 333‑4509
Group practices
Medicare enrollment lists Mazen D. Yousef as a member of these groups (CMS data updated October 2, 2026).
- RWJBH Observation Associates LLC1,008 clinicians in the group
- RWJBH Emergency Medicine Associates, LLC848 clinicians in the group
- House Call NP2 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Belleville
Clinicians with the same Medicare primary specialty in Belleville, NJ — not a recommendation.
Other clinicians in RWJBH Observation Associates LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1295213247 |
| Corrections | Report an error or suggest an update → |
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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians