Quick answers
- Does Mariam N. Nassif accept Medicare assignment?
- Yes. Medicare's clinician data says Mariam N. Nassif 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 Mariam N. Nassif see?
- In 2024, CMS data shows 875 Original Medicare patients and 1,521 services for Mariam N. Nassif. This counts Original Medicare only and measures volume, not quality.
- What is Mariam N. Nassif's NPI number?
- 1326043209. 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 Mariam N. Nassif, 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 | 875 |
|---|---|
| Services billed to Medicare | 1,521 |
| Different services or procedures | 43 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)465 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)315 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)101 services
- Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)94 services
- Nuclear medicine studies of blood flow in heart muscle at rest and with stress with concurrent ct scan (78431)83 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%
- Ischemic heart disease51%
- Arthritis49%
- Atrial fibrillation44%
- Chronic kidney disease41%
Hospitals where Mariam N. Nassif works
Medicare's Facility Affiliation Data lists Mariam N. Nassif 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.
- Intermountain Health Layton HospitalLayton, UT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 460061
- Intermountain Health Logan Regional HospitalLogan, UT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 460015
- Intermountain Health McKay-Dee HospitalOgden, UT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 460004
Practice locations
Addresses where Mariam N. Nassif is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 21; the Medicare profile lists all.
- 1380 E Medical Ctr DrSt George, UT 84790
- 1915 W 5950Roy, UT 84067 (801) 387‑8100
- 201 W Layton PkwyLayton, UT 84041
- 2075 N 1200Layton, UT 84041 (801) 779‑6200
- 2075 N 1200, Fl 2Layton, UT 84041 (801) 776‑4444
Group practices
Medicare enrollment lists Mariam N. Nassif as a member of this group (CMS data updated October 2, 2026).
- Ihc Health Services Inc3,960 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Utah →
Other cardiologists in St George
Clinicians with the same Medicare primary specialty in St George, UT — not a recommendation.
Other clinicians in Ihc Health Services Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1326043209 |
| 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