Quick answers
- Does Niveen K. Abdelmessih accept Medicare assignment?
- Yes. Medicare's clinician data says Niveen K. Abdelmessih 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 Niveen K. Abdelmessih see?
- In 2024, CMS data shows 157 Original Medicare patients and 1,778 services for Niveen K. Abdelmessih. This counts Original Medicare only and measures volume, not quality.
- What is Niveen K. Abdelmessih's NPI number?
- 1922071059. 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 Niveen K. Abdelmessih, 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 | 157 |
|---|---|
| Services billed to Medicare | 1,778 |
| Different services or procedures | 42 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)595 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)288 services
- Critical care, first 30-74 minutes (99291)164 services
- Injection of drug or substance under skin or into muscle (96372)135 services
- Test to measure oxygen level in blood using ear or finger device continuously overnight (94762)103 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 cholesterol75%
- High blood pressure73%
- Arthritis55%
- Diabetes34%
- Anxiety31%
- Chronic kidney disease29%
Hospitals where Niveen K. Abdelmessih works
Medicare's Facility Affiliation Data lists Niveen K. Abdelmessih 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.
- Glendale Adventist Medical CenterGlendale, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050239
- Providence Saint Joseph Medical CenterBurbank, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050235
- USC Verdugo Hills HospitalGlendale, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050124
Practice locations
Addresses where Niveen K. Abdelmessih is enrolled with Medicare (CMS data updated October 2, 2026).
- 1808 Verdugo Blvd, Suite 316Glendale, CA 91208 (818) 790‑3045
Specialties
- Family Practiceprimary
Other family doctors in Glendale
Clinicians with the same Medicare primary specialty in Glendale, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1922071059 |
| 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