Quick answers
- Does Ziyad K. Haddad accept Medicare assignment?
- Yes. Medicare's clinician data says Ziyad K. Haddad 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 Ziyad K. Haddad see?
- In 2024, CMS data shows 2,062 Original Medicare patients and 17,726 services for Ziyad K. Haddad. This counts Original Medicare only and measures volume, not quality.
- What is Ziyad K. Haddad's NPI number?
- 1356329965. 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 Ziyad K. Haddad, 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 | 2,062 |
|---|---|
| Services billed to Medicare | 17,726 |
| Different services or procedures | 154 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, gadoterate meglumine, 0.1 ml (A9575)9,060 services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)5,200 services
- X-ray of chest, 1 view (71045)455 services
- Ct scan head or brain without contrast (70450)215 services
- Mri scan of leg joint without contrast (73721)177 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%
- Arthritis66%
- Ischemic heart disease32%
- Anxiety31%
- Diabetes29%
Hospitals where Ziyad K. Haddad works
Medicare's Facility Affiliation Data lists Ziyad K. Haddad 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.
- Lewisgale Hospital AlleghanyLow Moor, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490126
- Lewisgale Hospital MontgomeryBlacksburg, VA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 490110
- Lewisgale Medical CenterSalem, VA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 490048
- Reston Hospital CenterReston, VA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 490107
- Stonesprings Hospital CenterDulles, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490145
Practice locations
Addresses where Ziyad K. Haddad is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 1800 Town Ctr Dr, Suite 115Reston, VA 20190 (703) 478‑0922
- 1850 Town Ctr PkwyReston, VA 20190 (703) 478‑0922
- 19500 Sandridge Way, Suite 420Lansdowne, VA 20176 (703) 737‑6010
- 20905 Professional Plz, Suite 100Ashburn, VA 20147 (571) 223‑0230
- 24440 Stone Springs BlvdSterling, VA 20166 (703) 726‑1201
Group practices
Medicare enrollment lists Ziyad K. Haddad as a member of these groups (CMS data updated October 2, 2026).
- Loudoun Medical Group, PC271 clinicians in the group
- Reston Radiology Consultants, PC37 clinicians in the group
- Roanoke Imaging LLC19 clinicians in the group
- Fair Oaks Imaging Center PC18 clinicians in the group
- Mri of Reston, LP17 clinicians in the group
- Loudoun Imaging Center/Ashburn LLC16 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Reston
Clinicians with the same Medicare primary specialty in Reston, VA — not a recommendation.
Other clinicians in Loudoun Medical Group, PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 1997 (29 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1356329965 |
| 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