Quick answers
- Does Zaid M. Haddadin accept Medicare assignment?
- Yes. Medicare's clinician data says Zaid M. Haddadin 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 Zaid M. Haddadin see?
- In 2024, CMS data shows 3,282 Original Medicare patients and 11,859 services for Zaid M. Haddadin. This counts Original Medicare only and measures volume, not quality.
- What is Zaid M. Haddadin's NPI number?
- 1699203489. 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 Zaid M. Haddadin, 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 | 3,282 |
|---|---|
| Services billed to Medicare | 11,859 |
| Different services or procedures | 204 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)3,651 services
- Injection, gadobutrol, 0.1 ml (A9585)2,950 services
- X-ray of chest, 1 view (71045)585 services
- Screening 3d breast mammography (77063)356 services
- Screening mammography (77067)356 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 pressure74%
- High cholesterol74%
- Arthritis58%
- Anxiety29%
- Diabetes27%
- Depression27%
Hospitals where Zaid M. Haddadin works
Medicare's Facility Affiliation Data lists Zaid M. Haddadin 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.
- Adventist Health Sierra VistaSan Luis Obispo, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050506
- Adventist Health Twin CitiesTempleton, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050633
- French Hospital Medical CenterSan Luis Obispo, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050232
- Marian Regional Medical CenterSanta Maria, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050107
- Providence St. Jude Medical CenterFullerton, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050168
Practice locations
Addresses where Zaid M. Haddadin is enrolled with Medicare (CMS data updated October 2, 2026).
- 101 E Valencia Mesa DrFullerton, CA 92835
- 1154 E Grand AveArroyo Grande, CA 93420 (805) 395‑3277
- 2141 N Harbor Blvd, Suite 16000Fullerton, CA 92835
- 262 Posada LnTempleton, CA 93465 (805) 434‑1491
- 77 Casa St, Suite 102San Luis Obispo, CA 93405 (805) 546‑7733
Group practices
Medicare enrollment lists Zaid M. Haddadin as a member of these groups (CMS data updated October 2, 2026).
- Adventist Health Physicians Network628 clinicians in the group
- St Jude Radiology Medical Group Inc61 clinicians in the group
- Radiology Associates of San Luis Obispo a Medical Group Inc59 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Fullerton
Clinicians with the same Medicare primary specialty in Fullerton, CA — not a recommendation.
Other clinicians in Adventist Health Physicians Network
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Utah School Of Medicine |
| Graduation year | 2017 (9 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699203489 |
| 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