Quick answers
- Which hospitals does Ali Hassani work at?
- Medicare's official clinician data lists Ali Hassani at 1 hospital: NorthBay Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ali Hassani see patients?
- Medicare's clinician data lists 2 practice locations, including Fairfield, CA and Vacaville, CA. Call before your visit to confirm the address.
- What is Ali Hassani's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Ali Hassani accept Medicare assignment?
- Yes. Medicare's clinician data says Ali Hassani accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Ali Hassani offer telehealth?
- Medicare's clinician data says Ali Hassani offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Ali Hassani?
- (707) 646-5500, as listed in official Medicare / NPI Registry data.
- What is Ali Hassani's NPI number?
- 1487818373. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ali Hassani works
Medicare's Facility Affiliation Data lists Ali Hassani at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- NorthBay Medical CenterFairfield, CA · Acute Care Hospital · CCN 050367
Practice locations
Addresses where Ali Hassani is enrolled with Medicare (CMS data updated 2026-10-02).
- 2470 Hilborn Rd, Suite 100and200Fairfield, CA 94534 (707) 646‑5500
- 421 Nut Tree RdVacaville, CA 95687 (707) 624‑7500
Group practices
Medicare enrollment lists Ali Hassani as a member of these groups (CMS data updated 2026-10-02).
- NorthBay Physicians Surgery Center, LLC324 clinicians in the group
- NorthBay Health Medical Foundation213 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Fairfield
Clinicians with the same Medicare primary specialty in Fairfield, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1487818373 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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