Quick answers
- Which hospitals does Jaan Hasan work at?
- Medicare's official clinician data lists Jaan Hasan at 3 hospitals: Adventist Health Castle, Alta Bates Summit Medical Center and Alta Bates Summit Medical Center - Alta Bates Camp…. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jaan Hasan see patients?
- Medicare's clinician data lists 4 practice locations, including Berkeley, CA, Oakland, CA and Kahuku, HI. Call before your visit to confirm the address.
- What is Jaan Hasan's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Jaan Hasan accept Medicare assignment?
- Yes. Medicare's clinician data says Jaan Hasan 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.
- What is the phone number for Jaan Hasan?
- (510) 204-4444, as listed in official Medicare / NPI Registry data.
- What is Jaan Hasan's NPI number?
- 1144883075. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jaan Hasan works
Medicare's Facility Affiliation Data lists Jaan Hasan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health CastleKailua, HI · Acute Care Hospital · CCN 120006
- Alta Bates Summit Medical CenterOakland, CA · Acute Care Hospital · CCN 050043
- Alta Bates Summit Medical Center - Alta Bates Camp…Berkeley, CA · Acute Care Hospital · CCN 050305
Practice locations
Addresses where Jaan Hasan is enrolled with Medicare (CMS data updated 2026-10-02).
- 2450 Ashby AveBerkeley, CA 94705 (510) 204‑4444
- 350 Hawthorne AveOakland, CA 94609 (510) 655‑4000
- 56 -117 Pualalea StKahuku, HI 96731 (808) 293‑9221
- 640 Ulukahiki StKailua, HI 96734 (808) 263‑5164
Group practices
Medicare enrollment lists Jaan Hasan as a member of these groups (CMS data updated 2026-10-02).
- Hawaii Emergency Physicians Associated Inc120 clinicians in the group
- Berkeley Emergency Medical Group Inc41 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Berkeley
Clinicians with the same Medicare primary specialty in Berkeley, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1144883075 |
| 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