Quick answers
- Does Mario Ammirati accept Medicare assignment?
- Yes. Medicare's clinician data says Mario Ammirati 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.
- What is Mario Ammirati's NPI number?
- 1730137043. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Mario Ammirati is enrolled with Medicare (CMS data updated October 2, 2026).
- 11199 Sorrento Valley Rd, Suite 203San Diego, CA 92121 (267) 266‑6171
- 900 E Broadway AveBismarck, ND 58501 (701) 530‑7000
Group practices
Medicare enrollment lists Mario Ammirati as a member of this group (CMS data updated October 2, 2026).
- St Alexius Medical Center238 clinicians in the group
Specialties
- Neurosurgeryprimary
Other neurosurgeons in San Diego
Clinicians with the same Medicare primary specialty in San Diego, CA — not a recommendation.
Other clinicians in St Alexius Medical Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1730137043 |
| 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
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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