Quick answers
- Which hospitals does Mark Hanna work at?
- Medicare's official clinician data lists Mark Hanna at 2 hospitals: Casa Colina Hospital and San Antonio Regional Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Hanna see patients?
- Medicare's clinician data lists 1 practice location in Irvine, CA. Call before your visit to confirm the address.
- What is Mark Hanna's specialty?
- Medicare lists Colorectal Surgery (Proctology) as the primary specialty, and also General Surgery.
- Does Mark Hanna accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Hanna 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 Mark Hanna offer telehealth?
- Medicare's clinician data says Mark Hanna offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mark Hanna?
- (949) 671-4673, as listed in official Medicare / NPI Registry data.
- What is Mark Hanna's NPI number?
- 1902120439. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark Hanna works
Medicare's Facility Affiliation Data lists Mark Hanna at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Casa Colina HospitalPomona, CA · Acute Care Hospital · CCN 050782
- San Antonio Regional HospitalUpland, CA · Acute Care Hospital · CCN 050099
Practice locations
Addresses where Mark Hanna is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 FivepointIrvine, CA 92618 (949) 671‑4673
Group practices
Medicare enrollment lists Mark Hanna as a member of this group (CMS data updated 2026-10-02).
- City of Hope Medical Foundation982 clinicians in the group
Specialties
Find other Colorectal Surgery (Proctology) doctors in California →
Other colorectal surgeons in Irvine
Clinicians with the same Medicare primary specialty in Irvine, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1902120439 |
| 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