Quick answers
- Which hospitals does Abraham Harn work at?
- Medicare's official clinician data lists Abraham Harn at 4 hospitals: AHMC Anaheim Regional Medical Center, Anaheim Global Medical Center, Orange County Global Medical Center and UCI Health-Orange. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Abraham Harn see patients?
- Medicare's clinician data lists 2 practice locations, including Tustin, CA and Santa Ana, CA. Call before your visit to confirm the address.
- What is Abraham Harn's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Abraham Harn accept Medicare assignment?
- Yes. Medicare's clinician data says Abraham Harn 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 Abraham Harn?
- (714) 573-8200, as listed in official Medicare / NPI Registry data.
- What is Abraham Harn's NPI number?
- 1003337122. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Abraham Harn works
Medicare's Facility Affiliation Data lists Abraham Harn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- AHMC Anaheim Regional Medical CenterAnaheim, CA · Acute Care Hospital · CCN 050226
- Anaheim Global Medical CenterAnaheim, CA · Acute Care Hospital · CCN 050744
- Orange County Global Medical CenterSanta Ana, CA · Acute Care Hospital · CCN 050746
- UCI Health-OrangeOrange, CA · Acute Care Hospital · CCN 050348
Practice locations
Addresses where Abraham Harn is enrolled with Medicare (CMS data updated 2026-10-02).
- 13522 Newport Ave, Suite 102Tustin, CA 92780 (714) 573‑8200
- 999 N Tustin Ave, Suite 1Santa Ana, CA 92705 (714) 836‑6800
Group practices
Medicare enrollment lists Abraham Harn as a member of this group (CMS data updated 2026-10-02).
- Chest and Critical Care Consultants a Medical Group71 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Tustin
Clinicians with the same Medicare primary specialty in Tustin, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Middlesex University School Of Medicine |
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003337122 |
| 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