Quick answers
- Does Ramin Zabihi accept Medicare assignment?
- Yes. Medicare's clinician data says Ramin Zabihi 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.
- How many Medicare patients does Ramin Zabihi see?
- In 2024, CMS data shows 242 Original Medicare patients and 493 services for Ramin Zabihi. This counts Original Medicare only and measures volume, not quality.
- What is Ramin Zabihi's NPI number?
- 1508867193. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Ramin Zabihi, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 242 |
|---|---|
| Services billed to Medicare | 493 |
| Different services or procedures | 16 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)179 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)107 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)45 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)41 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)40 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure69%
- Arthritis54%
- Diabetes36%
- Depression35%
- Osteoporosis31%
Hospitals where Ramin Zabihi works
Medicare's Facility Affiliation Data lists Ramin Zabihi at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Providence Mission HospitalMission Viejo, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050567
Practice locations
Addresses where Ramin Zabihi is enrolled with Medicare (CMS data updated October 2, 2026).
- 26800 Crown Valley, Suite 308Mission Viejo, CA 92691
- 26800 Crown Valley Pkwy, Suite 308Mission Viejo, CA 92691 (949) 218‑4488
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Mission Viejo
Clinicians with the same Medicare primary specialty in Mission Viejo, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1508867193 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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