Quick answers
- Does Ramin I. Alizadeh accept Medicare assignment?
- Yes. Medicare's clinician data says Ramin I. Alizadeh 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 I. Alizadeh see?
- In 2024, CMS data shows 252 Original Medicare patients and 2,616 services for Ramin I. Alizadeh. This counts Original Medicare only and measures volume, not quality.
- What is Ramin I. Alizadeh's NPI number?
- 1659427235. 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 I. Alizadeh, 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 | 252 |
|---|---|
| Services billed to Medicare | 2,616 |
| Different services or procedures | 44 |
| Participating Medicare provider | Yes |
| Average age of these patients | 81 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)594 services
- Insertion of needle into vein for collection of blood sample (36415)290 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)249 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)114 services
- Automated urinalysis test (81003)92 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 blood pressure75%
- High cholesterol75%
- Arthritis52%
- Ischemic heart disease42%
- Osteoporosis26%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)24%
Hospitals where Ramin I. Alizadeh works
Medicare's Facility Affiliation Data lists Ramin I. Alizadeh 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.
- Hoag Memorial Hospital PresbyterianNewport Beach, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050224
- 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 I. Alizadeh is enrolled with Medicare (CMS data updated October 2, 2026).
- 400 Newport Ctr Dr, Suite 601Newport Beach, CA 92660 (949) 520‑7322
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Newport Beach
Clinicians with the same Medicare primary specialty in Newport Beach, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Colorado School Of Medicine, Denver |
| Graduation year | 2006 (20 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) | 1659427235 |
| 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