Quick answers
- Does Ramin Mehdian accept Medicare assignment?
- Yes. Medicare's clinician data says Ramin Mehdian 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 Mehdian see?
- In 2024, CMS data shows 1,024 Original Medicare patients and 5,995 services for Ramin Mehdian. This counts Original Medicare only and measures volume, not quality.
- What is Ramin Mehdian's NPI number?
- 1053457127. 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 Mehdian, 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 | 1,024 |
|---|---|
| Services billed to Medicare | 5,995 |
| Different services or procedures | 35 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,480 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)820 services
- Critical care, first 30-74 minutes (99291)616 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)559 services
- Test to measure expiratory airflow and volume changes before and after medication administration (94060)333 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%
- Arthritis61%
- COPD55%
- Ischemic heart disease50%
- Diabetes41%
Hospitals where Ramin Mehdian works
Medicare's Facility Affiliation Data lists Ramin Mehdian 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.
- Los Robles Hospital & Medical CenterThousand Oaks, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050549
- Northridge Hospital Medical CenterNorthridge, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050116
Practice locations
Addresses where Ramin Mehdian is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 Newbury Rd, Suite 275Newbury Park, CA 91320 (805) 499‑4143
Specialties
- Pulmonary Diseaseprimary
- Critical Care (Intensivists)also
- Internal Medicinealso
- Sleep Medicinealso
Other pulmonologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 1995 (31 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) | 1053457127 |
| 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