Quick answers
- Does Ahren A. Arase accept Medicare assignment?
- Yes. Medicare's clinician data says Ahren A. Arase 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 Ahren A. Arase see?
- In 2024, CMS data shows 19 Original Medicare patients and 21 services for Ahren A. Arase. This counts Original Medicare only and measures volume, not quality.
- What is Ahren A. Arase's NPI number?
- 1417244930. 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 Ahren A. Arase, 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 | 19 |
|---|---|
| Services billed to Medicare | 21 |
| Different services or procedures | 4 |
| Participating Medicare provider | Yes |
| Average age of these patients | 64 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)11 services
Practice locations
Addresses where Ahren A. Arase is enrolled with Medicare (CMS data updated October 2, 2026).
- 20000 Rinaldi StPorter Ranch, CA 91326 (877) 608‑0044
- 5601 De Soto AveWoodland Hills, CA 91367 (818) 719‑2000
Group practices
Medicare enrollment lists Ahren A. Arase as a member of this group (CMS data updated October 2, 2026).
- Southern California Permanente Medical Group11,293 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Porter Ranch
Clinicians with the same Medicare primary specialty in Porter Ranch, CA — not a recommendation.
Other clinicians in Southern California Permanente Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rush Medical College Of Rush University |
| Graduation year | 2011 (15 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1417244930 |
| 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
- 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