Quick answers
- Does Akinwunmi O. Oni-Orisan accept Medicare assignment?
- Yes. Medicare's clinician data says Akinwunmi O. Oni-Orisan 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 Akinwunmi O. Oni-Orisan see?
- In 2024, CMS data shows 458 Original Medicare patients and 1,423 services for Akinwunmi O. Oni-Orisan. This counts Original Medicare only and measures volume, not quality.
- What is Akinwunmi O. Oni-Orisan's NPI number?
- 1831414770. 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 Akinwunmi O. Oni-Orisan, 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 | 458 |
|---|---|
| Services billed to Medicare | 1,423 |
| Different services or procedures | 83 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)204 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)162 services
- Critical care, first 30-74 minutes (99291)156 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)132 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)75 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%
- Arthritis66%
- Stroke or mini-stroke51%
- Diabetes40%
- Ischemic heart disease40%
Hospitals where Akinwunmi O. Oni-Orisan works
Medicare's Facility Affiliation Data lists Akinwunmi O. Oni-Orisan 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.
- Adventist Health Simi ValleySimi Valley, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050236
- Community Memorial Hospital - VenturaVentura, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050394
- Northridge Hospital Medical CenterNorthridge, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050116
- Santa Barbara Cottage HospitalSanta Barbara, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050396
- St Johns Regional Medical CenterOxnard, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050082
Practice locations
Addresses where Akinwunmi O. Oni-Orisan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1901 Outlet Ctr Dr, Suite 210Oxnard, CA 93036 (805) 983‑0425
Group practices
Medicare enrollment lists Akinwunmi O. Oni-Orisan as a member of these groups (CMS data updated October 2, 2026).
- Link Neuroscience Institute PC16 clinicians in the group
- Link In-Patient Services PC12 clinicians in the group
Specialties
- Neurosurgeryprimary
- Neurologyalso
Other neurosurgeons in Oxnard
Clinicians with the same Medicare primary specialty in Oxnard, CA — not a recommendation.
Other clinicians in Link Neuroscience Institute PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wayne State University School Of Medicine |
| Graduation year | 2010 (16 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1831414770 |
| 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