Quick answers
- Which hospitals does Nicholas A. Rensing work at?
- Medicare's official clinician data lists Nicholas A. Rensing at 2 hospitals: Eisenhower Medical Center and Hoag Memorial Hospital Presbyterian. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nicholas A. Rensing see patients?
- Medicare's clinician data lists 1 practice location in Aliso Viejo, CA. Call before your visit to confirm the address.
- What is Nicholas A. Rensing's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Nicholas A. Rensing accept Medicare assignment?
- Yes. Medicare's clinician data says Nicholas A. Rensing accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Nicholas A. Rensing?
- (949) 791-3199, as listed in official Medicare / NPI Registry data.
- What is Nicholas A. Rensing's NPI number?
- 1598452823. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nicholas A. Rensing works
Medicare's Facility Affiliation Data lists Nicholas A. Rensing at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Eisenhower Medical CenterRancho Mirage, CA · Acute Care Hospital · CCN 050573
- Hoag Memorial Hospital PresbyterianNewport Beach, CA · Acute Care Hospital · CCN 050224
Practice locations
Addresses where Nicholas A. Rensing is enrolled with Medicare (CMS data updated 2026-10-02).
- 26671 Aliso Creek Rd, Suite 206Aliso Viejo, CA 92656 (949) 791‑3199
Group practices
Medicare enrollment lists Nicholas A. Rensing as a member of this group (CMS data updated 2026-10-02).
- Hoag Clinic460 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Aliso Viejo
Clinicians with the same Medicare primary specialty in Aliso Viejo, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Kansas City University Of Physicians And Surgeons |
| Graduation year | 2023 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598452823 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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