Quick answers
- Which hospitals does Denise A. Ishimaru work at?
- Medicare's official clinician data lists Denise A. Ishimaru at 2 hospitals: Providence Little Company of Mary Medical Center Torrance and Torrance Memorial Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Denise A. Ishimaru see patients?
- Medicare's clinician data lists 3 practice locations, including Torrance, CA and Redondo Beach, CA. Call before your visit to confirm the address.
- What is Denise A. Ishimaru's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Denise A. Ishimaru accept Medicare assignment?
- Yes. Medicare's clinician data says Denise A. Ishimaru 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 Denise A. Ishimaru?
- (310) 540-9600, as listed in official Medicare / NPI Registry data.
- What is Denise A. Ishimaru's NPI number?
- 1225219066. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Denise A. Ishimaru works
Medicare's Facility Affiliation Data lists Denise A. Ishimaru at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Providence Little Company of Mary Medical Center TorranceTorrance, CA · Acute Care Hospital · CCN 050353
- Torrance Memorial Medical CenterTorrance, CA · Acute Care Hospital · CCN 050351
Practice locations
Addresses where Denise A. Ishimaru is enrolled with Medicare (CMS data updated 2026-10-02).
- 20911 Earl St, Suite 220Torrance, CA 90503 (310) 540‑9600
- 4101 Torrance BlvdTorrance, CA 90503 (310) 303‑7496
- 520 N Prospect AveRedondo Beach, CA 90277
Group practices
Medicare enrollment lists Denise A. Ishimaru as a member of this group (CMS data updated 2026-10-02).
- Providence Medical Institute288 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Torrance
Clinicians with the same Medicare primary specialty in Torrance, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2004 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1225219066 |
| 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