Quick answers
- Which hospitals does John F. Maher work at?
- Medicare's official clinician data lists John F. Maher at 1 hospital: Providence Little Company of Mary Medical Center Torrance. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John F. Maher see patients?
- Medicare's clinician data lists 2 practice locations, including Torrance, CA and Anaheim, CA. Call before your visit to confirm the address.
- What is John F. Maher's specialty?
- Medicare lists Ophthalmology as the primary specialty.
- Does John F. Maher accept Medicare assignment?
- Yes. Medicare's clinician data says John F. Maher 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 John F. Maher?
- (424) 328-0091, as listed in official Medicare / NPI Registry data.
- What is John F. Maher's NPI number?
- 1265561211. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John F. Maher works
Medicare's Facility Affiliation Data lists John F. Maher 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
Practice locations
Addresses where John F. Maher is enrolled with Medicare (CMS data updated 2026-10-02).
- 22924 Crenshaw BlvdTorrance, CA 90505 (424) 328‑0091
- 5460 E La Palma AveAnaheim, CA 92807
Group practices
Medicare enrollment lists John F. Maher as a member of this group (CMS data updated 2026-10-02).
- Marshall B Ketchum University57 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Torrance
Clinicians with the same Medicare primary specialty in Torrance, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265561211 |
| 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