Quick answers
- Does Alfred C. Marrone accept Medicare assignment?
- Yes. Medicare's clinician data says Alfred C. Marrone 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 Alfred C. Marrone see?
- In 2024, CMS data shows 706 Original Medicare patients and 1,874 services for Alfred C. Marrone. This counts Original Medicare only and measures volume, not quality.
- What is Alfred C. Marrone's NPI number?
- 1841388907. 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 Alfred C. Marrone, 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 | 706 |
|---|---|
| Services billed to Medicare | 1,874 |
| Different services or procedures | 53 |
| Participating Medicare provider | Yes |
| Average age of these patients | 79 |
Most frequent services
- Established patient problem focused exam of visual system (92012)499 services
- Established patient complete exam of visual system (92014)420 services
- Exam of visual field with extended testing (92083)185 services
- Imaging of optic nerve (92133)135 services
- Photography of content of eyes (92285)99 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%
- Arthritis47%
- Diabetes28%
- Ischemic heart disease25%
- Chronic kidney disease25%
Practice locations
Addresses where Alfred C. Marrone is enrolled with Medicare (CMS data updated October 2, 2026).
- 23441 Madison St, Suite 120Torrance, CA 90505 (310) 373‑6708
Group practices
Medicare enrollment lists Alfred C. Marrone as a member of this group (CMS data updated October 2, 2026).
- East-West Eye Institute a Medical Corporation16 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Torrance
Clinicians with the same Medicare primary specialty in Torrance, CA — not a recommendation.
Other clinicians in East-West Eye Institute a Medical Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York Downstate Medical Center |
| Graduation year | 1971 (55 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841388907 |
| 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