Alfred Marrone, M.D.
NPI 1841388907 · Ophthalmology Physician · Torrance, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alfred Marrone, M.D. is a Ophthalmology Physician provider in Torrance, CA (NPI 1841388907).
Provider details
- NPI number
- 1841388907
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G24447 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,746 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Problem Focused Exam of Visual System92012 | 499 | $103 |
| Established Patient Complete Exam of Visual System92014 | 420 | $145 |
| Exam of Visual Field With Extended Testing92083 | 185 | $74 |
| Imaging of Optic Nerve92133 | 135 | $39 |
| Photography of Content of Eyes92285 | 99 | $27 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 63 | $144 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 197 | 61 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 169 | 51 |
| Cephalexin | 154 | 136 |
| Ofloxacin | 134 | 105 |
| Tobramycin/Dexamethasonebrand: Tobramycin-Dexamethasone | 93 | 63 |
| Ketorolac Tromethamine | 68 | 48 |
| Bacitracin/Polymyxin B Sulfatebrand: Bacitracin-Polymyxin | 61 | 55 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$265 across 11 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-11
- Last updated
- 2019-10-17
Frequently asked questions
- What is Alfred Marrone's NPI number?
- Alfred Marrone's National Provider Identifier (NPI) is 1841388907, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alfred Marrone's specialty?
- Alfred Marrone is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Alfred Marrone located?
- Alfred Marrone's practice location on file with NPPES is 23441 Madison St Ste 120, Torrance, CA 90505-4734.
- What is Alfred Marrone's phone number?
- The practice phone number listed in the NPPES registry for Alfred Marrone is (310) 530-0300.
- Does Alfred Marrone accept Medicare?
- Alfred Marrone is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alfred Marrone's NPI active?
- Yes — Alfred Marrone's NPI (1841388907) is active in the NPPES registry as of the last update on 2019-10-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.