Dr. Alfred C. Marrone, MD
- Medicare services, 2024
- 1,746
- Medicare patients, 2024
- 706
- Part D claims, 2024
- 1,396
- MIPS score, 2024
- 84
- Industry payments
- $1,807
- Practice address
- 23441 Madison St, Torrance, CA 90505
- Practice phone
- Call (310) 375-6461
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
The Endoscopy Center at Skypark - Torrance
Torrance, California
Find Dr. Marrone's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Alfred C. Marrone is an ophthalmologist in Torrance, California
Dr. Marrone practices at The Endoscopy Center at Skypark - Torrance in Torrance, California.
Dr. Marrone's NPI, 1841388907, was assigned on October 11, 2006. Dr. Marrone graduated from SUNY Downstate Health Sciences University in 1971. Dr. Marrone holds California license G24447.
- NPI
- 1841388907NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8224205950
- NPI enumeration date
- October 11, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 375-6461
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 81
- Medical school graduation
- 1971
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alfred C. Marrone practices at The Endoscopy Center at Skypark - Torrance in Torrance, California
Dr. Marrone's primary practice is The Endoscopy Center at Skypark - Torrance, at 23441 Madison St, Torrance, CA 90505 in Los Angeles County. The practice phone is (310) 375-6461.
- The Endoscopy Center at Skypark - Torrance23441 Madison St, Torrance, CA 90505 · Los Angeles CountyPhone(310) 375-6461
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Alfred C. Marrone is affiliated with 3 sites of care and 1 medical group
Dr. Marrone's primary practice is The Endoscopy Center at Skypark - Torrance in Torrance, California. Dmand AI also links Dr. Marrone to 1 physician office, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Alfred C. Marrone's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marrone practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The Endoscopy Center at Skypark - Torrance | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alfred C. Marrone is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Marrone's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Marrone is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Marrone's licenses on file in 2 states: California and Pennsylvania.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
- Pennsylvania license
Clinical focus
Dmand AI lists age-related macular degeneration, cataract, cataract surgery with lens implant, conjunctivitis, dry eye, eye infection or inflammation, eyelid inflammation and glaucoma among the conditions Dr. Marrone treats.
Ophthalmologists near Dr. Marrone
Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Alfred C. Marrone billed Medicare for 1,746 services in 2024
CMS data shows 1,746 Medicare services from Dr. Marrone across 19 procedure codes in 2024, for 706 Medicare patients. Medicare paid $170,550 for them.
Dr. Marrone's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,7412024: 1,52712%
- Surgery
- 2023: 1412024: 12611%
- Office and hospital visits
- 2023: 752024: 784%
- Imaging
- 2023: 262024: 1542%
Where Dr. Marrone's Medicare services took place, 2024
- In an office1,68396%
- In a facility634%
Dr. Marrone compared with the California median for ophthalmologists, 2024
- Dr. Marrone
- California median
- Medicare services
- 1,746vs 1,07962% above
- Medicare patients
- 706vs 42168% above
- Part D claims
- 1,252vs 6182.0 times
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Marrone's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Marrone?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marrone and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Alfred C. Marrone treated 706 Medicare patients in 2024, average age 79
CMS counts 706 Medicare patients who saw Dr. Marrone in 2024. The largest group is 75 to 84, with 301 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 4% are also on Medicaid. Their average risk score is 1.09, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Marrone's median patient age at 75, with 61% women.
Dr. Marrone's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Marrone's Medicare patients by sex, 2024
- Women45765%
- Men24935%
Chronic conditions among Dr. Marrone's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis47%
- Diabetes28%
- Chronic kidney disease25%
- Ischemic heart disease25%
- Osteoporosis23%
- Anxiety18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marrone's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women61%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Alfred C. Marrone wrote 1,396 Medicare Part D claims in 2024
In 2024, Dr. Marrone wrote 1,396 Medicare Part D claims for 445 patients. 83% of them were for generic drugs. CMS names the drug for 1,252 of them, across 18 drugs with 11 or more claims each, at $45,550 in total drug cost. In 2023, CMS named 1,195 claims across 19 drugs.
Dr. Marrone's Part D claims by kind of drug, 2024
- Generic1,159 claims83%
- Brand-name237 claims17%
Dr. Marrone's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Marrone's Part D claims, 2024
- Antibiotics19%271 of 1,396 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,1952024: 1,2525%
Drugs named by CMS: 18 in 2024, 19 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Alfred C. Marrone scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Marrone for performance year 2024, reported as part of a group. Dr. Marrone accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 62 procedures of cataract surgery by Dr. Marrone, more than 67% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Marrone's MIPS scores, performance year 2024
- 84of 100Final score
- 91.9of 100Quality
- 76of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Marrone ranks in Medicare procedure volume
- Cataract surgery
- 67th percentile62 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Alfred C. Marrone received $1,807 in industry payments from 2016 to 2025
CMS Open Payments shows 72 general payments to Dr. Marrone from 18 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Alcon Laboratories Inc paid the most, $445.
General payments to Dr. Marrone by program year, 2016 to 2025
General payments to Dr. Marrone by kind, 2016 to 2025
- Food and beverage$1,77298%
- Entertainment$352%
Companies that paid Dr. Marrone the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Alfred C. Marrone has 6 awards and honors on record
Dmand AI lists 6 awards for Dr. Marrone, most recently Honor Award in 2005.
Awards and honors for Dr. Marrone
- 2005
- Honor Award
- 2003
- 2003 Distinguished Alumnus Award
- 1999
- President
- Undated
- AAO Fellow
- Checkbook Top Doc
- Fellow
Source: Dmand AI Professional Profile Data
Dr. Alfred C. Marrone graduated from SUNY Downstate Health Sciences University
Dr. Marrone graduated from SUNY Downstate Health Sciences University in 1971. Dr. Marrone is a member of AAO and American Society of Oculofacial Plastic and Reconstructive Surgeons.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Alfred C. Marrone accepts plans from 19 insurance carriers
Dr. Marrone is in network with 19 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. HMO plans come from the most carriers, 13. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Excellus BlueCross BlueShield
- Blue Cross Blue Shield of Michigan
- HCSC
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- Humana
- +11 more carriersWith a free account
Plan types Dr. Marrone accepts, by number of carriers
- HMO13
- PPO12
- Medicare11
- POS7
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Alfred C. Marrone's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Alfred C. Marrone
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Alfred C. Marrone's NPI number?
Dr. Alfred C. Marrone's NPI number is 1841388907. It was assigned on October 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Alfred C. Marrone?
Dr. Alfred C. Marrone is an ophthalmologist in Torrance, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Alfred C. Marrone practice?
Dr. Marrone practices at 23441 Madison St, Torrance, CA 90505. Dr. Marrone's primary practice is The Endoscopy Center at Skypark - Torrance in Torrance, California. Dmand AI also links Dr. Marrone to 1 physician office, 1 group practice or clinic and 1 medical group.
What is Dr. Alfred C. Marrone's office phone number?
The practice phone on file for Dr. Marrone is (310) 375-6461.
What is Dr. Alfred C. Marrone's medical license number?
Dr. Marrone holds California license G24447, one of the licenses on file in 2 states.
Which states has Dr. Alfred C. Marrone been licensed in?
Dmand AI has state licenses on file for Dr. Marrone in California (1973 to 2026) and Pennsylvania (1976 to 1978).
Does Dr. Alfred C. Marrone accept Medicare?
Yes. CMS data shows Dr. Marrone billed Medicare for 1,746 services in 2024, and Dr. Marrone accepts Medicare assignment.
What is Dr. Alfred C. Marrone's MIPS score?
Dr. Marrone's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
How many Medicare patients does Dr. Alfred C. Marrone see?
CMS counts 706 Medicare patients who saw Dr. Marrone in 2024, with an average age of 79.
Is Dr. Alfred C. Marrone board certified?
Yes. Dr. Marrone is board certified in ophthalmology by the American Board of Ophthalmology.
Show 6 more questionsShow fewer questions
What services does Dr. Alfred C. Marrone bill to Medicare?
In 2024, Dr. Marrone's most billed Medicare services were eye exam or test (92012), eye exam or test (92014) and eye exam or test (92083).
Where did Dr. Alfred C. Marrone go to medical school?
Dr. Marrone graduated from SUNY Downstate Health Sciences University in 1971.
What drugs does Dr. Alfred C. Marrone prescribe most?
In 2024 Medicare Part D data, Dr. Marrone's most prescribed drugs by claims were Latanoprost, Dorzolamide-Timolol and Cephalexin.
Has Dr. Alfred C. Marrone received payments from drug or device companies?
CMS Open Payments shows $1,807 in general payments to Dr. Marrone from 18 companies from 2016 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. Alfred C. Marrone been practicing?
Dr. Marrone graduated from medical school in 1971, 55 years ago.
What insurance does Dr. Alfred C. Marrone accept?
Dr. Marrone is in network with 19 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. HMO plans come from the most carriers, 13. Check the plan with the practice before a visit.
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