Dr. Alfred C. Marrone, MD

  • Torrance, CA
  • Ophthalmologist
NPI1841388907PAC ID8224205950
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
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Personal email
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Mobile number
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Social profiles

Primary practice

The Endoscopy Center at Skypark - Torrance

Torrance, California

See all 4 affiliations

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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 and contact details
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 - Torrance
    23441 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.

See all 4 affiliations for Dr. Marrone

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.

EHR by site
SiteEHR vendor and product
The Endoscopy Center at Skypark - TorranceAvailable with a free account
+2 more sites and 1 medical groupAvailable 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, CaliforniaPrimaryLicense G24447 · 1973 to 2026 · taxonomy 207W00000X
  • Pennsylvania license1976 to 1978

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.

Medicare services, 20241,746
Medicare patients706
Paid by Medicare$170,550
Procedure codes19

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.

See all procedures by Dr. Marrone

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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.

Medicare patients, 2024706
Average age79
Average risk score1.09
Also on Medicaid4%

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

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis47%
  4. Diabetes28%
  5. Chronic kidney disease25%
  6. Ischemic heart disease25%
  7. Osteoporosis23%
  8. 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.

Part D claims, 20241,396
Drugs named by CMS18
Total drug cost$45,550
Part D patients445

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.

See all prescribing by Dr. Marrone

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

$1.8Kin total
  • 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.

See all payments to Dr. Marrone

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

  1. 2005
    • Honor Award
  2. 2003
    • 2003 Distinguished Alumnus Award
  3. 1999
    • President
  4. 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.

  1. Medical schoolSUNY Downstate Health Sciences University
  2. Board certified in ophthalmologyAmerican Board of 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

  1. HMO13
  2. PPO12
  3. Medicare11
  4. POS7
  5. EPO4

Source: Dmand AI Insurance Network Data

Sources for Dr. Alfred C. Marrone's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors 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 paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand 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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