Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Alfred C Marrone, M.D.

Ophthalmology Physician in Torrance, CA · enumerated 2006 · practices at Alfred C. Marrone, MD A Medical Corp.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1841388907

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Registry record

Entity type Individual (Type 1)

Name Alfred C Marrone

Credential M.D.

Sex Male

Practice address Torrance, CA, 90505

Phone (310) 530-0300

Fax (310) 530-2367

Enumeration date Oct 11, 2006

Last updated in NPPES Oct 17, 2019

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License G24447 (CA) Primary

208200000X Plastic Surgery Physician Allopathic & Osteopathic Physicians · License G24447 (CA) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
DY3050	Other	CA	RAILROAD MEDICARE GROUP PTAN
756181273	Other	CA	RR MEDICARE

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is NPI 1841388907 active?

Yes, as of the latest NPPES snapshot, NPI 1841388907 is active (record last updated 2019-10-17).

How do I verify Alfred Marrone's NPI record?

Cross-check NPI 1841388907 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Alfred C. Marrone, MD A Medical Corp Ophthalmology Physician · Torrance, CA NPI 1871866715

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-10-17.