Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark A Sibley, MD

Ophthalmology Physician in Fort Myers, FL · enumerated 2006.

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

National Provider Identifier

1184687089

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark A Sibley

Credential MD

Sex Male

Practice address 4101 Evans Ave, Fort Myers, FL, 33901

Phone (239) 939-3456

Fax (239) 939-1575

Enumeration date Apr 11, 2006

Last updated in NPPES May 21, 2019

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License ME30852 (FL) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License AS9252040 (FL) Primary

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
039453000	Medicaid	FL	-
62253	Other	FL	BLUE CROSS

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 this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Mark Sibley?

Mark Sibley is registered in NPPES with the primary taxonomy of Ophthalmology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-05-21.