Dr. William John Bigham, MD

Dr. William John Bigham is a Ophthalmology Physician provider (Ophthalmology) practicing in Coronado, CA, registered in the NPPES registry with NPI 1104893692 since 2006. The credential MD stands for Doctor of Medicine. Practices at Island Eye Specialists, Apc (listed at the same practice address in NPPES).

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NPI	1104893692
Entity type	Individual (Type 1)
Name	Dr. William John Bigham
Credential	MD
Sex	Male
Practice address	1317 YNEZ PL STE A, Coronado, CA, 92118
Phone	6194358800
Fax	6194359197
Enumeration date	2006-03-02
Last updated in NPPES	2007-07-08

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
207W00000X	Ophthalmology Physician	Primary	G54117	CA

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

Copy-ready billing details

Provider: William Bigham, MD
NPI: 1104893692
Taxonomy: 207W00000X (Ophthalmology Physician)
Address: 1317 YNEZ PL STE A, Coronado, CA, 92118

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1982714119	Ann Siefert	Individual	Dermatology Physician	Coronado, CA
1154008027	Island Eye Specialists, Apc	Organization	Ophthalmology Physician	Coronado, CA

Verify this record

Cross-check NPI 1104893692 against the authoritative CMS record: view Dr. William John Bigham on the official NPPES registry .

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. Read the full guide or validate an NPI number.

Frequently asked questions

What specialty is William Bigham?

William Bigham 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.

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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.