Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Mark Sigmon, OD

Optometrist in Hickory, NC · enumerated 2005 · practices at Bartlett Grigsby Boan & Assoc Pllc.

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

National Provider Identifier

1205821550

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Registry record

Entity type Individual (Type 1)

Name Dr. William Mark Sigmon

Credential OD

Sex Male

Practice address 1060 Lenoir Rhyne Blvd Se, Hickory, NC, 28602

Phone (828) 328-3900

Fax (828) 328-5253

Enumeration date Sep 13, 2005

Last updated in NPPES Feb 19, 2020

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 1232 (NC) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier	Type	State	Issuer
8909071	Medicaid	NC	-
09071	Other	NC	BCBS-NC

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

How do I verify William Sigmon's NPI record?

Cross-check NPI 1205821550 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1205821550 active?

Yes, as of the latest NPPES snapshot, NPI 1205821550 is active (record last updated 2020-02-19).

Other providers at this practice address

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Thomas Boan Optometrist · Hickory, NC NPI 1699776096 Bartlett Grigsby Boan & Assoc Pllc Optometrist · Hickory, NC NPI 1801849302

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-19.