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

Kenneth Robert Preston, OPTITIAN

Optician in Washington, DC · enumerated 2007.

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

National Provider Identifier

1952502734

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Registry record

Entity type Individual (Type 1)

Name Kenneth Robert Preston

Credential OPTITIAN

Sex Male

Practice address Washington, DC, 20009

Phone (202) 299-9109

Fax (202) 299-9109

Enumeration date May 30, 2007

Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

156FX1800X Optician Eye and Vision Services Providers Primary

Other identifiers

Identifier	Type	State	Issuer
OP1027	Other	DC	EYEMED VISION GROUP
920090	Other	DC	BLOCK VISION

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 → Validate an NPI →

Frequently asked questions

What specialty is Kenneth Preston?

Kenneth Preston is registered in NPPES with the primary taxonomy of Optician. 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 2026-07-13. Provider record last updated 2007-07-08.