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

Dr. Mark William Harris, OD

Optometrist in Manchester, NH · enumerated 2006.

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

National Provider Identifier

1962500280

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark William Harris

Credential OD

Sex Male

Practice address Manchester, NH, 03103

Phone (603) 644-6100

Fax (603) 314-0404

Enumeration date Sep 20, 2006

Last updated in NPPES Jul 12, 2026

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

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License NH616 (NH) 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
30350210	Medicaid	NH	-

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 Mark Harris's NPI record?

Cross-check NPI 1962500280 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1962500280 active?

Yes, as of the latest NPPES snapshot, NPI 1962500280 is active (record last updated 2026-07-12).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-12.