Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ronald William Douville, OD

Optometrist in Merrimack, NH · enumerated 2006.

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

National Provider Identifier

1679515043

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Registry record

Entity type Individual (Type 1)

Name Dr. Ronald William Douville

Credential OD

Sex Male

Practice address 395 Daniel Webster Hwy, Merrimack, NH, 03054

Phone (603) 424-4030

Fax (603) 424-7277

Enumeration date Jun 12, 2006

Last updated in NPPES Nov 9, 2007

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 355 (NH) Primary

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

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

Is NPI 1679515043 active?

Yes, as of the latest NPPES snapshot, NPI 1679515043 is active (record last updated 2007-11-09).

How do I verify Ronald Douville's NPI record?

Cross-check NPI 1679515043 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Mark N De Puy DDS Pllc General Practice Dentistry · Merrimack, NH NPI 1740497189 Ronald W. Douville Professional Association Optometrist · Merrimack, NH NPI 1043491905

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-11-09.