Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Ronald W. Douville Professional Association

Optometrist in Merrimack, NH · enumerated 2007 · authorized official Ronald Douville,, President.

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

National Provider Identifier

1043491905

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Registry record

Entity type Organization (Type 2)

Legal business name Ronald W. Douville Professional Association

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

Phone (603) 424-4030

Fax (603) 424-7277

Enumeration date Nov 20, 2007

Last updated in NPPES Feb 25, 2016

Taxonomy & classification

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

Authorized official

Name Ronald Douville,

Title President

Phone (603) 424-4030

Other identifiers

Identifier	Type	State	Issuer
80587884	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 current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2016-02-25. Verify at npiregistry.cms.hhs.gov.

Where is Ronald W. Douville Professional Association located?

The practice location on file with NPPES is in Merrimack, NH.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-02-25.