OrganizationActive
Dr John a Duggan Inc
NPI 1265507826 · Optometrist · Chelmsford, MA
Dr John a Duggan Inc is a Optometrist organization in Chelmsford, MA (NPI 1265507826).
Provider details
- NPI number
- 1265507826
- Entity type
- Organization
- Primary specialty
- OptometristEye and Vision Services Providers
- Organization subpart
- No
- Authorized official
- John Duggan, President(978) 453-3541
- License
- 2186 (MA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
3 Courthouse Ln
Unit 1
Chelmsford, MA 01824
Phone: (978) 453-3541
Fax: (978) 458-3598
Street-level locationGet directions
Mailing address
3 Courthouse Ln
Chelmsford, MA 01824
Registry dates
- Enumerated
- 2006-11-21
- Last updated
- 2009-12-07
Frequently asked questions
- What is Dr John a Duggan Inc's NPI number?
- Dr John a Duggan Inc's National Provider Identifier (NPI) is 1265507826, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Dr John a Duggan Inc?
- Dr John a Duggan Inc is classified in the NPPES registry as Optometrist (Eye and Vision Services Providers).
- Where is Dr John a Duggan Inc located?
- Dr John a Duggan Inc's practice location on file with NPPES is 3 Courthouse Ln, Chelmsford, MA 01824.
- What is Dr John a Duggan Inc's phone number?
- The practice phone number listed in the NPPES registry for Dr John a Duggan Inc is (978) 453-3541.
- Who is the authorized official for Dr John a Duggan Inc?
- The authorized official listed on Dr John a Duggan Inc's NPPES record is John Duggan, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Dr John a Duggan Inc's NPI active?
- Yes — Dr John a Duggan Inc's NPI (1265507826) is active in the NPPES registry as of the last update on 2009-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.