Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Damien Joseph Gietzen, OD
Optometrist in Guilford, CT · enumerated 2020.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1629687835
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Registry record
Entity type Individual (Type 1)
Name Dr. Damien Joseph Gietzen
Credential OD
Sex Male
Practice address 37 Soundview Rd, Guilford, CT, 06437
Phone (203) 453-2222
Enumeration date Jul 24, 2020
Last updated in NPPES Sep 15, 2021
Taxonomy & licenses
152WL0500X Low Vision Rehabilitation Optometrist Eye and Vision Services Providers · License 003155 (CT) Secondary
152WV0400X Vision Therapy Optometrist Eye and Vision Services Providers · License 003155 (CT) Secondary
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.
Frequently asked questions
Is NPI 1629687835 active?
Yes, as of the latest NPPES snapshot, NPI 1629687835 is active (record last updated 2021-09-15).
How do I verify Damien Gietzen's NPI record?
Cross-check NPI 1629687835 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
Browse all → William Padula Low Vision Rehabilitation Optometrist · Guilford, CT NPI 1881770477 Integrative Physical Therapy, LLC Physical Therapist · Guilford, CT NPI 1265568281 Padula Institute of Vision Rehabilitation, LLC Low Vision Rehabilitation Optometrist · Guilford, CT NPI 1871783076 Ayra Sayyed Optometrist · Guilford, CT NPI 1528667250
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-09-15.