John Nicholas Sienko, OD
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 821 N Main St Ext, Wallingford, CT 06492-2464
- Practice phone
- Call (203) 265-5152
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Wallingford Eye Care Center
Eye care practice · Wallingford, Connecticut
Find John Sienko's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
John Nicholas Sienko is an optometrist in Wallingford, Connecticut
John Sienko practices at Wallingford Eye Care Center in Wallingford, Connecticut.
John Sienko's NPI, 1194895524, was assigned on November 9, 2006. John Sienko graduated from New England College of Optometry in 1980. John Sienko holds Connecticut license 914.
- NPI
- 1194895524NPI Registry (opens in a new tab)
- NPI enumeration date
- November 9, 2006
- NPI status
- Active
- Practice phone
- (203) 265-5152
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
John Nicholas Sienko practices at Wallingford Eye Care Center in Wallingford, Connecticut
John Sienko's primary practice is Wallingford Eye Care Center, at 821 N Main St Ext, Wallingford, CT 06492-2464. The practice phone is (203) 265-5152.
- Wallingford Eye Care Center821 N Main St Ext, Wallingford, CT 06492-2464Phone(203) 265-5152
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
John Nicholas Sienko is affiliated with 1 site of care and 1 medical group
John Sienko's primary practice is Wallingford Eye Care Center in Wallingford, Connecticut. Dmand AI also links John Sienko to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at John Nicholas Sienko's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Sienko practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Wallingford Eye Care Center | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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John Nicholas Sienko is one of 468 optometrists in Connecticut
Optometrist is John Sienko's primary specialty in the NPI Registry, under taxonomy code 152W00000X. John Sienko is licensed in Connecticut.
Specialties and state licenses
- Optometrist, ConnecticutPrimary
Optometrists near John Sienko
Counts of optometrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
John Nicholas Sienko's patients have a median age of 70
Across all payers, Dmand AI patient panel data puts John Sienko's median patient age at 70, with 71% women.
John Sienko's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women71%
- Men25%
Source: Dmand AI Patient Panel Data
John Nicholas Sienko graduated from New England College of Optometry
John Sienko graduated from New England College of Optometry in 1980.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for John Nicholas Sienko's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about John Nicholas Sienko
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What is John Nicholas Sienko's NPI number?
John Nicholas Sienko's NPI number is 1194895524. It was assigned on November 9, 2006, and it is active in the NPI Registry.
What does John Nicholas Sienko specialize in?
John Nicholas Sienko is an optometrist in Wallingford, Connecticut. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does John Nicholas Sienko practice?
John Sienko practices at 821 N Main St Ext, Wallingford, CT 06492-2464. John Sienko's primary practice is Wallingford Eye Care Center in Wallingford, Connecticut. Dmand AI also links John Sienko to 1 medical group.
What is John Nicholas Sienko's office phone number?
The practice phone on file for John Sienko is (203) 265-5152.
What is John Nicholas Sienko's medical license number?
John Sienko holds Connecticut license 914.
Where did John Nicholas Sienko go to medical school?
John Sienko graduated from New England College of Optometry in 1980.
How long has John Nicholas Sienko been practicing?
John Sienko graduated from medical school in 1980, 46 years ago.
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