Karen Grante Bonnanzio, OD
- Medicare patients, 2024
- 97
- Part D claims, 2024
- 205
- Industry payments
- $285
- Affiliated sites
- 3
- Medical groups
- 3
- Practice address
- 3528 E Main St, Waterbury, CT 06705
- Practice phone
- Call (203) 377-3934
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Oec Waterbury
Waterbury, Connecticut
Find Karen Bonnanzio'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.
Karen Grante Bonnanzio is an optometrist in Waterbury, Connecticut
Karen Bonnanzio practices at Oec Waterbury in Waterbury, Connecticut.
Karen Bonnanzio's NPI, 1508955873, was assigned on October 12, 2006. Karen Bonnanzio graduated from New England College of Optometry in 1993. Karen Bonnanzio holds Connecticut license 002346.
- NPI
- 1508955873NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8224046842
- NPI enumeration date
- October 12, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 377-3934
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Karen Grante Bonnanzio practices at Oec Waterbury in Waterbury, Connecticut
Karen Bonnanzio's primary practice is Oec Waterbury, at 3528 E Main St, Waterbury, CT 06705 in Naugatuck Vly County. The practice phone is (203) 377-3934.
- Oec Waterbury3528 E Main St, Waterbury, CT 06705 · Naugatuck Vly CountyPhone(203) 377-3934
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Karen Grante Bonnanzio is affiliated with 4 sites of care and 3 medical groups
Karen Bonnanzio's primary practice is Oec Waterbury in Waterbury, Connecticut. Dmand AI also links Karen Bonnanzio to 3 group practices and clinics and 3 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Karen Grante Bonnanzio's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Karen Bonnanzio practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Oec Waterbury | Available with a free account |
| +3 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Karen Grante Bonnanzio is one of 468 optometrists in Connecticut
Optometrist is Karen Bonnanzio's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Karen Bonnanzio is licensed in Connecticut.
Specialties and state licenses
- Optometrist, ConnecticutPrimary
Optometrists near Karen Bonnanzio
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
Karen Grante Bonnanzio treated 97 Medicare patients in 2024, average age 74
CMS counts 97 Medicare patients who saw Karen Bonnanzio in 2024. The largest group is 65 to 74, with 50 patients. 75% of them have high cholesterol, and 73% have high blood pressure. 14% are also on Medicaid. Their average risk score is 0.98, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Karen Bonnanzio's median patient age at 69, with 57% women.
Karen Bonnanzio's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Karen Bonnanzio's Medicare patients by sex, 2024
- Women5557%
- Men4243%
Chronic conditions among Karen Bonnanzio's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis38%
- Diabetes25%
- Anxiety22%
- Chronic kidney disease22%
- Ischemic heart disease20%
- Osteoporosis20%
Share of Medicare patients with each condition. A patient can have several.
Karen Bonnanzio's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women57%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Karen Grante Bonnanzio wrote 205 Medicare Part D claims in 2024
In 2024, Karen Bonnanzio wrote 205 Medicare Part D claims for 70 patients. 47% of them were for generic drugs.
Karen Bonnanzio's Part D claims by kind of drug, 2024
- Generic96 claims47%
- Brand-name109 claims53%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Karen Grante Bonnanzio takes part in Medicare
Karen Bonnanzio accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Karen Grante Bonnanzio received $285 in industry payments in 2025
CMS Open Payments shows 10 general payments to Karen Bonnanzio from 6 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Glaukos Corporation paid the most, $120.
Companies that paid Karen Bonnanzio the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Karen Grante Bonnanzio graduated from New England College of Optometry
Karen Bonnanzio graduated from New England College of Optometry in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Karen Grante Bonnanzio'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Karen Grante Bonnanzio
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Karen Grante Bonnanzio's NPI number?
Karen Grante Bonnanzio's NPI number is 1508955873. It was assigned on October 12, 2006, and it is active in the NPI Registry.
What does Karen Grante Bonnanzio specialize in?
Karen Grante Bonnanzio is an optometrist in Waterbury, Connecticut. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Karen Grante Bonnanzio practice?
Karen Bonnanzio practices at 3528 E Main St, Waterbury, CT 06705. Karen Bonnanzio's primary practice is Oec Waterbury in Waterbury, Connecticut. Dmand AI also links Karen Bonnanzio to 3 group practices and clinics and 3 medical groups.
What is Karen Grante Bonnanzio's office phone number?
The practice phone on file for Karen Bonnanzio is (203) 377-3934.
What is Karen Grante Bonnanzio's medical license number?
Karen Bonnanzio holds Connecticut license 002346.
Does Karen Grante Bonnanzio accept Medicare?
Yes. CMS lists Karen Bonnanzio as accepting Medicare assignment.
How many Medicare patients does Karen Grante Bonnanzio see?
CMS counts 97 Medicare patients who saw Karen Bonnanzio in 2024, with an average age of 74.
Where did Karen Grante Bonnanzio go to medical school?
Karen Bonnanzio graduated from New England College of Optometry in 1993.
Has Karen Grante Bonnanzio received payments from drug or device companies?
CMS Open Payments shows $285 in general payments to Karen Bonnanzio from 6 companies from 2025 to 2025. The largest total came from Glaukos Corporation.
How long has Karen Grante Bonnanzio been practicing?
Karen Bonnanzio graduated from medical school in 1993, 33 years ago.
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