Dr. Oksana Kloyzner, MD
- Medicare services, 2024
- 555
- Medicare patients, 2024
- 106
- Part D claims, 2024
- 30,137
- Hospital affiliations
- 2
- Industry payments
- $195
- Practice address
- 130 Division St, Derby, CT 06418
- Practice phone
- Call (203) 732-7500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Kloyzner'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.
Dr. Oksana Kloyzner is an internist in Derby, Connecticut
Dr. Kloyzner practices at Griffin Hospital in Derby, Connecticut, part of Griffin Hospital.
Dr. Kloyzner's NPI, 1093791204, was assigned on December 20, 2005. Dr. Kloyzner holds Connecticut license 0397654.
- NPI
- 1093791204NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4486804911
- NPI enumeration date
- December 20, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 732-7500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Oksana Kloyzner practices at 2 locations in Derby, Connecticut
Dr. Kloyzner's primary practice is Griffin Hospital, at 130 Division St, Derby, CT 06418 in New Haven County. The practice phone is (203) 732-7500. Dr. Kloyzner also practices at Griffin Hospital, 144 Division St, Derby, CT 06418.
- Griffin HospitalPrimary130 Division St, Derby, CT 06418 · New Haven CountyPhone(203) 732-7500
- Griffin Hospital144 Division St, Derby, CT 06418 · Naugatuck Vly CountyPhone(203) 732-7360
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Oksana Kloyzner is affiliated with 6 sites of care and 1 medical group
Dr. Kloyzner's primary practice is Griffin Hospital in Derby, Connecticut, part of Griffin Hospital. Dr. Kloyzner is also affiliated with Hartford Hospital. The medical group on file is Collins Medical Associates 2, P.C. Dmand AI also links Dr. Kloyzner to 1 more physician office, 1 group practice or clinic, 1 hospice and 1 skilled nursing facility, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Oksana Kloyzner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kloyzner practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Griffin Hospital | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Griffin Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Oksana Kloyzner is one of 2,189 internists in Connecticut
Internal medicine is Dr. Kloyzner's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Kloyzner is licensed in Connecticut.
Specialties and state licenses
- Internal medicine, ConnecticutPrimary
Internists near Dr. Kloyzner
Counts of internists 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
Dr. Oksana Kloyzner billed Medicare for 555 services in 2024
CMS data shows 555 Medicare services from Dr. Kloyzner across 6 procedure codes in 2024, for 106 Medicare patients. Medicare paid $38,162 for them.
Dr. Kloyzner's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6292024: 45727%
- Lab and pathology
- 2023: 722024: 5228%
- Tests and treatments
- 2023: 652024: 4629%
- Other services
- 2023: 152024: 0100%
Where Dr. Kloyzner's Medicare services took place, 2024
- In an office51192%
- In a facility448%
Dr. Kloyzner compared with the Connecticut median for internists, 2024
- Dr. Kloyzner
- Connecticut median
- Medicare services
- 555vs 39042% above
- Medicare patients
- 106vs 17238% below
- Part D claims
- 29,355vs 34385.6 times
Medians across 2,185 internists in Connecticut with Dmand AI profiles that report each measure.
Dr. Kloyzner's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Kloyzner?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kloyzner and other internists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Oksana Kloyzner treated 106 Medicare patients in 2024, average age 74
CMS counts 106 Medicare patients who saw Dr. Kloyzner in 2024. The largest group is 65 to 74, with 32 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 75% are also on Medicaid. Their average risk score is 1.87, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Kloyzner's median patient age at 68, with 61% women.
Dr. Kloyzner's Medicare patients by age, 2024
Dr. Kloyzner's Medicare patients by sex, 2024
- Women5552%
- Men5148%
Chronic conditions among Dr. Kloyzner's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease45%
- Diabetes42%
- Arthritis38%
- Mood disorders36%
- Anxiety33%
- Depression31%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kloyzner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women61%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Oksana Kloyzner wrote 30,137 Medicare Part D claims in 2024
In 2024, Dr. Kloyzner wrote 30,137 Medicare Part D claims for 380 patients. 89% of them were for generic drugs. CMS names the drug for 29,355 of them, across 189 drugs with 11 or more claims each, at $1,611,228 in total drug cost. In 2023, CMS named 20,205 claims across 184 drugs.
Dr. Kloyzner's Part D claims by kind of drug, 2024
- Generic26,765 claims89%
- Brand-name3,288 claims11%
- Other84 claims0%
Dr. Kloyzner's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Kloyzner's Part D claims, 2024
- Opioids0%49 of 30,137 claims
- Antibiotics0%132 of 30,137 claims
- Antipsychotics, patients 65 and over3%995 of 30,137 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 20,2052024: 29,35545%
Drugs named by CMS: 189 in 2024, 184 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Oksana Kloyzner takes part in Medicare
Dr. Kloyzner 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Oksana Kloyzner received $195 in industry payments from 2018 to 2024
CMS Open Payments shows 6 general payments to Dr. Kloyzner from 4 drug and device companies from 2018 to 2024. Food and beverage make up the largest share, 86% of the total. Pfizer Inc. paid the most, $130.
General payments to Dr. Kloyzner by program year, 2018 to 2024
General payments to Dr. Kloyzner by kind, 2018 to 2024
- Food and beverage$16786%
- Education$2814%
Companies that paid Dr. Kloyzner the most, 2018 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Oksana Kloyzner'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 Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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 and Drug (CMS) (opens in a new tab)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) |
| 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 Dr. Oksana Kloyzner
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Oksana Kloyzner's NPI number?
Dr. Oksana Kloyzner's NPI number is 1093791204. It was assigned on December 20, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Oksana Kloyzner?
Dr. Oksana Kloyzner is an internist in Derby, Connecticut. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Oksana Kloyzner practice?
Dr. Kloyzner practices at 130 Division St, Derby, CT 06418. Dr. Kloyzner also practices at 144 Division St, Derby, CT 06418. Dr. Kloyzner's primary practice is Griffin Hospital in Derby, Connecticut, part of Griffin Hospital. Dmand AI also links Dr. Kloyzner to 1 physician office, 1 group practice or clinic, 1 hospice and 1 skilled nursing facility.
What is Dr. Oksana Kloyzner's office phone number?
The practice phone on file for Dr. Kloyzner is (203) 732-7500.
What is Dr. Oksana Kloyzner's medical license number?
Dr. Kloyzner holds Connecticut license 0397654.
Which hospitals is Dr. Oksana Kloyzner affiliated with?
Dr. Kloyzner practices at Griffin Hospital in Derby, Connecticut. Dr. Kloyzner is also affiliated with Hartford Hospital.
What medical group is Dr. Oksana Kloyzner part of?
Dr. Kloyzner is linked to Collins Medical Associates 2, P.C.
Does Dr. Oksana Kloyzner accept Medicare?
Yes. CMS data shows Dr. Kloyzner billed Medicare for 555 services in 2024, and Dr. Kloyzner accepts Medicare assignment.
How many Medicare patients does Dr. Oksana Kloyzner see?
CMS counts 106 Medicare patients who saw Dr. Kloyzner in 2024, with an average age of 74.
What services does Dr. Oksana Kloyzner bill to Medicare?
In 2024, Dr. Kloyzner's most billed Medicare services were office visit, established patient (99214), nursing facility care (99308) and lab and pathology test (82962).
Show 3 more questionsShow fewer questions
What drugs does Dr. Oksana Kloyzner prescribe most?
In 2024 Medicare Part D data, Dr. Kloyzner's most prescribed drugs by claims were Atorvastatin Calcium, Trazodone HCl and Amlodipine Besylate.
Has Dr. Oksana Kloyzner received payments from drug or device companies?
CMS Open Payments shows $195 in general payments to Dr. Kloyzner from 4 companies from 2018 to 2024. The largest total came from Pfizer Inc.
How long has Dr. Oksana Kloyzner been practicing?
Dr. Kloyzner graduated from medical school in 1986, 40 years ago.
Selling to internal medicine practices?
See internists in Connecticut by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card