Dr. Irwin David Feintzeig, MD
- Medicare services, 2024
- 542
- Medicare patients, 2024
- 234
- Part D claims, 2024
- 517
- MIPS score, 2024
- 21
- Industry payments
- $970
- Practice address
- 7 Cambridge Dr, Trumbull, CT 06611
- Practice phone
- Call (203) 301-9040
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Milford Dialysis
Trumbull, Connecticut
Find Dr. Feintzeig'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. Irwin David Feintzeig is a nephrologist in Trumbull, Connecticut
Dr. Feintzeig practices at Milford Dialysis in Trumbull, Connecticut.
Dr. Feintzeig's NPI, 1902805773, was assigned on July 14, 2005. Dr. Feintzeig graduated from University of Chicago Division of the Biological Sciences The Pritzker School of Medicine in 1979. Dr. Feintzeig holds Connecticut license 026343.
- NPI
- 1902805773NPI Registry (opens in a new tab)
- NPI enumeration date
- July 14, 2005
- NPI status
- Active
- Practice phone
- (203) 301-9040
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 73
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Irwin David Feintzeig practices at Milford Dialysis in Trumbull, Connecticut
Dr. Feintzeig's primary practice is Milford Dialysis, at 7 Cambridge Dr, Trumbull, CT 06611 in Greater Bridgeport County. The practice phone is (203) 301-9040.
- Milford Dialysis7 Cambridge Dr, Trumbull, CT 06611 · Greater Bridgeport CountyPhone(203) 301-9040
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Irwin David Feintzeig is affiliated with 2 sites of care and 1 medical group
Dr. Feintzeig's primary practice is Milford Dialysis in Trumbull, Connecticut. The medical group on file is Nephrology Associates, P.C. Dmand AI also links Dr. Feintzeig to 1 more group practice or clinic, 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 Dr. Irwin David Feintzeig's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Feintzeig practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Milford Dialysis | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Irwin David Feintzeig is one of 141 nephrologists in Connecticut
Nephrology is Dr. Feintzeig's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Feintzeig is licensed in Connecticut.
Specialties and state licenses
- Nephrology, ConnecticutPrimary
Nephrologists near Dr. Feintzeig
Counts of nephrologists 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. Irwin David Feintzeig billed Medicare for 542 services in 2024
CMS data shows 542 Medicare services from Dr. Feintzeig across 7 procedure codes in 2024, for 234 Medicare patients. Medicare paid $70,813 for them.
Dr. Feintzeig's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7362024: 31957%
- Tests and treatments
- 2023: 6052024: 22363%
Where Dr. Feintzeig's Medicare services took place, 2024
- In an office26248%
- In a facility28052%
Dr. Feintzeig compared with the Connecticut median for nephrologists, 2024
- Dr. Feintzeig
- Connecticut median
- Medicare services
- 542vs 73226% below
- Medicare patients
- 234vs 26110% below
- Part D claims
- 369vs 60039% below
Medians across 137 nephrologists in Connecticut with Dmand AI profiles that report each measure.
Dr. Feintzeig'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. Feintzeig?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Feintzeig and other nephrologists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Irwin David Feintzeig treated 234 Medicare patients in 2024, average age 74
CMS counts 234 Medicare patients who saw Dr. Feintzeig in 2024. The largest group is 65 to 74, with 87 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 35% are also on Medicaid. Their average risk score is 5.14, 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. Feintzeig's median patient age at 68, with 51% women.
Dr. Feintzeig's Medicare patients by age, 2024
Dr. Feintzeig's Medicare patients by sex, 2024
- Women9741%
- Men13759%
Chronic conditions among Dr. Feintzeig's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes59%
- Heart failure53%
- Ischemic heart disease53%
- Arthritis47%
- Atrial fibrillation38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Feintzeig'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
- Women51%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Irwin David Feintzeig wrote 517 Medicare Part D claims in 2024
In 2024, Dr. Feintzeig wrote 517 Medicare Part D claims for 99 patients. 78% of them were for generic drugs. CMS names the drug for 369 of them, across 13 drugs with 11 or more claims each, at $66,256 in total drug cost. In 2023, CMS named 499 claims across 15 drugs.
Dr. Feintzeig's Part D claims by kind of drug, 2024
- Generic404 claims78%
- Brand-name113 claims22%
Dr. Feintzeig'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4992024: 36926%
Drugs named by CMS: 13 in 2024, 15 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
Dr. Irwin David Feintzeig scored 21 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 21 out of 100 for Dr. Feintzeig for performance year 2024, reported individually.
Dr. Feintzeig's MIPS scores, performance year 2024
- 21of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 71of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Irwin David Feintzeig received $970 in industry payments from 2016 to 2024
CMS Open Payments shows 51 general payments to Dr. Feintzeig from 15 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 99% of the total. Relypsa, Inc. paid the most, $219.
General payments to Dr. Feintzeig by program year, 2016 to 2024
General payments to Dr. Feintzeig by kind, 2016 to 2024
- Food and beverage$96099%
- Education$101%
Companies that paid Dr. Feintzeig the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Irwin David Feintzeig graduated from University of Chicago Division of the Biological Sciences The Pritzker School of Medicine
Dr. Feintzeig graduated from University of Chicago Division of the Biological Sciences The Pritzker School of Medicine in 1979.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Irwin David Feintzeig'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 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 | Clinician Public Reporting: Overall MIPS Performance (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 Dr. Irwin David Feintzeig
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. Irwin David Feintzeig's NPI number?
Dr. Irwin David Feintzeig's NPI number is 1902805773. It was assigned on July 14, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Irwin David Feintzeig?
Dr. Irwin David Feintzeig is a nephrologist in Trumbull, Connecticut. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Irwin David Feintzeig practice?
Dr. Feintzeig practices at 7 Cambridge Dr, Trumbull, CT 06611. Dr. Feintzeig's primary practice is Milford Dialysis in Trumbull, Connecticut. Dmand AI also links Dr. Feintzeig to 1 group practice or clinic.
What is Dr. Irwin David Feintzeig's office phone number?
The practice phone on file for Dr. Feintzeig is (203) 301-9040.
What is Dr. Irwin David Feintzeig's medical license number?
Dr. Feintzeig holds Connecticut license 026343.
What medical group is Dr. Irwin David Feintzeig part of?
Dr. Feintzeig is linked to Nephrology Associates, P.C.
Does Dr. Irwin David Feintzeig accept Medicare?
Yes. CMS data shows Dr. Feintzeig billed Medicare for 542 services in 2024.
What is Dr. Irwin David Feintzeig's MIPS score?
Dr. Feintzeig's MIPS final score for performance year 2024 is 21 out of 100, reported individually.
How many Medicare patients does Dr. Irwin David Feintzeig see?
CMS counts 234 Medicare patients who saw Dr. Feintzeig in 2024, with an average age of 74.
What services does Dr. Irwin David Feintzeig bill to Medicare?
In 2024, Dr. Feintzeig's most billed Medicare services were hospital inpatient care (99232), dialysis (90960) and office visit, established patient (99214).
Show 4 more questionsShow fewer questions
Where did Dr. Irwin David Feintzeig go to medical school?
Dr. Feintzeig graduated from University of Chicago Division of the Biological Sciences The Pritzker School of Medicine in 1979.
What drugs does Dr. Irwin David Feintzeig prescribe most?
In 2024 Medicare Part D data, Dr. Feintzeig's most prescribed drugs by claims were Amlodipine Besylate, Jardiance and Losartan Potassium.
Has Dr. Irwin David Feintzeig received payments from drug or device companies?
CMS Open Payments shows $970 in general payments to Dr. Feintzeig from 15 companies from 2016 to 2024. The largest total came from Relypsa, Inc.
How long has Dr. Irwin David Feintzeig been practicing?
Dr. Feintzeig graduated from medical school in 1979, 47 years ago.
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