Irwin David Feintzeig, M.D.
Nephrology Physician · Trumbull, CT
Irwin David Feintzeig, M.D. is a nephrology physician with a practice address in Trumbull, Connecticut, and NPI 1902805773, issued on Jul 14, 2005. Check the license (Connecticut 026343, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Irwin David Feintzeig
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 026343 CT
Self-reported in NPPES; status is on the state search - Practice location
- 7 Cambridge Dr Ste 201, Trumbull, CT 06611
- Phone
- (203) 335-0195
- Enumerated
- Jul 14, 2005
- Record last updated
- May 13, 2024
- Fax
- (203) 335-7293
- Medicaid ID
- 001263433 CT
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 167 in Connecticut → Look up another NPI →
Also registered at 7 Cambridge Dr Ste 201
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Bennett, MDNephrology Physician1326337940
- Karolina Bucci, APRNFamily Nurse Practitioner1629624564
- Mahalia Dejesus, FNP-BCFamily Nurse Practitioner1578512323
- Aaron Dommu, M.D.Nephrology Physician1548437148
- James Gavin, M.D.Nephrology Physician1609875491
- Rachel Heggland, APRN FNP-BCFamily Nurse Practitioner1316322696
Verify Irwin David Feintzeig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 026343Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average nephrology physician in 2024
517 Medicare Part D claims for 99 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Amlodipine Besylate64 claims
- Jardiance58 claims
- Losartan Potassium53 claims
- Calcitriol52 claims
- Lisinopril24 claims
- Farxiga20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 10.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $27.89
1 payment: food and beverage; the largest payer was Otsuka America Pharmaceutical, Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Irwin David Feintzeig among 167 nephrology physician records in Connecticut
Irwin David Feintzeig, M.D. is one of 167 nephrology physician records with a practice address in Connecticut. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 70% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2024 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Connecticut
There are 167 nephrology physician records in Connecticut.
All 167 in Connecticut → Every provider in Trumbull → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- David Bennett, MDTrumbull, CT 066111326337940
- Aaron Dommu, M.D.Trumbull, CT 066111548437148
- James Gavin, M.D.Trumbull, CT 066111609875491
- William Hunt, MDTrumbull, CT 066111396744041
- Robert Kim, M.D.Trumbull, CT 066111396737870
- Sylvia Wu, MDTrumbull, CT 066111467958249
- Milagros Yunes, MDTrumbull, CT 066111295117810
- Sally Lee, M.D.Stratford, CT 066141447221189
Common questions
What is Irwin David Feintzeig, M.D.'s NPI number?
Irwin David Feintzeig, M.D.'s National Provider Identifier (NPI) is 1902805773, issued on Jul 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Irwin David Feintzeig, M.D. located?
The NPPES record lists a practice address at 7 Cambridge Dr Ste 201, Trumbull, CT, 06611. Phone: (203) 335-0195. Providers update this record themselves, so call before visiting.
How can I verify Irwin David Feintzeig, M.D.'s license?
NPPES lists Connecticut license number 026343, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Irwin David Feintzeig, M.D. prescribe under Medicare Part D?
In 2024, Irwin David Feintzeig, M.D. had 517 Medicare Part D claims for 99 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Irwin David Feintzeig, M.D.'s MIPS final score?
The 2023 MIPS final score is 10.2 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.