Dianne Jean Defusco, MD
Internal Medicine Physician · North Haven, CT
Dianne Jean Defusco, MD is an internal medicine physician with a practice address in North Haven, Connecticut, and NPI 1063584787, issued on Nov 15, 2006. Check the license (Connecticut 041834, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Dianne Jean Defusco
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 041834 CT
Self-reported in NPPES; status is on the state search - Practice location
- 2 Broadway, North Haven, CT 06473
- Phone
- (203) 234-6500
- Enumerated
- Nov 15, 2006
- Record last updated
- Sep 14, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (203) 234-6503
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 2 Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Lorenzo Galante, MDInternal Medicine Physician1023180726
Verify Dianne Jean Defusco in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 041834Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% more Medicare Part D claims than the average internal medicine physician in 2024
4,293 Medicare Part D claims for 555 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 33 claims were for opioids.
Most prescribed
- Levothyroxine Sodium326 claims
- Rosuvastatin Calcium289 claims
- Atorvastatin Calcium267 claims
- Amlodipine Besylate203 claims
- Metformin Hcl138 claims
- Metoprolol Succinate104 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): 93.6 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: $46.04
2 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Dianne Jean Defusco among 2,623 internal medicine physician records in Connecticut
Dianne Jean Defusco, MD is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 52% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 internal medicine physician records list a practice address in North Haven
They are 14 of the 539 NPPES records with a practice address in North Haven, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in North Haven → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jennifer Dilungo, PA-CNorth Haven, CT 064731972649812
- John Fomeche, MDNorth Haven, CT 064731336886431
- Lorenzo Galante, MDNorth Haven, CT 064731023180726
- Jeffrey Gimbel, M.D.North Haven, CT 064731861436735
- Gidon Goldenberg, M.D.North Haven, CT 064731689619041
- Georgia Kelley, M.D.North Haven, CT 064731013945211
- Maida KhanNorth Haven, CT 064731972165751
- Eric Liben, MDNorth Haven, CT 064731336183888
Common questions
What is Dianne Jean Defusco, MD's NPI number?
Dianne Jean Defusco, MD's National Provider Identifier (NPI) is 1063584787, issued on Nov 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Dianne Jean Defusco, MD located?
The NPPES record lists a practice address at 2 Broadway, North Haven, CT, 06473. Phone: (203) 234-6500. Providers update this record themselves, so call before visiting.
How can I verify Dianne Jean Defusco, MD's license?
NPPES lists Connecticut license number 041834, 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 Dianne Jean Defusco, MD prescribe under Medicare Part D?
In 2024, Dianne Jean Defusco, MD had 4,293 Medicare Part D claims for 555 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Dianne Jean Defusco, MD's MIPS final score?
The 2023 MIPS final score is 93.6 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.