Nnennaya Duke, DO
Family Medicine Physician · Waterbury, CT
Nnennaya Duke, DO is a family medicine physician with a practice address in Waterbury, Connecticut, and NPI 1992144190, issued on Jun 20, 2013. Check the license (Connecticut 55380, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Nnennaya Duke
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 55380 CT
Self-reported in NPPES; status is on the state search - Practice location
- 51 N Elm St, Waterbury, CT 06702
- Phone
- (203) 574-4000
- Enumerated
- Jun 20, 2013
- Record last updated
- Jul 20, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (203) 574-4003
- Medicare enrollment
- Enrolled (PECOS I20201110002015); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 958 in Connecticut → Look up another NPI →
Also registered at 51 N Elm St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Angelica Camargo, LCSWClinical Social Worker1073149431
- Whitney Cox, LCSWClinical Social Worker1023673837
Verify Nnennaya Duke in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 55380Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average family medicine physician in 2024
2,838 Medicare Part D claims for 496 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 28 claims were for opioids.
Most prescribed
- Metformin Hcl103 claims
- Rosuvastatin Calcium89 claims
- Atorvastatin Calcium87 claims
- Levocetirizine Dihydrochloride83 claims
- Losartan Potassium74 claims
- Diclofenac Sodium68 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.
Industry payments in 2024: $545.48
23 payments; by number, the most common kind was food and beverage; the largest payer was Corcept Therapeutics. The 55,478 providers of this specialty with any payment received $902.55 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.
Bills Medicare through 2 group practices
- Afc Physicians OF Connecticut PCDanbury, CT
- United Community And Family Services, IncNorwich, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nnennaya Duke among 958 family medicine physician records in Connecticut
Nnennaya Duke, DO is one of 958 family medicine physician records with a practice address in Connecticut. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 65% of them.
- NPI issued2013 · 65% of these records are older, 33% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2013 · median 2009 among the 611 with a school on file
- Record last updated2016 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in Connecticut
There are 958 family medicine physician records in Connecticut.
All 958 in Connecticut → Every provider in Waterbury → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Xi TengWaterbury, CT 067021619407780
- Yanira PachecoWaterbury, CT 067041881518710
- Diane Miller, M.D.Waterbury, CT 067051144270588
- George Barth, M.D.Waterbury, CT 067061831200187
- Anna Timell, M.D.Waterbury, CT 067061013929769
- Yocheved Milstein, APRNWaterbury, CT 067101285342071
- Brittany Andreoli, DOProspect, CT 067121841750346
- Karl Genovese, MDProspect, CT 067121396275244
Common questions
What is Nnennaya Duke, DO's NPI number?
Nnennaya Duke, DO's National Provider Identifier (NPI) is 1992144190, issued on Jun 20, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Nnennaya Duke, DO located?
The NPPES record lists a practice address at 51 N Elm St, Waterbury, CT, 06702. Phone: (203) 574-4000. Providers update this record themselves, so call before visiting.
How can I verify Nnennaya Duke, DO's license?
NPPES lists Connecticut license number 55380, 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 Nnennaya Duke, DO prescribe under Medicare Part D?
In 2024, Nnennaya Duke, DO had 2,838 Medicare Part D claims for 496 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
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.