Nicholas Dainiak, M.D.
Internal Medicine Physician · Bridgeport, CT
Nicholas Dainiak, M.D. is an internal medicine physician with a practice address in Bridgeport, Connecticut, and NPI 1396713467, issued on Mar 14, 2006. Check the license (Connecticut 017830, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Nicholas Dainiak
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 017830 CT
Self-reported in NPPES; status is on the state search - Practice location
- 226 Mill Hill Ave, Bridgeport, CT 06610
- Phone
- (203) 384-3873
- Enumerated
- Mar 14, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (203) 384-3829
- Medicare enrollment
- Enrolled (PECOS I20100504000862); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 1973
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 226 Mill Hill Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Stephanie Albino, OTR/LPediatric Occupational Therapist1255505426
- Abigail Alvarez-Quiles, LCSWClinical Social Worker1639763980
- Frederick Apiado, M.D.Internal Medicine Physician1225211097
- Vivian ArgentoInternal Medicine Physician1285684720
Verify Nicholas Dainiak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 017830Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
123 Medicare Part D claims for 30 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 43% of claims.
Most prescribed
- Warfarin Sodium34 claims
- Eliquis25 claims
- Dabigatran Etexilate13 claims
- Xarelto11 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 practice group's MIPS final score for 2023 (Medicare payment program): 86.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $83,000.00
3 payments; by number, the most common kind was consulting fee; the largest payer was Partner Therapeutics, 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.
One hospital affiliation
- Hartford HospitalHartford, CT · Acute Care Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Nicholas Dainiak among 2,623 internal medicine physician records in Connecticut
Nicholas Dainiak, M.D. 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 fileYes · 63% of these records are
- Graduated1973 · median 2004 among the 1,646 with a school on file
- Record last updated2026 · 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).
130 internal medicine physician records list a practice address in Bridgeport
They are 130 of the 2,980 NPPES records with a practice address in Bridgeport, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Bridgeport → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Yaw Adjepong, MDBridgeport, CT 066101831168996
- Frederick Apiado, M.D.Bridgeport, CT 066101225211097
- Vivian ArgentoBridgeport, CT 066101285684720
- Freda Boateng, M.D.Bridgeport, CT 066101386832848
- Doru Bordea, M.D.Bridgeport, CT 066101912945429
- Angelapia Degirolamo, M.D.Bridgeport, CT 066101023087996
- Warren Heller, M.D.Bridgeport, CT 066101578529228
- Karen Hutchinson, M.D.Bridgeport, CT 066101013986363
Common questions
What is Nicholas Dainiak, M.D.'s NPI number?
Nicholas Dainiak, M.D.'s National Provider Identifier (NPI) is 1396713467, issued on Mar 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nicholas Dainiak, M.D. located?
The NPPES record lists a practice address at 226 Mill Hill Ave, Bridgeport, CT, 06610. Phone: (203) 384-3873. Providers update this record themselves, so call before visiting.
How can I verify Nicholas Dainiak, M.D.'s license?
NPPES lists Connecticut license number 017830, 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 Nicholas Dainiak, M.D. prescribe under Medicare Part D?
In 2024, Nicholas Dainiak, M.D. had 123 Medicare Part D claims for 30 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Nicholas Dainiak, M.D.'s MIPS final score?
The 2023 MIPS final score is 86.4 of 100, reported for the practice group. 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.