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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

NICHOLAS DAINIAK M.D.
NPI 1396713467
Internal Medicine in Bridgeport, CT

Active since March 14, 2006PECOS Enrolled
86.41/100
CMS Quality Rating
226 MILL HILL AVE, 3RD FLOOR, BRIDGEPORT, CT 06610(203) 384-3873(203) 384-3829 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About Nicholas Dainiak M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

NICHOLAS DAINIAK M.D. (NPI 1396713467) is an individual internal medicine provider in Bridgeport, Connecticut, licensed in Connecticut (017830) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (1973).

NPPES Registry Identity

NPI1396713467
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameNICHOLAS DAINIAKCredential: M.D.
Location Address226 MILL HILL AVE, 3RD FLOORBridgeport, CT 06610-2811
Mailing AddressPo Box 5246Bridgeport, CT 06610-0246 · (203) 384-3873 · Fax (203) 384-3829
Phone(203) 384-3873
Fax(203) 384-3829
Sole ProprietorNo
Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 1973
Enumeration DateMarch 14, 2006
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1396713467 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CT · 017830
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedInternal Medicine · HematologyTaxonomy 207RH0000X · License 017830 (CT)
226 MILL HILL AVE, Bridgeport, CT 06610
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Nicholas Dainiak M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7214065762
PECOS Enrollment IDI20100504000862
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
77 services40 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06610 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

86.41/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality81.99
Promoting Interoperability100
Improvement Activities40
Cost43.03

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KAREN A HUTCHINSON M.D.
Internal Medicine
226 MILL HILL AVE, 3RD FLOOR
BRIDGEPORT, CT 06610
Greater Bridgeport Planning Region (203) 384-3873
ANGELAPIA DEGIROLAMO M.D.
Internal Medicine
226 MILL HILL AVE, 3RD FLOOR
BRIDGEPORT, CT 06610
Greater Bridgeport Planning Region (203) 384-3873
RAJ KUMARI BANSAL MD
Psychiatry & Neurology (Addiction Psychiatry)
226 MILL HILL AVE, 3RD FLOOR
BRIDGEPORT, CT 06610
Greater Bridgeport Planning Region (203) 384-3873
JOANNA ZOLKOWSKI-WYNNE M.D.
Pediatrics
226 MILL HILL AVE, 3RD FLOOR
BRIDGEPORT, CT 06610
Greater Bridgeport Planning Region (203) 384-3873
GARY E KLEINMAN M.D.
Obstetrics & Gynecology
226 MILL HILL AVE, 3RD FLOOR
BRIDGEPORT, CT 06610
Greater Bridgeport Planning Region (203) 384-3873
SADIE SNOW
Nurse Practitioner
226 MILL HILL AVE
BRIDGEPORT, CT 06610
Greater Bridgeport Planning Region (203) 384-3233
MS. PATRICIA ANN O'NEILL APRN
Nurse Practitioner (Adult Health)
226 MILL HILL AVE, 3RD FLOOR
BRIDGEPORT, CT 06610
Greater Bridgeport Planning Region (203) 384-3394
ELENI CHRISTINA KAUFMAN
Physical Therapy Assistant
226 MILL HILL AVE
BRIDGEPORT, CT 06610
Greater Bridgeport Planning Region (203) 336-7301

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Nicholas Dainiak's NPI number?

The NPI number for Nicholas Dainiak is 1396713467. It was assigned to this individual provider in the NPPES registry on March 14, 2006.

Where is Nicholas Dainiak located?

Nicholas Dainiak practices at 226 Mill Hill Ave 3rd Floor, Bridgeport, CT 06610. The listed phone number is (203) 384-3873.

What is Nicholas Dainiak's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Nicholas Dainiak enrolled in Medicare?

Yes. Nicholas Dainiak is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Nicholas Dainiak was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.