Katarzyna Mariak
Social Worker · New Haven, CT
Katarzyna Mariak is a social worker with a practice address in New Haven, Connecticut, and NPI 1366114126, issued on Sep 30, 2021. Check the license (Connecticut 4585, as entered in NPPES) with the Connecticut board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katarzyna Mariak
- Primary taxonomy
- Social Worker 104100000X
- License number
- 4585 CT
Self-reported in NPPES; status is on the state search - Practice location
- 400 Columbus Ave, New Haven, CT 06519
- Phone
- (203) 503-3000
- Enumerated
- Sep 30, 2021
- Record last updated
- Sep 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20220104002711); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest social worker records → All 2,124 in Connecticut → Look up another NPI →
Also registered at 400 Columbus Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mini AbrahamPharmacist1326497405
- Lissette Agosto, MSWSocial Worker1912257221
- Maysa AkbarPsychologist1720056864
- Sarah Ardito, LCSWClinical Social Worker1548610827
- Jenifer Baldwin, LCSWCounselor1508168691
- Nicole Beall, LPCProfessional Counselor1043615818
Verify Katarzyna Mariak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license 4585Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 2 group practices
- Cornell Scott Hill Health CorporationNew Haven, CT
- South-West Community Health Center IncBridgeport, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katarzyna Mariak among 2,124 social worker records in Connecticut
Katarzyna Mariak is one of 2,124 social worker records with a practice address in Connecticut. 7% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 48% of them.
- NPI issued2021 · 48% of these records are older, 46% newer
- In a Medicare fileYes · 7% of these records are
- In the CMS Doctors and Clinicians fileYes · 10% of these records are
- Graduated2018 · median 2017 among the 221 with a school on file
- Record last updated2021 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 104100000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
123 social worker records list a practice address in New Haven
They are 123 of the 9,793 NPPES records with a practice address in New Haven, and 2,124 social worker records in Connecticut.
All 2,124 in Connecticut → Every provider in New Haven → Social Worker nationwide →
The 8 social worker records with the nearest ZIP codes
- Karyn Bailey, LCSWNew Haven, CT 065191669651568
- Su-Lin CarbonelliNew Haven, CT 065191942390703
- Diane CasalainaNew Haven, CT 065191659588499
- Diane Dodge, LCSWNew Haven, CT 065191588732069
- Laura EwingNew Haven, CT 065191790828150
- Sarah Fitzpatrick, LCSWNew Haven, CT 065191033190616
- Dorothy Greenfeld, LCSWNew Haven, CT 065191396772547
- Steven Marans, MDNew Haven, CT 065191790870277
Common questions
What is Katarzyna Mariak's NPI number?
Katarzyna Mariak's National Provider Identifier (NPI) is 1366114126, issued on Sep 30, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Katarzyna Mariak located?
The NPPES record lists a practice address at 400 Columbus Ave, New Haven, CT, 06519. Phone: (203) 503-3000. Providers update this record themselves, so call before visiting.
How can I verify Katarzyna Mariak's license?
NPPES lists Connecticut license number 4585, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity 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.