Registry data as of Aug 27, 2026

Mark Ostrowski, PSY.D.

Clinical Psychologist · Stamford, CT

Mark Ostrowski, PSY.D. is a clinical psychologist with a practice address in Stamford, Connecticut, and NPI 1700022324, issued on Jan 2, 2009. Check the license with the Connecticut board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, loaded Aug 27, 2026 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1700022324
Name
Mark Ostrowski
Credential
PSY.D.
Primary taxonomy
Clinical Psychologist 103TC0700X
Practice location
999 Summer St, Stamford, CT 06905
Phone
(203) 967-4995
Enumerated
Jan 2, 2009
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 999 Summer St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Patrick Cahill, D.O.Obstetrics & Gynecology Physician1134229909
  2. Mary Coppolo, APRNFamily Nurse Practitioner1750815098
  3. W Crouch, LCSWClinical Social Worker1609802651
  4. Brittany FinchSpecialist1245420900
  5. Peter Gardell, DDSDentist1639297930
  6. Joseph Grabicki, D.P.T.Specialist1760515092

Verify Mark Ostrowski in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Connecticut board licenses this professionCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Find the Connecticut license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Clinical Psychologist providers in Connecticut

There are 1,026 clinical psychologist records in Connecticut. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,026 in Connecticut → Every provider in Stamford →

Other clinical psychologist records in Connecticut

  1. Elizabeth AaronOld Greenwich, CT1124909981
  2. Deborah Abbott, PH.D.Guilford, CT1023223450
  3. Gina Abbott, PHDCheshire, CT1033402086
  4. William Abbott, PSY.DNorth Haven, CT1295991024
  5. Erica Abel, PH.D.West Haven, CT1982971222
  6. Jenna Adamowicz, PH.D.West Haven, CT1356271266
  7. Erin Adams, PSY.D..Westport, CT1760521728
  8. Lynette Adams, PH,D.West Haven, CT1346545472
  9. Patricia Adams, PH.DHartford, CT1336352004
  10. Michelle Albright, PHDWestport, CT1134525173

Common questions

What is Mark Ostrowski, PSY.D.'s NPI number?

Mark Ostrowski, PSY.D.'s National Provider Identifier (NPI) is 1700022324, issued on Jan 2, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Mark Ostrowski, PSY.D. located?

The NPPES record lists a practice address at 999 Summer St, Stamford, CT, 06905. Phone: (203) 967-4995. Providers update this record themselves, so call before visiting.

How can I verify Mark Ostrowski, PSY.D.'s license?

Search the Connecticut board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.