Katherine Marie Vaillancourt, MD

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

75322 Issued in CT

Practice address

1351 Washington Blvd
Stamford, CT 06902-2419

Phone

(203) 621-3700

Fax

(203) 621-3711

NPI assigned

Apr 6, 2020

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in CT

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Family Practice

Education

Other, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Stamford Health Medical Group IncGroup PAC ID 6901099746, 442 clinicians

Optimus Health Care IncGroup PAC ID 9335051580, 79 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Stamford Hospital Hospital, Stamford, CT, CCN 070006

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: kvaillancourt24760@stamfordhealth.direct-ci.com
• Direct secure messaging: kvaillancourt441088@direct.ynhh.org
• FHIR API: https://fhir4.healow.com/fhir/r4/ABCIBA

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Optimus Health Care Inc

  • Federally Qualified Health Center (FQHC)
  • Bridgeport, CT
  • NPI 1669445946
  Medicare reassignment Care Compare group NPD
• Stamford Health Medical Group Inc

  • General Practice Physician
  • Stamford, CT
  • NPI 1154633980

  Family Medicine

  Medicare reassignment Care Compare group NPD
• Optimus Health Care Inc

  dba Woodland Health and Wellness Center

  • Federally Qualified Health Center (FQHC)
  • Stamford, CT
  • NPI 1164798138
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Stamford Hospital

  • General Acute Care Hospital
  • Stamford, CT
  • NPI 1356331425
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1586131200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1754006400000",
    "number": "1770112260",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1351 WASHINGTON BLVD",
            "city": "STAMFORD",
            "state": "CT",
            "postal_code": "069022419",
            "telephone_number": "203-621-3700",
            "fax_number": "203-621-3711"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1351 WASHINGTON BLVD",
            "city": "STAMFORD",
            "state": "CT",
            "postal_code": "069022419",
            "telephone_number": "203-621-3700",
            "fax_number": "203-621-3711"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "VAILLANCOURT",
        "first_name": "KATHERINE",
        "middle_name": "MARIE",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2020-04-06",
        "last_updated": "2025-08-01",
        "certification_date": "2025-08-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CT",
            "license": "75322",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Urogynecology and Pelvic Sur
• USA Vascular Center of Connecticut PLLC
• USA Vein Clinics of Connecticut PLLC
• Utopia Companion
• Shira B Vadel, MD
• Justine Valentino
• Valeriemondesirlmft LLC
• Alexandra Van Duyne, BCBA
• Jaclyn Olivia Vanacore, LCSW
• Corinne Vanbeek, MD

• Family Medicine Physician in Stamford, CT
• Providers in Stamford, CT by specialty
• Family Medicine Physician in Connecticut

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 1, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.