Katie Brouillard O'Brien, NP

Primary specialty

Dermatology PhysicianTaxonomy code 207N00000X

License

284603 Issued in MA

Practice address

255 Park Ave Ste 509
Worcester, MA 01609-1989

Phone

(508) 890-5500

Fax

(508) 890-5505

NPI assigned

Oct 21, 2008

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in MA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

Other, 2008

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Integrated Dermatology of Worcester II LLCGroup PAC ID 0042616153, 2 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

0 of 100Reported as individual

Quality

0

Improvement activities

0

Cost

0

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: kobrien@directaddress.net
• Direct secure messaging: kobrien@apderm.emadirect.md

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.

• Integrated Dermatology of Worcester II LLC

  • Dermatology Physician
  • Worcester, MA
  • NPI 1659046340
  Medicare reassignment Care Compare group NPD

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

{
    "created_epoch": "1224547200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769385600000",
    "number": "1801048921",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "36 ADAMS STREET",
            "city": "QUINCY",
            "state": "MA",
            "postal_code": "02169",
            "telephone_number": "617-773-0711",
            "fax_number": "617-376-2271"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "255 PARK AVE STE 509",
            "city": "WORCESTER",
            "state": "MA",
            "postal_code": "016091989",
            "telephone_number": "508-890-5500",
            "fax_number": "508-890-5505"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "KATIE",
        "middle_name": "BROUILLARD",
        "credential": "NP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2008-10-21",
        "last_updated": "2026-01-26",
        "certification_date": "2026-01-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "MA",
            "license": "284603",
            "primary": false
        },
        {
            "code": "207N00000X",
            "taxonomy_group": "",
            "desc": "Dermatology",
            "state": "MA",
            "license": "284603",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jessica O'Brien, RN
• Jolene O'Brien
• Juliette O'Brien
• Katherine Helen O'Brien, M.S.W., L.I.C.S.W.,
• Kathleen O'Brien, LMHC
• Kaylee R O'Brien
• Kaylin O'Brien, MS, GC
• Lauren Jane O'Brien, PA
• Maryellen O'Brien, LMHC
• Sarah O'Brien, FNP

• Dermatology Physician in Worcester, MA
• Providers in Worcester, MA by specialty
• Dermatology Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 26, 2026; 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.