Callie O'Brien, NP

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

RN2294535 Issued in MA

Practice address

75 Francis St
Boston, MA 02115-6106

Phone

(617) 732-5500

NPI assigned

Jul 29, 2019

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 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, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Dana-Farber Cancer Institute, Inc.Group PAC ID 9133038904, 671 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Brigham and Women'S Hospital Hospital, Boston, MA, CCN 220110
• Dana-Farber Cancer Institute Hospital, Boston, MA, CCN 220162

Merit-based Incentive Payment System (MIPS)

Final score

84.06 of 100Reported as group

Quality

65.04

Promoting interoperability

100

Improvement activities

40

Cost

69.14

Medicare enrollment (NPD)

Enrolled

Credentials

Certified Nurse Practitioner, Nurse Practitioner

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: siegert.callie.bwh@direct.partners.masshiway.net

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.

• Dana-Farber Cancer Institute, Inc.

  • Special Hospital
  • Boston, MA
  • NPI 1346433257
  Medicare reassignment Care Compare group NPD
• Brigham and Women'S Hospital

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1093885816
  NPD
• Dana-Farber Cancer Institute, Inc.

  • Durable Medical Equipment & Medical Supplies
  • Chestnut Hill, MA
  • NPI 1497429237
  NPD

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

• Brigham & Womens Hospital, Inc.

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1790717650
  Care Compare affiliation
• Dana-Farber Cancer Institute, Inc.

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1851333686
  Care Compare affiliation

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

{
    "created_epoch": "1564358400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784073600000",
    "number": "1407400393",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "75 FRANCIS ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021156106",
            "telephone_number": "617-732-5500"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "75 FRANCIS ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021156106",
            "telephone_number": "617-732-5500"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "450 Brookline Ave",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "022155418",
            "country_code": "US",
            "telephone_number": "617-632-3000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "CALLIE",
        "credential": "NP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2019-07-29",
        "last_updated": "2026-07-15",
        "certification_date": "2026-07-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "MA",
            "license": "RN2294535",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Anne Teresa O'Brien, PT
• Anne-Marie O'Brien, N.P.
• Ashley O'Brien, RD, LDN
• Ashley Marie O'Brien, PT, DPT
• Caleigh Marie O'Brien, PT, DPT
• Caroline Daniels O'Brien, NP
• Devon O'Brien, MSW, LICSW
• Elizabeth Ann O'Brien, RN, CRNA
• Emma O'Brien
• Eva Louise O'Brien, MD

• Nurse Practitioner in Boston, MA
• Providers in Boston, MA by specialty
• Nurse Practitioner in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 15, 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.