Daniel O'Brien

Primary specialty

Psychiatric/Mental Health Nurse PractitionerTaxonomy code 363LP0808X

License

RN2320615 Issued in MA

Practice address

316 Gifford St Ste 1
Falmouth, MA 02540-2962

Phone

(857) 328-0724

Fax

(949) 703-7789

NPI assigned

Apr 23, 2018

Sex

Male

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, 2023

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

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.

• Compass Circle Behavioral Health LLC

  • Psychiatric/Mental Health Registered Nurse
  • Falmouth, MA
  • NPI 1558189498
  Medicare reassignment NPD Authorized official
• Prospect Hill Consultants Inc.

  • Adult Psychiatric/Mental Health Clinical Nurse Specialist
  • Bourne, MA
  • NPI 1447496237
  NPD (past)

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

{
    "created_epoch": "1524441600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755734400000",
    "number": "1831687144",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "55 BEATTIE PL STE 810",
            "city": "GREENVILLE",
            "state": "SC",
            "postal_code": "296012191"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "316 GIFFORD ST STE 1",
            "city": "FALMOUTH",
            "state": "MA",
            "postal_code": "025402962",
            "telephone_number": "857-328-0724",
            "fax_number": "949-703-7789"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "DANIEL",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-04-23",
        "last_updated": "2025-08-21",
        "certification_date": "2025-08-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LP0808X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": "MA",
            "license": "RN2320615",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Michelle A Nickerson, MSW
• Aron Randall Nigh, PA-C
• John W Nolan, PA
• William Sylvester Noonan
• Mohammad Nourmohammadi, M.D.
• Kimberly O'Brien
• Emily O'Connell, M.D.
• Michael James O'Connell, D.O
• Donald Edmond O'Malley, M.D.
• Michael T O'Malley

• Psychiatric/Mental Health Nurse Practitioner in Falmouth, MA
• Providers in Falmouth, MA by specialty
• Psychiatric/Mental Health Nurse Practitioner in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 21, 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.