Mikayla O'Brien, PA

Primary specialty

Physician AssistantTaxonomy code 363A00000X

Practice address

159 E 74TH St
New York, NY 10021-3235

Phone

(212) 737-3301

NPI assigned

Feb 18, 2025

Sex

Female

Sole proprietor

Yes

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 NY

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

Physician Assistant

Education

Other, 2024

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Stephen J Nicholas MD PCGroup PAC ID 0446264931, 28 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Lenox Hill Hospital Hospital, New York, NY, CCN 330119

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mikayla.o.brien.1@11998.direct.athenahealth.com
• Direct secure messaging: mobrien316188@northwell.direct-ci.com

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.

• Stephen J Nicholas MD PC

  • Orthopaedic Surgery Physician
  • New York, NY
  • NPI 1316933872
  Medicare reassignment Care Compare group NPD
• Stephen J Nicholas MD PC

  • Durable Medical Equipment & Medical Supplies
  • Scarsdale, NY
  • NPI 1093517393
  NPD

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

• Lenox Hill Hospital

  • General Acute Care Hospital
  • New York, NY
  • NPI 1477616571
  Care Compare affiliation

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

{
    "created_epoch": "1739836800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1739836800000",
    "number": "1053116434",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 581",
            "city": "POINT LOOKOUT",
            "state": "NY",
            "postal_code": "115690581",
            "telephone_number": "516-761-2249"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "159 E 74TH ST",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100213235",
            "telephone_number": "212-737-3301"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1600 Stewart Ave",
            "address_purpose": "LOCATION",
            "city": "Westbury",
            "state": "NY",
            "postal_code": "115906696",
            "country_code": "US",
            "telephone_number": "516-243-8506",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2 Overhill Rd",
            "address_purpose": "LOCATION",
            "city": "Scarsdale",
            "state": "NY",
            "postal_code": "105835323",
            "country_code": "US",
            "telephone_number": "914-725-6970",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "MIKAYLA",
        "credential": "PA",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2025-02-18",
        "last_updated": "2025-02-18",
        "certification_date": "2025-02-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "NY",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mark Edward O'Brien
• Mary O'Brien, LCSW, CASAC
• Megan O'Brien
• Melissa O'Brien, NP
• Michelle Esther O'Brien, PHD, LCSW
• Molly Kathleen O'Brien, MD
• Monica O'Brien, NP
• Nicole Grace O'Brien, RD
• Robert J O'Brien III, PA-C
• Sarah Yvonne O'Brien

• Physician Assistant in New York, NY
• Providers in New York, NY by specialty
• Physician Assistant in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 18, 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.