Margaret Sagsveen, D.O.

Primary specialty

Anesthesiology PhysicianTaxonomy code 207L00000X

License

310231-01 Issued in NY

Practice address

301 E Main St
Bay Shore, NY 11706-8408

Phone

(631) 885-3885

NPI assigned

Mar 20, 2017

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Other names 1

• Dr. Margaret Myones Former name

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: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Anesthesiology

Education

Other, 2017

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

North Shore - Lij Anesthesiology, PCGroup PAC ID 1153602453, 990 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• NS/Lij HS Southside Hospital Hospital, Bay Shore, NY, CCN 330043

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Networks

• Healthfirst Medicare Network H1722
• Healthfirst Medicare Network H5989
• Healthfirst Medicare Network H3359
• Healthfirst Medicare Network H9678

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.

• North Shore - Lij Anesthesiology, PC

  • Anesthesiology Physician
  • Chappaqua, NY
  • NPI 1417401266
  Medicare reassignment Care Compare group NPD
• Montefiore Medical Center

  • Anesthesiology Physician
  • Bronx, NY
  • NPI 1063525152
  Medicare reassignment NPD
• Montefiore Medical Center

  • Community/Retail Pharmacy
  • Bronx, NY
  • NPI 1194183715
  NPD

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

• South Shore University Hospital

  • General Acute Care Hospital
  • Bay Shore, NY
  • NPI 1457369381
  Care Compare affiliation

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

{
    "created_epoch": "1489968000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1764633600000",
    "number": "1073054375",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "301 E MAIN ST",
            "city": "BAY SHORE",
            "state": "NY",
            "postal_code": "117068408"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "301 E MAIN ST",
            "city": "BAY SHORE",
            "state": "NY",
            "postal_code": "117068408",
            "telephone_number": "631-885-3885"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "111 E 210th St",
            "address_purpose": "LOCATION",
            "city": "Bronx",
            "state": "NY",
            "postal_code": "104672401",
            "country_code": "US",
            "telephone_number": "718-920-2802",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SAGSVEEN",
        "first_name": "MARGARET",
        "name_prefix": "Dr.",
        "credential": "D.O.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2017-03-20",
        "last_updated": "2025-12-02",
        "certification_date": "2025-12-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "NY",
            "license": "310231-01",
            "primary": true
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "MARGARET",
            "last_name": "MYONES",
            "prefix": "DR.",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Elizabeth Safarian, PA-C
• Safe Shore Therapy LCSW, PLLC
• Susan Eileen Saffner, LCSW
• Sagamore Medical PLLC
• Annmarie Saggio, RN
• Dinnisa Saint-Fleur, PA-C
• Elizabeth Saitzyk
• Jensine Sajan
• Patricia Salami, RN
• Michelle Salas-Alberto, LMSW

• Anesthesiology Physician in Bay Shore, NY
• Providers in Bay Shore, NY by specialty
• Anesthesiology Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 2, 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.