NPIMap

Individual provider Active NPI

Francis J Obrien, MD

  • Cardiovascular Disease Physician
  • New York, NY
National Provider Identifier
1336148717
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Cardiovascular Disease PhysicianTaxonomy code 207RC0000X
License
157747 Issued in NY
Practice address
317 E 34TH St
New York, NY 10016-4974
Phone
(212) 726-7457
Fax
(212) 209-3257
NPI assigned
Jul 19, 2005
Last updated
Jul 13, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Cardiovascular Disease Physician 207RC0000X 157747 NY Primary

Addresses

Primary practice location

317 E 34TH St
New York, NY 10016-4974

Mailing address

317 E 34TH St
New York, NY 10016-4974
Phone (212) 726-7457

Other identifiers 1

IdentifierTypeStateIssuer
01091092MedicaidNY

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NY
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20040423000178 NY Practitioner - Cardiovascular Disease (Cardiology)Practitioner - Internal Medicine 5597751669 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Cardiovascular Disease (Cardiology)Also: Internal Medicine
Education
Harvard Medical School, 1982
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Optum Medical Care PCGroup PAC ID 9931013240, 1,013 clinicians

Practice addresses (Care Compare)

317 E 34TH St
New York, NY 10016-4974
Phone (212) 726-7400

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
157747NYMDCardiovascular Disease Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Optum Medical Care, P.C. CurrentSince Jan 1, 2019 Accepting new patients
Optum Medical Care, P.C. Cardiovascular Disease CurrentSince Jan 1, 2019 Accepting new patients
NYU Nuclear Cardiology Associates Cardiovascular Disease PastSince Jul 1, 2007 Accepting new patients
New York University Cardiovascular Disease Past Accepting new patients

Locations

110 S Bedford Rd
Mount Kisco, NY 10549
Phone (763) 910-9192

90 S Bedford Rd
Mount Kisco, NY 10549
Phone (914) 242-1050

317 E 34th St
New York, NY 10016
Phone (212) 263-9741

317 E 34th St
Fl 9
New York, NY 10016
Phone (212) 726-7400

Philadelphia, PA 19195

Interoperability endpoints

  • Direct secure messaging: fobrien141354@direct.optum.com
  • Direct secure messaging: fobrien680265@nychhc.direct-ci.com

Organizations & group practices 4

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

Hospital & facility affiliations 9

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

NPI Registry JSON

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

{
    "created_epoch": "1121731200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1336148717",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "317 E 34TH ST",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100164974",
            "telephone_number": "212-726-7457",
            "fax_number": "212-209-3257"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "317 E 34TH ST",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100164974",
            "telephone_number": "212-726-7457",
            "fax_number": "212-209-3257"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OBRIEN",
        "first_name": "FRANCIS",
        "middle_name": "J",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-07-19",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "NY",
            "license": "157747",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "01091092",
            "state": "NY"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in New York, NY

Sources for this page

Verify at the official NPI Registry.