Christopher Michael Brennan, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

277549 Issued in NY

Practice address

1000 Montauk Highway
Hospitalist Department 3Rd Floor
West Islip, NY 11795

Phone

(631) 376-3610

NPI assigned

Aug 29, 2008

Last updated

May 19, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in RI, NY2 enrollments

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 2

Specialty

HospitalistAlso: Internal Medicine

Education

Other, 2007

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Southwest Suffolk Medical PCGroup PAC ID 0244396349, 204 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Good Samaritan Hospital Medical Center Hospital, West Islip, NY, CCN 330286

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

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

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.

• Southwest Suffolk Medical, P.C.

  • Surgical Oncology Physician
  • Smithtown, NY
  • NPI 1104096049
  Medicare reassignment Care Compare group NPD
• Prospect Chartercare RWMC, LLC

  dba Roger Williams Medical Center

  • Internal Medicine Physician
  • Providence, RI
  • NPI 1285059287
  Medicare reassignment NPD
• Southwest Suffolk Medical PC

  dba Samaritan Primary Care

  • Family Medicine Physician
  • Lindenhurst, NY
  • NPI 1770919763
  NPD
• Prospect Chartercare RWMC, LLC

  dba Roger Williams Medical Center

  • Cardiovascular Disease Physician
  • Providence, RI
  • NPI 1326463548
  NPD
• Good Samaritan Hospital Medical Center

  • General Acute Care Hospital
  • West Islip, NY
  • NPI 1902865355
  NPD (past)

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

• Good Samaritan Hospital Medical Center

  • General Acute Care Hospital
  • West Islip, NY
  • NPI 1902865355
  Care Compare affiliation

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

{
    "created_epoch": "1219968000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1747612800000",
    "number": "1174771323",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1000 MONTAUK HIGHWAY",
            "address_2": "HOSPITALIST OFFICE",
            "city": "WEST ISLIP",
            "state": "NY",
            "postal_code": "11795",
            "telephone_number": "631-376-3610"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1000 MONTAUK HIGHWAY",
            "address_2": "HOSPITALIST DEPARTMENT 3RD FLOOR",
            "city": "WEST ISLIP",
            "state": "NY",
            "postal_code": "11795",
            "telephone_number": "631-376-3610"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BRENNAN",
        "first_name": "CHRISTOPHER",
        "middle_name": "MICHAEL",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2008-08-29",
        "last_updated": "2025-05-19",
        "certification_date": "2025-05-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "RI",
            "license": "MD13459",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "246004",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "277549",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Anna Brady
• Brain Care Long Island PLLC
• Robert Matthew Bramante, MD
• Stephanie Dawn Teresa Brassil, AGNP
• Jillian Rose Brauer-Lum, PA-C
• Sarah Anne Brennan, FNP
• Ashley Brooke Brethel
• Brian J McHugh MD PC
• Firas Bridges, MD
• Susan Brite

• Internal Medicine Physician in West Islip, NY
• Providers in West Islip, NY by specialty
• Internal Medicine Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 19, 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.