Chelsey Ryan Malhas, MD

Primary specialty

Pulmonary Disease PhysicianTaxonomy code 207RP1001X

License

327297 Issued in NY

Practice address

50 New York Ave # 25a
Smithtown, NY 11787-3448

Phone

(631) 862-3000

NPI assigned

Apr 10, 2020

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

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: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Internal Medicine

Education

Other, 2020

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

• St Catherine of Siena Hospital Hospital, Smithtown, NY, CCN 330401

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Networks

• Healthfirst Medicare Network H1722
• Healthfirst Medicare Network H3359
• Healthfirst Medicare Network H5989
• 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.

• Southwest Suffolk Medical, P.C.

  • Surgical Oncology Physician
  • Smithtown, NY
  • NPI 1104096049
  Medicare reassignment Care Compare group NPD
• Southwest Suffolk Medical PC

  • Family Medicine Physician
  • Lindenhurst, NY
  • NPI 1770919763
  NPD

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

• St. Catherine of Siena Medical Center

  • General Acute Care Hospital
  • Smithtown, NY
  • NPI 1982663423
  Care Compare affiliation

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

{
    "created_epoch": "1586476800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782345600000",
    "number": "1730708694",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "50 NEW YORK AVE # 25A",
            "city": "SMITHTOWN",
            "state": "NY",
            "postal_code": "117873448",
            "telephone_number": "631-862-3000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "50 NEW YORK AVE # 25A",
            "city": "SMITHTOWN",
            "state": "NY",
            "postal_code": "117873448",
            "telephone_number": "631-862-3000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MALHAS",
        "first_name": "CHELSEY",
        "middle_name": "RYAN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2020-04-10",
        "last_updated": "2026-06-25",
        "certification_date": "2026-06-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Critical Care Medicine",
            "state": "NY",
            "license": "327297",
            "primary": false
        },
        {
            "code": "207RP1001X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Pulmonary Disease",
            "state": "NY",
            "license": "327297",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kelley A Mahoney, RN
• Christie Leigh Maier, M.A
• Andrew Makrides, M.D.
• Taylor Malefato
• Audra Marie Malerba, D.O.
• Abhay Malhotra, M.D.
• Maureen Ann Malone, ANP-C
• Caitlin Anne Mancuso, MS, CCC-SLP
• Nya Mercedes Manesis, MA
• Christoforos Manessis

• Pulmonary Disease Physician in Smithtown, NY
• Providers in Smithtown, NY by specialty
• Pulmonary Disease Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 25, 2026; 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.