Ryan Messer

Primary specialty

Critical Care Medicine Registered NurseTaxonomy code 163WC0200X

License

952076 Issued in NY

Practice address

462 1St Ave
New York, NY 10016-9196

Phone

(212) 562-4141

NPI assigned

Oct 1, 2026

Last updated

Oct 1, 2026By 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 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

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

{
    "created_epoch": "1790812800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1790812800000",
    "number": "1528972064",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "40 WATERSIDE PLZ APT 5F",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100102639"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "462 1ST AVE",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100169196",
            "telephone_number": "212-562-4141"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MESSER",
        "first_name": "RYAN",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2026-10-01",
        "last_updated": "2026-10-01",
        "certification_date": "2026-10-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "163WC0200X",
            "taxonomy_group": "",
            "desc": "Registered Nurse, Critical Care Medicine",
            "state": "NY",
            "license": "952076",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Philip S. Messenger, DPM
• Alexander Carl Messer, LCSW
• Barbara Hyde Messer, MSW
• Caroline Korsten Messer, MD
• Julio Messer, M.D.
• Sylvie J Messer
• Oren Messeri, M.D.
• Franz H Messerli, M.D.
• Barbara Graham Messick, ED.D.
• Lorraine D Messier

• Critical Care Medicine Registered Nurse in New York, NY
• Providers in New York, NY by specialty
• Critical Care Medicine Registered Nurse in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 1, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.

Verify at the official NPI Registry.