Marilyn Day, MD

Primary specialty

Gynecologic Oncology PhysicianTaxonomy code 207VX0201X

License

MT237687 Issued in PA

Practice address

3509 N Broad St
Philadelphia, PA 19140-4105

Phone

(800) 836-7536

NPI assigned

Apr 8, 2022

Last updated

Jun 17, 2026By the provider in NPPES

Sex

Female

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

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.

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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

{
    "created_epoch": "1649376000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781654400000",
    "number": "1790427086",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "101 NICOLLS ROAD",
            "address_2": "HSC, T9, ROOM 020",
            "city": "STONY BROOK",
            "state": "NY",
            "postal_code": "117948091",
            "telephone_number": "631-444-2739"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3509 N BROAD ST",
            "city": "PHILADELPHIA",
            "state": "PA",
            "postal_code": "191404105",
            "telephone_number": "800-836-7536"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DAY",
        "first_name": "MARILYN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2022-04-08",
        "last_updated": "2026-06-17",
        "certification_date": "2026-06-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207VX0201X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology, Gynecologic Oncology",
            "state": "PA",
            "license": "MT237687",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Dawsons in Home Care LLC
• Darby Day
• Doren Day, L.AC., DIPL.AC
• Elizabeth Campanella Day, CPNP-AC
• Emily Phelps Day, MD
• Mary Patricia Day, CRNA
• Regina Caroline Day, PA-C
• Ronald Michael Day, D.M.D.
• Roseann Kennedy Day, MD
• Sharlene Mary Day, MD

• Gynecologic Oncology Physician in Philadelphia, PA
• Providers in Philadelphia, PA by specialty
• Gynecologic Oncology Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 17, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.