William Sidelinger, MD

Primary specialty

Child & Adolescent Psychiatry PhysicianTaxonomy code 2084P0804X

License

1023236 Issued in MA

Practice address

309 Belmont St
Worcester, MA 01604-1059

Phone

(508) 368-3300

NPI assigned

Apr 12, 2020

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

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.

Specialty

Psychiatry

Education

University of Massachusetts Medical School, 2020

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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

{
    "created_epoch": "1586649600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750032000000",
    "number": "1467071209",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1601 23RD AVENUE SOUTH",
            "address_2": "TRAINING OFFICE SUITE 3105 VPH",
            "city": "NASHVILLE",
            "state": "TN",
            "postal_code": "37212"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "309 BELMONT ST",
            "city": "WORCESTER",
            "state": "MA",
            "postal_code": "016041059",
            "telephone_number": "508-368-3300"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIDELINGER",
        "first_name": "WILLIAM",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-04-12",
        "last_updated": "2025-06-16",
        "certification_date": "2025-06-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0804X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Child & Adolescent Psychiatry",
            "state": "MA",
            "license": "1023236",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Christine Sicuso
• Joseph N. Sidari, MD
• Ghada Siddik
• Asma Siddiqui
• Efaza Umar Siddiqui, MD
• Nancy H Sidhom, NP
• Samarth Singh Sidhu, MD
• Anne Siegel, MS
• Judith Ann Siegel, MD
• Randee Lauren Siegel, LICSW

• Child & Adolescent Psychiatry Physician in Worcester, MA
• Providers in Worcester, MA by specialty
• Child & Adolescent Psychiatry Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 16, 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.