William James Giesen, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

CT023721 Issued in CT

Practice address

1500 Post Rd.
Darien, CT 06820

Phone

(203) 655-2516

Fax

(203) 656-3665

NPI assigned

Oct 27, 2006

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Other identifiers 5

Medicare fee-for-service enrollment

Enrolled in CT

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

Georgetown University School of Medicine, 1975

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Practice addresses (Care Compare)

Hospital & facility affiliations

• Stamford Hospital Hospital, Stamford, CT, CCN 070006
• Greenwich Hospital Association - Hospital, Greenwich, CT, CCN 070018

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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

• Greenwich Hospital

  • General Acute Care Hospital
  • Greenwich, CT
  • NPI 1609846088
  Care Compare affiliation
• Stamford Hospital

  • General Acute Care Hospital
  • Stamford, CT
  • NPI 1356331425
  Care Compare affiliation

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

{
    "created_epoch": "1161907200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1462752000000",
    "number": "1124104724",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1500 POST RD",
            "city": "DARIEN",
            "state": "CT",
            "postal_code": "06820",
            "telephone_number": "203-655-2516",
            "fax_number": "203-656-3665"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1500 POST RD.",
            "city": "DARIEN",
            "state": "CT",
            "postal_code": "06820",
            "telephone_number": "203-655-2516",
            "fax_number": "203-656-3665"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GIESEN",
        "first_name": "WILLIAM",
        "middle_name": "JAMES",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-10-27",
        "last_updated": "2016-05-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CT",
            "license": "CT023721",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "GUARDIAN",
            "identifier": "061258283",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "US HEALTHCARE",
            "identifier": "0697273",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "AETNA",
            "identifier": "4111798",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CHP",
            "identifier": "061258283",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CONNECTICARE",
            "identifier": "237210",
            "state": null
        }
    ],
    "endpoints": [],
    "other_names": []
}

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• Mitchell Gilbertie, PT
• Daniel Jeremy Glass, PHD
• Katherine Godfrey, LPC-A
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• Gold Coast Standard PC

• Internal Medicine Physician in Darien, CT
• Providers in Darien, CT by specialty
• Internal Medicine Physician in Connecticut

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 9, 2016; 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.