Alexander Diaz Seger, MD

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

036.165127 Issued in IL

Practice address

206 N Randolph St Ofc 246
Champaign, IL 61820-3949

Phone

(833) 351-8255

NPI assigned

Jul 1, 2019

Sex

Male

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 IL

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

Psychiatry

Education

Creighton University School of Medicine, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Physician Services Corporation of Southern Illinois IncGroup PAC ID 9234022567, 120 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• SSM Health St Mary'S Hospital -Centralia Hospital, Centralia, IL, CCN 140034

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: aseger453704@direct-ehr-ssmhc.com

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.

• Physician Services Corporation of Southern Illinois Inc.

  • Internal Medicine Physician
  • Mount Vernon, IL
  • NPI 1831101807
  Medicare reassignment Care Compare group NPD

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

• St Mary'S Hospital, Centralia, Illinois

  • General Acute Care Hospital
  • Centralia, IL
  • NPI 1083617245
  Care Compare affiliation

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

{
    "created_epoch": "1561939200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786320000000",
    "number": "1457913279",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "206 N RANDOLPH ST OFC 246",
            "city": "CHAMPAIGN",
            "state": "IL",
            "postal_code": "618203949"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "206 N RANDOLPH ST OFC 246",
            "city": "CHAMPAIGN",
            "state": "IL",
            "postal_code": "618203949",
            "telephone_number": "833-351-8255"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1 W Winter St Ste 200",
            "address_purpose": "LOCATION",
            "city": "Delaware",
            "state": "OH",
            "postal_code": "430154635",
            "country_code": "US",
            "telephone_number": "833-351-8255",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "109 W 27th St Rm 5S",
            "address_purpose": "LOCATION",
            "city": "New York",
            "state": "NY",
            "postal_code": "100016208",
            "country_code": "US",
            "telephone_number": "833-351-8255",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SEGER",
        "first_name": "ALEXANDER",
        "middle_name": "DIAZ",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-07-01",
        "last_updated": "2026-08-10",
        "certification_date": "2026-08-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "NE",
            "license": "35426",
            "primary": false
        },
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "IL",
            "license": "036.165127",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Robert Benjamin Scott, D.M.D.
• Seasons Counseling
• Barbara Rader Sebens, DT
• Allison Kate Seehafer, AU.D.
• Amanda Seets, SSP, NCSP
• J. Timothy Sehy, M.D.
• Steven W. Seibert, D.M.D.
• Danielle Seibring, LPC
• Bradley Seiler
• Stephen Lee Seiter

• Psychiatry Physician in Champaign, IL
• Providers in Champaign, IL by specialty
• Psychiatry Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 10, 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.