Individual provider Active NPI

Matheau Antoine Julien, MD

  • Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
  • Round Rock, TX
National Provider Identifier
1619189933
Registry record updated Jul 15, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianTaxonomy code 208G00000X
License
U9422 Issued in TX
Practice address
300 University Blvd
Round Rock, TX 78665-1032
Phone
(515) 509-0100
Fax
(512) 218-6330
NPI assigned
May 7, 2007
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 15, 2026

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

Specialties & licenses 5

Specialty (taxonomy)CodeLicenseStatePrimary
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X 0101274262 VA
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X 036139510 IL
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X 4301517340 MI
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X 17695 ND
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X U9422 TX Primary

Addresses

Primary practice location

300 University Blvd
Round Rock, TX 78665-1032

Mailing address

PO Box 844658
Dallas, TX 75284-4658
Phone (254) 724-2111

Other practice location 1

263 Farmington Ave
Farmington, CT 06030-8063
Phone (860) 679-8080

Other practice location 2

22060 Beech St Ste 300
Dearborn, MI 48124-2847
Phone (313) 228-0230

Other practice location 3

525 Lilly Rd NE Ste 200
Olympia, WA 98506-5101
Phone (360) 493-4510

Other practice location 4

305 W Jackson St Ste 206
Carbondale, IL 62901-1474
Phone (618) 457-3006

Other practice location 5

600 Gresham Dr Ste 8600
Norfolk, VA 23507-1904
Phone (757) 388-6006

Other practice location 6

251 E Huron St
Galter 3-150
Chicago, IL 60611-2908
Phone (312) 926-6512

Other identifiers 1

IdentifierTypeStateIssuer
036139510OtherILILLINOIS DEPARTMENT OF FINANCIAL AND PROFESSIONAL REGULATION

Electronic endpoints 4

TypeEndpointUseAffiliation
Direct Messaging Address mjulien68357@sih.direct-ci.com
Direct Messaging Address mjulien100598@direct.med.uchc.edu
Direct Messaging Address mjulien1461181@wm.providencedirect.org Direct
Direct Messaging Address mjulien3608676@epic00.corewelldirect.org

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in IL, WA, CO, WI, ND, VA, IA, CA, MI, KS10 enrollments
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 10

Enrollment IDStateProvider typePAC IDDetails
I20160106000390 IL Practitioner - Cardiac SurgeryPractitioner - Thoracic Surgery 6002118254 Reassigns benefits to 5 organizations
I20190225000896 WA Practitioner - Thoracic SurgeryPractitioner - Cardiac Surgery 6002118254 Reassigns benefits to 3 organizations
I20201029000169 CO Practitioner - Thoracic SurgeryPractitioner - Cardiac Surgery 6002118254 Reassigns benefits to 2 organizations
I20211216001980 WI Practitioner - Cardiac SurgeryPractitioner - Thoracic Surgery 6002118254 Reassigns benefits to 2 organizations
I20220330001752 ND Practitioner - Thoracic SurgeryPractitioner - Cardiac Surgery 6002118254 Reassigns benefits to 1 organization
I20230125002966 VA Practitioner - Thoracic Surgery 6002118254 Reassigns benefits to 5 organizations
I20240222003048 IA Practitioner - Thoracic Surgery 6002118254 Reassigns benefits to 1 organization
I20251202003399 CA Practitioner - Cardiac SurgeryPractitioner - Thoracic Surgery 6002118254 Reassigns benefits to 1 organization
I20260408003602 MI Practitioner - Thoracic Surgery 6002118254 Reassigns benefits to 1 organization
I20260413002210 KS Practitioner - Cardiac Surgery 6002118254 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Thoracic Surgery
Education
Emory University School of Medicine, 2006
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Winchester Medical CenterGroup PAC ID 0244134021, 313 clinicians
Riverside Physician Services IncGroup PAC ID 5092608448, 793 clinicians
Carle Health Care IncorporatedGroup PAC ID 3577515774, 1,592 clinicians
Synergy CT Surgery PartnershipGroup PAC ID 5698939957, 19 clinicians

Practice addresses (Care Compare)

1840 Amherst St
Winchester, VA 22601-2808
Phone (540) 536-8700

22060 Beech St
Suite 300
Dearborn, MI 48124-2847
Phone (313) 228-0230

500 J Clyde Morris Blvd
Newport News, VA 23601-1929
Phone (757) 534-5511

611 W Park St
Urbana, IL 61801-2500

611 W Park St
Urbana, IL 61801-2501
Phone (888) 712-2753

901 San Bernardino Rd
Suite 102
Upland, CA 91786-4988
Phone (909) 579-6721

9119 W 74TH St
350 Ahmg Cardiology Vascular and Cardiot
Merriam, KS 66204-2268
Phone (913) 632-9400

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Coronary artery bypass graft (CABG)1-10

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
4301517340MIMDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician
U9422TXMDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Winchester Medical Center CurrentSince Jun 30, 2025 Accepting new patients
Virginia Mason Medical Center Thoracic Surgery (Cardiothoracic Vascular Surgery) CurrentSince Feb 14, 2019 Accepting new patients
Bon Secours Medical Group Hampton Roads Specialty Care LLC CurrentSince Jul 1, 2025 Accepting new patients
Riverside Physician Services, Inc. Thoracic Surgery (Cardiothoracic Vascular Surgery) CurrentSince Feb 3, 2023 Accepting new patients
Sentara Medical Group CurrentSince Jun 1, 2024 Accepting new patients
MCHS Hospitals Inc CurrentSince Dec 17, 2021 Accepting new patients
Synergy CT Surgery Partnership Thoracic Surgery (Cardiothoracic Vascular Surgery) CurrentSince Oct 1, 2025 Accepting new patients
Sanford Medical Center Fargo CurrentSince Dec 23, 2021 Accepting new patients
Riverside Physician Services Inc Current Accepting new patients
Providence Health & Services Washington Current Accepting new patients
Providence Health & Services Washington CurrentSince Feb 22, 2021 Accepting new patients
Providence Health & Services Washington CurrentSince Feb 22, 2021 Accepting new patients
Northwestern Medical Faculty Foundation CurrentSince Dec 21, 2015 Accepting new patients
Poudre Valley Medical Group, LLC Thoracic Surgery (Cardiothoracic Vascular Surgery) Current Accepting new patients
Carle Health Care Incorporated CurrentSince Mar 1, 2022 Accepting new patients
Medical Associates Clinic P C CurrentSince Jan 20, 2025 Accepting new patients
Banner Health Physicians Colorado LLC CurrentSince May 24, 2025 Accepting new patients
Winchester Medical Center CurrentSince Jun 30, 2025 Accepting new patients
Bon Secours Medical Group Hampton Roads Specialty Care LLC Thoracic Surgery (Cardiothoracic Vascular Surgery) CurrentSince Jul 1, 2025 Accepting new patients
Riverside Physician Services Inc CurrentSince Feb 3, 2023 Accepting new patients
Poudre Valley Medical Group, LLC Thoracic Surgery (Cardiothoracic Vascular Surgery) CurrentSince Jul 5, 2023 Accepting new patients
Northwestern Medical Faculty Foundation CurrentSince Dec 21, 2015 Accepting new patients
Valley Physician Enterprise, Inc Thoracic Surgery (Cardiothoracic Vascular Surgery) CurrentSince Jun 30, 2025 Accepting new patients
MCHS Hospitals Inc CurrentSince Dec 17, 2021 Accepting new patients
Virginia Mason Medical Center CurrentSince Feb 14, 2019 Accepting new patients
Sanford Medical Center Fargo CurrentSince Dec 23, 2021 Accepting new patients
Winchester Medical Center Current Accepting new patients
Marshfield Clinic Inc CurrentSince Dec 17, 2021 Accepting new patients
Carle West Physician Group Inc CurrentSince Mar 7, 2022 Accepting new patients
Valley Physician Enterprise, Inc. CurrentSince Jun 30, 2025 Accepting new patients
Rockford Health Physicians CurrentSince Oct 4, 2021 Accepting new patients
Virginia Mason Medical Center Current Accepting new patients
Southern Illinois Medical Services, NFP PastSince Feb 23, 2023 Accepting new patients
Carle Health Care Incorporated Past Accepting new patients

Locations (25 of 39)

901 San Bernardino Rd
Ste 102
Upland, CA 91786
Phone (909) 579-6721

4404 Barranca Ln
Castle Rock, CO 80104
Phone (720) 733-5260

1800 15th St
Ste 340
Greeley, CO 80631
Phone (970) 351-6044

1801 16th St
Ste C2B
Greeley, CO 80631
Phone (970) 810-4121

2500 Rocky Mountain Ave
Ste 100
Loveland, CO 80538
Phone (970) 624-1800

1900 Boise Ave
Ste 200
Loveland, CO 80538
Phone (970) 203-2120

1000 Langworthy St
Dubuque, IA 52001
Phone (563) 584-3455

1500 Associates Dr
Dubuque, IA 52002
Phone (563) 584-4100

2204 Eastland Dr
Bloomington, IL 61704
Phone (309) 662-9461

Dept 5777
Carol Stream, IL 60122

680 N Lake Shore Dr
Ste 810
Chicago, IL 60611
Phone (312) 926-8811

680 N Lake Shore Dr
Ste 1015
Chicago, IL 60611
Phone (312) 926-9674

251 E Huron St
#3150
Chicago, IL 60611
Phone (312) 926-2253

29624 Network Pl
Chicago, IL 60673
Phone (608) 741-7652

660 N Westmoreland Rd
#302
Lake Forest, IL 60045

1302 Franklin Ave
Ste 4500
Normal, IL 61761
Phone (309) 556-8300

2400 N Rockton Ave
Rockford, IL 61103
Phone (815) 971-6310

8201 E Riverside Blvd
Rockford, IL 61114
Phone (815) 971-4066

2300 N Rockton Ave
Rockford, IL 61103
Phone (815) 971-5510

611 W Park St
Urbana, IL 61801
Phone (217) 383-6941

1220 Sheyenne St
West Fargo, ND 58078
Phone (701) 234-4445

1000 N Shenandoah Ave
Front Royal, VA 22630
Phone (540) 636-0300

858 J Clyde Morris Blvd
Newport News, VA 23601
Phone (757) 594-4343

856 J Clyde Morris Blvd
Ste A
Newport News, VA 23601
Phone (757) 316-5900

500 J Clyde Morris Blvd
Ste 602
Newport News, VA 23601
Phone (757) 534-5511

Interoperability endpoints

  • Direct secure messaging: mjulien1461181@wm.providencedirect.org
  • Direct secure messaging: mjulien44706@enloedirect.org
  • Direct secure messaging: mjulien68357@sih.direct-ci.com
  • Direct secure messaging: mjulienmd344875@carlehiedirect.net
  • Direct secure messaging: mjulien3925698@direct.trinity-health.org
  • Direct secure messaging: mjulien3608676@epic00.corewelldirect.org
  • Direct secure messaging: mjulien1086694@valleyhealth.direct-ci.com
  • Direct secure messaging: mjulien1295097@direct.sw.org

Organizations & group practices 37

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.

View all 37

Hospital & facility affiliations 4

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

NPI Registry JSON

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

{
    "created_epoch": "1178496000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784073600000",
    "number": "1619189933",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 844658",
            "city": "DALLAS",
            "state": "TX",
            "postal_code": "752844658",
            "telephone_number": "254-724-2111"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 UNIVERSITY BLVD",
            "city": "ROUND ROCK",
            "state": "TX",
            "postal_code": "786651032",
            "telephone_number": "515-509-0100",
            "fax_number": "512-218-6330"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "263 Farmington Ave",
            "address_purpose": "LOCATION",
            "city": "Farmington",
            "state": "CT",
            "postal_code": "060308063",
            "country_code": "US",
            "telephone_number": "860-679-8080",
            "fax_number": "860-679-1430",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "22060 Beech St Ste 300",
            "address_purpose": "LOCATION",
            "city": "Dearborn",
            "state": "MI",
            "postal_code": "481242847",
            "country_code": "US",
            "telephone_number": "313-228-0230",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "525 Lilly Rd NE Ste 200",
            "address_purpose": "LOCATION",
            "city": "Olympia",
            "state": "WA",
            "postal_code": "985065101",
            "country_code": "US",
            "telephone_number": "360-493-4510",
            "fax_number": "360-493-7759",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "305 W Jackson St Ste 206",
            "address_purpose": "LOCATION",
            "city": "Carbondale",
            "state": "IL",
            "postal_code": "629011474",
            "country_code": "US",
            "telephone_number": "618-457-3006",
            "fax_number": "618-457-3007",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "600 Gresham Dr Ste 8600",
            "address_purpose": "LOCATION",
            "city": "Norfolk",
            "state": "VA",
            "postal_code": "235071904",
            "country_code": "US",
            "telephone_number": "757-388-6006",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "251 E Huron St",
            "address_2": "Galter 3-150",
            "address_purpose": "LOCATION",
            "city": "Chicago",
            "state": "IL",
            "postal_code": "606112908",
            "country_code": "US",
            "telephone_number": "312-926-6512",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "JULIEN",
        "first_name": "MATHEAU",
        "middle_name": "ANTOINE",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-05-07",
        "last_updated": "2026-07-15",
        "certification_date": "2026-07-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "VA",
            "license": "0101274262",
            "primary": false
        },
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "IL",
            "license": "036139510",
            "primary": false
        },
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "MI",
            "license": "4301517340",
            "primary": false
        },
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "ND",
            "license": "17695",
            "primary": false
        },
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "TX",
            "license": "U9422",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "ILLINOIS DEPARTMENT OF FINANCIAL AND PROFESSIONAL REGULATION",
            "identifier": "036139510",
            "state": "IL"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mjulien68357@sih.direct-ci.com",
            "affiliation": "N",
            "address_1": "305 W Jackson St Ste 206",
            "city": "Carbondale",
            "state": "IL",
            "country_code": "US",
            "postal_code": "629011474",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mjulien100598@direct.med.uchc.edu",
            "affiliation": "N",
            "address_1": "263 Farmington Ave",
            "city": "Farmington",
            "state": "CT",
            "country_code": "US",
            "postal_code": "060308063",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mjulien1461181@wm.providencedirect.org",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "525 Lilly Rd NE Ste 200",
            "city": "Olympia",
            "state": "WA",
            "country_code": "US",
            "postal_code": "985065101",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mjulien3608676@epic00.corewelldirect.org",
            "affiliation": "N",
            "address_1": "22060 Beech St Ste 300",
            "city": "Dearborn",
            "state": "MI",
            "country_code": "US",
            "postal_code": "481242847",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Round Rock, TX

Sources for this page

Verify at the official NPI Registry.