Active NPI
Matheau Antoine Julien, MD
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
- Round Rock, TX
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
- License
- U9422
- 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
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 5
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| 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
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 036139510 | Other | IL | ILLINOIS DEPARTMENT OF FINANCIAL AND PROFESSIONAL REGULATION |
Electronic endpoints 4
| Type | Endpoint | Use | Affiliation |
|---|---|---|---|
| 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, KS
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 10
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
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
| Procedure | Number 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
| License | State | Type | Specialty |
|---|---|---|---|
| 4301517340 | MI | MD | Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician |
| U9422 | TX | MD | Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Winchester Medical Center | Current | Accepting new patients | |
| Virginia Mason Medical Center | Thoracic Surgery (Cardiothoracic Vascular Surgery) | Current | Accepting new patients |
| Bon Secours Medical Group Hampton Roads Specialty Care LLC | Current | Accepting new patients | |
| Riverside Physician Services, Inc. | Thoracic Surgery (Cardiothoracic Vascular Surgery) | Current | Accepting new patients |
| Sentara Medical Group | Current | Accepting new patients | |
| MCHS Hospitals Inc | Current | Accepting new patients | |
| Synergy CT Surgery Partnership | Thoracic Surgery (Cardiothoracic Vascular Surgery) | Current | Accepting new patients |
| Sanford Medical Center Fargo | Current | Accepting new patients | |
| Riverside Physician Services Inc | Current | Accepting new patients | |
| Providence Health & Services Washington | Current | Accepting new patients | |
| Providence Health & Services Washington | Current | Accepting new patients | |
| Providence Health & Services Washington | Current | Accepting new patients | |
| Northwestern Medical Faculty Foundation | Current | Accepting new patients | |
| Poudre Valley Medical Group, LLC | Thoracic Surgery (Cardiothoracic Vascular Surgery) | Current | Accepting new patients |
| Carle Health Care Incorporated | Current | Accepting new patients | |
| Medical Associates Clinic P C | Current | Accepting new patients | |
| Banner Health Physicians Colorado LLC | Current | Accepting new patients | |
| Winchester Medical Center | Current | Accepting new patients | |
| Bon Secours Medical Group Hampton Roads Specialty Care LLC | Thoracic Surgery (Cardiothoracic Vascular Surgery) | Current | Accepting new patients |
| Riverside Physician Services Inc | Current | Accepting new patients | |
| Poudre Valley Medical Group, LLC | Thoracic Surgery (Cardiothoracic Vascular Surgery) | Current | Accepting new patients |
| Northwestern Medical Faculty Foundation | Current | Accepting new patients | |
| Valley Physician Enterprise, Inc | Thoracic Surgery (Cardiothoracic Vascular Surgery) | Current | Accepting new patients |
| MCHS Hospitals Inc | Current | Accepting new patients | |
| Virginia Mason Medical Center | Current | Accepting new patients | |
| Sanford Medical Center Fargo | Current | Accepting new patients | |
| Winchester Medical Center | Current | Accepting new patients | |
| Marshfield Clinic Inc | Current | Accepting new patients | |
| Carle West Physician Group Inc | Current | Accepting new patients | |
| Valley Physician Enterprise, Inc. | Current | Accepting new patients | |
| Rockford Health Physicians | Current | Accepting new patients | |
| Virginia Mason Medical Center | Current | Accepting new patients | |
| Southern Illinois Medical Services, NFP | Past | 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
- mjulien1461181@wm.providencedirect.org
- mjulien44706@enloedirect.org
- mjulien68357@sih.direct-ci.com
- mjulienmd344875@carlehiedirect.net
- mjulien3925698@direct.trinity-health.org
- mjulien3608676@epic00.corewelldirect.org
- mjulien1086694@valleyhealth.direct-ci.com
- 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.
-
- Internal Medicine Physician
- Urbana, IL
- NPI 1154653947
-
- Gastroenterology Physician
- Newport News, VA
- NPI 1194929026
-
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
- Upland, CA
- NPI 1366711236
-
- Critical Care Medicine (Internal Medicine) Physician
- Winchester, VA
- NPI 1679711261
-
- Surgery Physician
- Royal Oak, MI
- NPI 1578072906
-
- Family Medicine Physician
- Merriam, KS
- NPI 1992735690
-
- Multi-Specialty Clinic/Center
- Greeley, CO
- NPI 1073899134
-
- Cardiovascular Disease Physician
- Richmond, VA
- NPI 1629637475
Thoracic Surgery (Cardiothoracic Vascular Surgery)
-
- Family Medicine Physician
- Normal, IL
- NPI 1467074138
-
- Clinic/Center
- Marshfield, WI
- NPI 1952347981
-
- Clinic/Center
- Marshfield, WI
- NPI 1093221434
-
- Multi-Specialty Clinic/Center
- Dubuque, IA
- NPI 1457300790
Hospital & facility affiliations 4
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Palm Springs, CA
- NPI 1104856095
-
- General Acute Care Hospital
- Newport News, VA
- NPI 1366547747
-
- General Acute Care Hospital
- Urbana, IL
- NPI 1013071653
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
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 15, 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.