Matthew William Segar, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

S6934 Issued in TX

Practice address

6770 Bertner Ave
Houston, TX 77030-2604

Phone

(713) 790-9401

NPI assigned

Mar 18, 2018

Last updated

May 13, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 4

Addresses

Medicare fee-for-service enrollment

Enrolled in IN

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

Cardiovascular Disease (Cardiology)

Education

Indiana University School of Medicine, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

St Vincent Medical Group IncGroup PAC ID 7012047640, 728 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: msegar81215@direct.phhs.org
• Direct secure messaging: msegar83998@direct.kelsey-seybold.com

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• St. Vincent Medical Group, Inc.

  dba Ascension Medical Group St. Vincent

  • Orthopaedic Surgery Physician
  • Winchester, IN
  • NPI 1144513375
  Medicare reassignment Care Compare group
• Kelsey-Seybold Medical Group, PLLC

  dba Kelsey Seybold Clinic

  • Multi-Specialty Clinic/Center
  • Houston, TX
  • NPI 1013915255

  Internal Medicine

  NPD
• St. Vincent Medical Group, Inc.

  dba Ascension Medical Group St. Vincent

  • Internal Medicine Physician
  • Carmel, IN
  • NPI 1811881527
  NPD (past)

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

{
    "created_epoch": "1521331200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1778630400000",
    "number": "1942703749",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "11511 SHADOW CREEK PKWY",
            "city": "PEARLAND",
            "state": "TX",
            "postal_code": "775847298",
            "telephone_number": "713-442-0000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "6770 BERTNER AVE",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770302604",
            "telephone_number": "713-790-9401"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "6624 Fannin St Fl 19",
            "address_purpose": "LOCATION",
            "city": "Houston",
            "state": "TX",
            "postal_code": "770302312",
            "country_code": "US",
            "telephone_number": "713-442-0000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "10590 N Meridian St Ste 200",
            "address_purpose": "LOCATION",
            "city": "Carmel",
            "state": "IN",
            "postal_code": "462901028",
            "country_code": "US",
            "telephone_number": "317-338-6666",
            "fax_number": "317-338-6066",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1000 N 16th St Ste 240",
            "address_purpose": "LOCATION",
            "city": "New Castle",
            "state": "IN",
            "postal_code": "473624319",
            "country_code": "US",
            "telephone_number": "765-521-1461",
            "fax_number": "765-599-3101",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SEGAR",
        "first_name": "MATTHEW",
        "middle_name": "WILLIAM",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-03-18",
        "last_updated": "2026-05-13",
        "certification_date": "2026-05-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IN",
            "license": "01099254A",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "TX",
            "license": "S6934",
            "primary": true
        },
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "IN",
            "license": "01099254A",
            "primary": false
        },
        {
            "code": "208D00000X",
            "taxonomy_group": "",
            "desc": "General Practice",
            "state": "TX",
            "license": "S6934",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Sefan Healthcare Services,Inc.
• Nicole Walters Segada, M.D.
• Graham Victor Segal
• Jennifer M Segal, M.D.
• Jennifer Margaret Segar, M.D.
• Kristen Leigh Segars
• Jennifer Leigh Segel, LPC
• Catherine Patricia Seger, M.D.
• John J Seger, M.D.
• Anslee Segers

• Internal Medicine Physician in Houston, TX
• Providers in Houston, TX by specialty
• Internal Medicine Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 13, 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.