Igor Darko Gregoric, M.D.

Primary specialty

Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianTaxonomy code 208G00000X

License

L0223 Issued in TX

Practice address

1101 Bates Ave
Suite P-514
Houston, TX 77030-2607

Phone

(832) 355-4900

Fax

(832) 355-3770

NPI assigned

Oct 10, 2006

Last updated

Aug 24, 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 2

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in TX

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

Cardiac SurgeryAlso: Cardiovascular Disease (Cardiology), General Surgery

Education

Other, 1979

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Ut PhysiciansGroup PAC ID 8426960360, 1,744 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

84.11 of 100Reported as group

Quality

69.15

Promoting interoperability

100

Improvement activities

40

Cost

73.63

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: igord.gregoric@direct.memorialhermann.org
• Direct secure messaging: igregoric38566@memorialhermann.direct-ci.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.

• Ut Physicians

  • Anesthesiology Physician
  • Houston, TX
  • NPI 1033157821
  Medicare reassignment Care Compare group NPD
• Ut Physicians

  dba UT Health Services

  • Health Educator
  • Houston, TX
  • NPI 1316534472
  NPD
• Surgical Associates of Texas PA

  • Specialist
  • Houston, TX
  • NPI 1629102181
  NPD (past)

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

{
    "created_epoch": "1160438400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787529600000",
    "number": "1043308844",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1101 BATES AVE",
            "address_2": "SUITE P-514",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770302607",
            "telephone_number": "832-355-4900",
            "fax_number": "832-355-3770"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1101 BATES AVE",
            "address_2": "SUITE P-514",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770302607",
            "telephone_number": "832-355-4900",
            "fax_number": "832-355-3770"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "4502 Medical Dr",
            "address_purpose": "LOCATION",
            "city": "San Antonio",
            "state": "TX",
            "postal_code": "782294402",
            "country_code": "US",
            "telephone_number": "210-358-4000",
            "fax_number": "210-358-4775",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GREGORIC",
        "first_name": "IGOR",
        "middle_name": "DARKO",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-10-10",
        "last_updated": "2026-08-24",
        "certification_date": "2026-08-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "174400000X",
            "taxonomy_group": "",
            "desc": "Specialist",
            "state": "TX",
            "license": "L0223",
            "primary": false
        },
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "TX",
            "license": "L0223",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "020047577",
            "state": "TX"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Justin Gregg, M.D.
• Lucile Parker Gregg, M.D.
• Melanie Yard Gregg, PH.D.
• Victoria Gregg, MD
• Shannon McAllister Gregorek, NP-C
• Gregorio Healthcare Systems LLC
• Giorgio Gregorio, LMT
• Jason Gregorio, MD
• Gregory Eugene Johnson (Dr Gregory E Johnson DC)
• Gregory Howard, M.D.

• Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Houston, TX
• Providers in Houston, TX by specialty
• Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 24, 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.