George Gregory Demopoulos

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

6642 Issued in OK

Practice address

1705 E 19TH St Ste 302
Tulsa, OK 74104-5410

Phone

(918) 748-7585

Fax

(918) 403-6352

NPI assigned

Apr 16, 2018

Last updated

Mar 10, 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

Medicare fee-for-service enrollment

Enrolled in OK

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

Internal MedicineAlso: Hospitalist

Education

Michigan State University College of Osteopathic Medicine, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Usacs Observation Medicine Services of Oklahoma, LLCGroup PAC ID 9931562956, 203 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Ascension St John Medical Center Hospital, Tulsa, OK, CCN 370114
• Ascension St John Broken Arrow Hospital, Broken Arrow, OK, CCN 370235

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

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.

• Usacs Observation Medicine Services of Oklahoma, LLC

  • Emergency Medicine Physician
  • Tulsa, OK
  • NPI 1326739111
  Medicare reassignment Care Compare group NPD
• St. John Physicians, Inc.

  • Internal Medicine Physician
  • Tulsa, OK
  • NPI 1336194406
  Medicare reassignment NPD
• Usacs Critical Care Medicine of Oklahoma, LLC

  • Critical Care Medicine (Internal Medicine) Physician
  • Broken Arrow, OK
  • NPI 1255166856
  Medicare reassignment NPD
• Hospitalist Medicine Physicians of Texas, PLLC

  • Internal Medicine Physician
  • Humble, TX
  • NPI 1629307095

  OK

  Medicare reassignment NPD
• St. John Physicians, Inc

  dba Siggins Memorial Clinic

  • Rural Health Clinic/Center
  • Barnsdall, OK
  • NPI 1033176367
  NPD
• Cogent Healthcare of Texas, PA

  • Internal Medicine Physician
  • Dallas, TX
  • NPI 1992722953
  NPD
• St John Medical Center Inc

  • General Acute Care Hospital
  • Tulsa, OK
  • NPI 1154417368
  NPD (past)

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

• St John Medical Center Inc

  • General Acute Care Hospital
  • Tulsa, OK
  • NPI 1154417368
  Care Compare affiliation
• St John Medical Center Inc

  • Rehabilitation Hospital Unit
  • Tulsa, OK
  • NPI 1578656161
  Care Compare affiliation
• St. John Broken Arrow, Inc

  dba Ascension St. John Jenks

  • General Acute Care Hospital
  • Broken Arrow, OK
  • NPI 1497988596
  Care Compare affiliation

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

{
    "created_epoch": "1523836800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773100800000",
    "number": "1942797840",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1705 E 19TH ST STE 302",
            "city": "TULSA",
            "state": "OK",
            "postal_code": "741045410",
            "telephone_number": "918-748-7585",
            "fax_number": "918-403-6352"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1705 E 19TH ST STE 302",
            "city": "TULSA",
            "state": "OK",
            "postal_code": "741045410",
            "telephone_number": "918-748-7585",
            "fax_number": "918-403-6352"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DEMOPOULOS",
        "first_name": "GEORGE",
        "middle_name": "GREGORY",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-04-16",
        "last_updated": "2026-03-10",
        "certification_date": "2026-03-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "OK",
            "license": "6642",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Taylor Dement
• Kandra Demery
• Jordan Demetriades
• Sharon Hilburn Demier, M.A.
• Ted Ferron Demille
• Savannah Demoret
• Amy Demoss
• Annabelle Morgan Demoss, CPM
• Justin Cord Demoss, DPT
• Dawn Rochelle Demott, OTR

• Internal Medicine Physician in Tulsa, OK
• Providers in Tulsa, OK by specialty
• Internal Medicine Physician in Oklahoma

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