Aaron Patrick Fieker, D.O.

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

4758 Issued in OK

Practice address

10210 E 91St St
Tulsa, OK 74133-5834

Phone

(918) 940-8500

NPI assigned

Apr 26, 2007

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

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

Gastroenterology

Education

Oklahoma State University College of Osteopathic Medicine, 2005

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Gastroenterology Specialists, Inc.Group PAC ID 0446251664, 21 clinicians

St. John Physicians, Inc.Group PAC ID 2567366495, 262 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
• Ascension St John Jane Phillips Hospital, Bartlesville, OK, CCN 370018
• Saint Francis Hospital South, LLC Hospital, Tulsa, OK, CCN 370218
• Saint Francis Hospital, Inc Hospital, Tulsa, OK, CCN 370091

Procedures performed for Medicare patients

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 and National Provider Directory roles.

• Gastroenterology Specialists, Inc.

  • Gastroenterology Physician
  • Tulsa, OK
  • NPI 1932152410
  Medicare reassignment Care Compare group NPD
• St. John Physicians, Inc.

  • Internal Medicine Physician
  • Tulsa, OK
  • NPI 1336194406

  Gastroenterology

  Medicare reassignment Care Compare group NPD
• Warren Clinic Inc

  • General Practice Physician
  • Tulsa, OK
  • NPI 1174582282
  Medicare reassignment NPD
• St. John Physicians, Inc

  • Rural Health Clinic/Center
  • Barnsdall, OK
  • NPI 1033176367
  NPD

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

• Jane Phillips Memorial Medical Center, Inc.

  • General Acute Care Hospital
  • Bartlesville, OK
  • NPI 1215914254
  Care Compare affiliation
• Jane Phillips Memorial Medical Center, Inc.

  • Medicare Defined Swing Bed Hospital Unit
  • Bartlesville, OK
  • NPI 1427428986
  Care Compare affiliation
• Saint Francis Hospital South LLC

  • General Acute Care Hospital
  • Tulsa, OK
  • NPI 1376561944
  Care Compare affiliation
• Saint Francis Hospital, Inc.

  • Rehabilitation Hospital Unit
  • Tulsa, OK
  • NPI 1003039488
  Care Compare affiliation
• Saint Francis Hospital, Inc.

  • General Acute Care Hospital
  • Tulsa, OK
  • NPI 1144228487
  Care Compare affiliation
• 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

  • 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": "1177545600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1747872000000",
    "number": "1326268079",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6600 S YALE AVE STE 1200",
            "city": "TULSA",
            "state": "OK",
            "postal_code": "741363361",
            "telephone_number": "918-488-6045",
            "fax_number": "918-488-6098"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "10210 E 91ST ST",
            "city": "TULSA",
            "state": "OK",
            "postal_code": "741335834",
            "telephone_number": "918-940-8500"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "FIEKER",
        "first_name": "AARON",
        "middle_name": "PATRICK",
        "credential": "D.O.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-04-26",
        "last_updated": "2025-05-22",
        "certification_date": "2025-05-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "OK",
            "license": "4758",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Denise Anne Fholer, LMSW
• Hailey Fialkowski, RN, BSN
• Tiffany Loy Fichtenberg
• Fidelis Radiology, Inc.
• Fiduchie Healthcare. LLC
• Garrett Lee Field, DPT
• Allan Spencer Fielding, M.D.
• Keely Gardner Fielding
• Amber Fields, MS
• Bobbie Jurhee Fields, M.ED

• Gastroenterology Physician in Tulsa, OK
• Providers in Tulsa, OK by specialty
• Gastroenterology Physician in Oklahoma

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 22, 2025; 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.