NPIMap

Individual provider Active NPI

Gregory Mark Wittenburg, MD

  • Family Medicine Physician
  • Austin, TX
National Provider Identifier
1689234916
Registry record updated Jul 14, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
W5205 Issued in TX
Practice address
2806 Real St
Austin, TX 78722-1715
Phone
(512) 978-8130
NPI assigned
Jun 18, 2019
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 14, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Family Medicine Physician 207Q00000X W5205 TX Primary

Addresses

Primary practice location

2806 Real St
Austin, TX 78722-1715

Mailing address

1111 E Cesar Chavez St
Austin, TX 78702-4209
Phone (512) 978-8130

Other names 1

  • Dr. Greg Wittenburg Other name

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in KS
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20220929001773 KS Practitioner - Emergency Medicine 0345628707 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Emergency Medicine
Education
Creighton University School of Medicine, 2019
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Vep Hutchinson Emergency Medical Group LLCGroup PAC ID 5092031054, 19 clinicians

Practice addresses (Care Compare)

401 E Spruce St
Garden City, KS 67846-5679
Phone (620) 272-2290

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
93.85 of 100Reported as group
Quality
91.15
Improvement activities
40

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Premier Emergency Services, Inc Emergency Medicine CurrentSince Jul 27, 2022 Accepting new patients
Premier Emergency Services, Inc Emergency Medicine CurrentSince Jul 27, 2022 Accepting new patients
Vep Hutchinson Emergency Medical Group, LLC Emergency Medicine CurrentSince Apr 1, 2025 Accepting new patients
Usacs Observation Medicine Services of Colorado Inc. Emergency Medicine Current Accepting new patients
Usacs Observation Medicine Services of Colorado Inc. CurrentSince Jul 29, 2022 Accepting new patients
Usacs of Colorado Inc Emergency Medicine CurrentSince Aug 26, 2022 Accepting new patients
Usacs of Colorado, Inc Emergency Medicine CurrentSince Jul 27, 2022 Accepting new patients
Usacs of Colorado Inc Emergency Medicine CurrentSince Jul 27, 2022 Accepting new patients
Usacs Observation Medicine Services of Colorado Inc. Emergency Medicine CurrentSince Jul 29, 2022 Accepting new patients
Travis County Healthcare District Family Medicine PastSince Sep 5, 2021 Accepting new patients

Locations

11600 W 2nd Pl
Lakewood, CO 80228
Phone (720) 321-1010

7700 S Broadway
Littleton, CO 80122
Phone (303) 269-4786

2551 W 84th Ave
Westminster, CO 80031
Phone (303) 202-1280

3001 Avenue A
Dodge City, KS 67801
Phone (620) 225-8400

401 E Spruce St
Garden City, KS 67846
Phone (620) 272-2222

Organizations & group practices 10

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.

Hospital & facility affiliations 2

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

NPI Registry JSON

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

{
    "created_epoch": "1560816000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783987200000",
    "number": "1689234916",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1111 E CESAR CHAVEZ ST",
            "city": "AUSTIN",
            "state": "TX",
            "postal_code": "787024209",
            "telephone_number": "512-978-8130"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2806 REAL ST",
            "city": "AUSTIN",
            "state": "TX",
            "postal_code": "787221715",
            "telephone_number": "512-978-8130"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WITTENBURG",
        "first_name": "GREGORY",
        "middle_name": "MARK",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-06-18",
        "last_updated": "2026-07-14",
        "certification_date": "2026-07-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "TX",
            "license": "W5205",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "GREG",
            "last_name": "WITTENBURG",
            "prefix": "DR.",
            "credential": "MD",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

Other providers in Austin, TX

Sources for this page

Verify at the official NPI Registry.