Gregory Mark Wittenburg, MD
Family Medicine Physician · Austin, TX
Gregory Mark Wittenburg, MD is a family medicine physician with a practice address in Austin, Texas, and NPI 1689234916, issued on Jun 18, 2019. Check the license (Texas W5205, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory Mark Wittenburg
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- W5205 TX
Self-reported in NPPES; status is on the state search - Practice location
- 2806 Real St, Austin, TX 78722
- Phone
- (512) 978-8130
- Enumerated
- Jun 18, 2019
- Record last updated
- Jul 14, 2026
- Medicare enrollment
- Enrolled (PECOS I20220929001773); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 2019
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 11,119 in Texas → Look up another NPI →
Also registered at 2806 Real St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Joshua HeibelPhysical Therapy Assistant1407336001
- Christopher Martin, FNPAdult Health Nurse Practitioner1730864620
Verify Gregory Mark Wittenburg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license W5205Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average family medicine physician in 2024
80 Medicare Part D claims for 61 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 88.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Vep Hutchinson Emergency Medical Group LLCGarden City, KS
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Mark Wittenburg among 11,119 family medicine physician records in Texas
Gregory Mark Wittenburg, MD is one of 11,119 family medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2019 · median 2004 among the 7,095 with a school on file
- Record last updated2026 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
544 family medicine physician records list a practice address in Austin
They are 544 of the 26,585 NPPES records with a practice address in Austin, and 11,119 family medicine physician records in Texas.
All 11,119 in Texas → Every provider in Austin → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Lisa Doggett, MD, MPHAustin, TX 787221982611026
- Brianna Hurtado, FNP-CAustin, TX 787221144988304
- Claudia Ruiz, M.D.Austin, TX 787221386847135
- Lawrence Broder, MDAustin, TX 787231467468736
- Norman Chenven, MDAustin, TX 787231689680027
- Cary Douglass, M.D.Austin, TX 787231477564342
- Cara Goodell, M.D.Austin, TX 787211235498171
- Petra Kelsey, MDAustin, TX 787231578927026
Common questions
What is Gregory Mark Wittenburg, MD's NPI number?
Gregory Mark Wittenburg, MD's National Provider Identifier (NPI) is 1689234916, issued on Jun 18, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Mark Wittenburg, MD located?
The NPPES record lists a practice address at 2806 Real St, Austin, TX, 78722. Phone: (512) 978-8130. Providers update this record themselves, so call before visiting.
How can I verify Gregory Mark Wittenburg, MD's license?
NPPES lists Texas license number W5205, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Mark Wittenburg, MD prescribe under Medicare Part D?
In 2024, Gregory Mark Wittenburg, MD had 80 Medicare Part D claims for 61 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Gregory Mark Wittenburg, MD's MIPS final score?
The 2023 MIPS final score is 88.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.