Quick answers
- Does John R. Gburek accept Medicare assignment?
- Yes. Medicare's clinician data says John R. Gburek accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does John R. Gburek see?
- In 2024, CMS data shows 266 Original Medicare patients and 8,560 services for John R. Gburek. This counts Original Medicare only and measures volume, not quality.
- What is John R. Gburek's NPI number?
- 1689024291. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for John R. Gburek, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 266 |
|---|---|
| Services billed to Medicare | 8,560 |
| Different services or procedures | 42 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)3,600 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)581 services
- Testing for presence of drug, read by direct observation (80305)159 services
- Injection, midazolam hydrochloride, per 1 mg (J2250)114 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)68 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- Arthritis75%
- High blood pressure74%
- High cholesterol73%
- Anxiety39%
- Depression35%
- Ischemic heart disease28%
Practice locations
Addresses where John R. Gburek is enrolled with Medicare (CMS data updated October 2, 2026).
- 12176 N Mopac Expy, Suite DAustin, TX 78758 (512) 981‑7246
Group practices
Medicare enrollment lists John R. Gburek as a member of this group (CMS data updated October 2, 2026).
- Robert Marks MD PLLC6 clinicians in the group
Specialties
- Anesthesiologyprimary
- Pain Managementalso
Other anesthesiologists in Austin
Clinicians with the same Medicare primary specialty in Austin, TX — not a recommendation.
Other clinicians in Robert Marks MD PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Michigan State University College Of Human Medicine |
| Graduation year | 2016 (10 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1689024291 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians