Quick answers
- Does Bartlomiej Posnik accept Medicare assignment?
- Yes. Medicare's clinician data says Bartlomiej Posnik 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 Bartlomiej Posnik see?
- In 2024, CMS data shows 540 Original Medicare patients and 165,145 services for Bartlomiej Posnik. This counts Original Medicare only and measures volume, not quality.
- What is Bartlomiej Posnik's NPI number?
- 1609286251. 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 Bartlomiej Posnik, 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 | 540 |
|---|---|
| Services billed to Medicare | 165,145 |
| Different services or procedures | 156 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) (Q0138)28,050 services
- Injection, darbepoetin alfa, 1 microgram (non-esrd use) (J0881)13,910 services
- Injection, pembrolizumab, 1 mg (J9271)12,500 services
- Injection, fosaprepitant, 1 mg (J1453)7,800 services
- Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)1,074 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).
- High blood pressure75%
- High cholesterol74%
- Arthritis46%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)43%
- Ischemic heart disease35%
- Diabetes34%
Hospitals where Bartlomiej Posnik works
Medicare's Facility Affiliation Data lists Bartlomiej Posnik at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Ascension Seton HaysKyle, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 670056
- Ascension Seton Medical Center AustinAustin, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450056
- Ascension Seton SmithvilleSmithville, TX · Critical Access Hospital · Emergency services: listed by Medicare · CCN 671304
- Columbus Community HospitalColumbus, TX · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 450370
- St David's South Austin Medical CenterAustin, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450713
Practice locations
Addresses where Bartlomiej Posnik is enrolled with Medicare (CMS data updated October 2, 2026).
- 3107 Hwy 71 EBastrop, TX 78602 (512) 308‑9024
- 4101 James Casey St, Suite 100Austin, TX 78745 (512) 447‑2202
Group practices
Medicare enrollment lists Bartlomiej Posnik as a member of this group (CMS data updated October 2, 2026).
- Texas Oncology PA1,014 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
- Medical Oncologyalso
Other hematologist-oncologists in Bastrop
Clinicians with the same Medicare primary specialty in Bastrop, TX — not a recommendation.
Other clinicians in Texas Oncology PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1609286251 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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