Quick answers
- Does Dennis A. Tweedy accept Medicare assignment?
- Yes. Medicare's clinician data says Dennis A. Tweedy 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 Dennis A. Tweedy see?
- In 2024, CMS data shows 78 Original Medicare patients and 7,802 services for Dennis A. Tweedy. This counts Original Medicare only and measures volume, not quality.
- What is Dennis A. Tweedy's NPI number?
- 1205874948. 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 Dennis A. Tweedy, 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 | 78 |
|---|---|
| Services billed to Medicare | 7,802 |
| Different services or procedures | 64 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session (G6015)24 services
- Administration of chemotherapy into vein, 1 hour or less (96413)18 services
- Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less (96365)14 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 cholesterol68%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)63%
- Arthritis37%
- Anxiety37%
- Ischemic heart disease36%
Practice locations
Addresses where Dennis A. Tweedy is enrolled with Medicare (CMS data updated October 2, 2026).
- 2410 Round Rock Ave, Suite 150Round Rock, TX 78681 (512) 341‑8724
- 4101 James Casey St, Suite 100Austin, TX 78745 (512) 447‑2202
Group practices
Medicare enrollment lists Dennis A. Tweedy 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 Round Rock
Clinicians with the same Medicare primary specialty in Round Rock, 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 |
|---|---|
| Medical school | University Of Virginia School Of Medicine |
| Graduation year | 1979 (47 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1205874948 |
| 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