Quick answers
- Does Gillis G. Schwartz accept Medicare assignment?
- Yes. Medicare's clinician data says Gillis G. Schwartz 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 Gillis G. Schwartz see?
- In 2024, CMS data shows 749 Original Medicare patients and 1,165 services for Gillis G. Schwartz. This counts Original Medicare only and measures volume, not quality.
- What is Gillis G. Schwartz's NPI number?
- 1912438276. 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 Gillis G. Schwartz, 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 | 749 |
|---|---|
| Services billed to Medicare | 1,165 |
| Different services or procedures | 34 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Ct scan of abdomen and pelvis with contrast (74177)337 services
- Ct scan of chest with contrast (71260)305 services
- X-ray of abdomen, 1 view (74018)69 services
- Complete ultrasound scan behind abdominal cavity (76770)42 services
- Ultrasound study of one arm or leg veins with compression and maneuvers (93971)39 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 cholesterol73%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)61%
- Arthritis51%
- Anxiety36%
- Diabetes35%
Practice locations
Addresses where Gillis G. Schwartz is enrolled with Medicare (CMS data updated October 2, 2026).
- 1515 Holcombe BlvdHouston, TX 77030 (713) 792‑2121
Group practices
Medicare enrollment lists Gillis G. Schwartz as a member of this group (CMS data updated October 2, 2026).
- Physicians Referral Service2,765 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Houston
Clinicians with the same Medicare primary specialty in Houston, TX — not a recommendation.
Other clinicians in Physicians Referral Service
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2017 (9 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1912438276 |
| 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