Quick answers
- Where does Eugene J. Koay see patients?
- Medicare's clinician data lists 3 practice locations, including Houston, TX. Call before your visit to confirm the address.
- What is Eugene J. Koay's specialty?
- Medicare lists Radiation Oncology as the primary specialty.
- Does Eugene J. Koay accept Medicare assignment?
- Yes. Medicare's clinician data says Eugene J. Koay accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Eugene J. Koay?
- (713) 563-9600, as listed in official Medicare / NPI Registry data.
- What is Eugene J. Koay's NPI number?
- 1699011924. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Eugene J. Koay is enrolled with Medicare (CMS data updated 2026-10-02).
- 13900 Katy FwyHouston, TX 77079 (713) 563‑9600
- 1840 Old Spanish TrlHouston, TX 77054 (866) 632‑5782
- 2130 W Holcombe Blvd, Univ of Tx M D Ande Life Sciences PlazaHouston, TX 77030 (713) 592‑5433
Group practices
Medicare enrollment lists Eugene J. Koay as a member of this group (CMS data updated 2026-10-02).
- Physicians Referral Service2,765 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Houston
Clinicians with the same Medicare primary specialty in Houston, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Baylor College Of Medicine |
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699011924 |
| 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 2026-10-02, retrieved 2026-10-29
- 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