Quick answers
- Where does John D. O'Neill see patients?
- Medicare's clinician data lists 2 practice locations, including Katy, TX and Houston, TX. Call before your visit to confirm the address.
- What is John D. O'Neill's specialty?
- Medicare lists Optometry as the primary specialty.
- Does John D. O'Neill accept Medicare assignment?
- Yes. Medicare's clinician data says John D. O'Neill 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 John D. O'Neill?
- (281) 644-2010, as listed in official Medicare / NPI Registry data.
- What is John D. O'Neill's NPI number?
- 1356383525. 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 John D. O'Neill is enrolled with Medicare (CMS data updated 2026-10-02).
- 25242 Kingsland BlvdKaty, TX 77494 (281) 644‑2010
- 650 W Bough Ln, Suite 120Houston, TX 77024 (713) 984‑9144
Group practices
Medicare enrollment lists John D. O'Neill as a member of this group (CMS data updated 2026-10-02).
- Harone, PA5 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Katy
Clinicians with the same Medicare primary specialty in Katy, TX — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | University Of Houston - College Of Optometry |
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1356383525 |
| 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