Quick answers
- Where does William R. Butler see patients?
- Medicare's clinician data lists 2 practice locations, including Round Rock, TX. Call before your visit to confirm the address.
- What is William R. Butler's specialty?
- Medicare lists Optometry as the primary specialty.
- Does William R. Butler accept Medicare assignment?
- Yes. Medicare's clinician data says William R. Butler 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 William R. Butler?
- (512) 828-5500, as listed in official Medicare / NPI Registry data.
- What is William R. Butler's NPI number?
- 1144436767. 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 William R. Butler is enrolled with Medicare (CMS data updated 2026-10-02).
- 1150 Ih 35, Suite 500Round Rock, TX 78681
- 1150 Ih 35 N, 500 W. Ryan Butler OD PLLC Tso of RoundRound Rock, TX 78681 (512) 828‑5500
Specialties
- Optometryprimary
Other optometrists in Round Rock
Clinicians with the same Medicare primary specialty in Round Rock, TX — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | University Of Houston - College Of Optometry |
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1144436767 |
| 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