Quick answers
- Does William W. Fan accept Medicare assignment?
- Yes. Medicare's clinician data says William W. Fan 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.
- What is William W. Fan's NPI number?
- 1912991415. 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 W. Fan is enrolled with Medicare (CMS data updated October 2, 2026).
- 625 W Dickey RdGrand Prairie, TX 75051 (972) 262‑4391
Group practices
Medicare enrollment lists William W. Fan as a member of this group (CMS data updated October 2, 2026).
- Med Southwest PLLC229 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Grand Prairie
Clinicians with the same Medicare primary specialty in Grand Prairie, TX — not a recommendation.
Other clinicians in Med Southwest PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | New England College Of Optometry |
| Graduation year | 1993 (33 years since optometry school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1912991415 |
| 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
- 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