Quick answers
- Which hospitals does William J. Ellison work at?
- Medicare's official clinician data lists William J. Ellison at 4 hospitals: HCA Houston Healthcare Kingwood, Houston Methodist Hospital, Houston Methodist The Woodlands Hospital and Memorial Hermann Northeast Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William J. Ellison see patients?
- Medicare's clinician data lists 7 practice locations, including Lake Jackson, TX, The Woodlands, TX and Humble, TX. Call before your visit to confirm the address.
- What is William J. Ellison's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does William J. Ellison accept Medicare assignment?
- Yes. Medicare's clinician data says William J. Ellison 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 J. Ellison?
- (713) 496-7555, as listed in official Medicare / NPI Registry data.
- What is William J. Ellison's NPI number?
- 1548273154. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William J. Ellison works
Medicare's Facility Affiliation Data lists William J. Ellison at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- HCA Houston Healthcare KingwoodKingwood, TX · Acute Care Hospital · CCN 450775
- Houston Methodist HospitalHouston, TX · Acute Care Hospital · CCN 450358
- Houston Methodist The Woodlands HospitalThe Woodlands, TX · Acute Care Hospital · CCN 670122
- Memorial Hermann Northeast HospitalHumble, TX · Acute Care Hospital · CCN 450684
Practice locations
Addresses where William J. Ellison is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 100 Medical DrLake Jackson, TX 77566 (713) 496‑7555
- 17201 I 45The Woodlands, TX 77385 (281) 737‑2602
- 18951 N Memorial Dr, Greater Houston AnesthesiologyHumble, TX 77338 (281) 540‑7700
- 6565 Fannin StHouston, TX 77030 (713) 620‑4000
- 710 Cypress Creek PkwyHouston, TX 77090 (281) 440‑1000
Group practices
Medicare enrollment lists William J. Ellison as a member of this group (CMS data updated 2026-10-02).
- U S Anesthesia Partners of Texas, PA2,752 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Lake Jackson
Clinicians with the same Medicare primary specialty in Lake Jackson, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical Branch At Galveston |
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548273154 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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