Quick answers
- Which hospitals does William G. Simpson work at?
- Medicare's official clinician data lists William G. Simpson at 3 hospitals: Cherokee Nation W W Hastings Indian Hospital, Logan Health Medical Center and Northeastern Health System. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William G. Simpson see patients?
- Medicare's clinician data lists 1 practice location in Tahlequah, OK. Call before your visit to confirm the address.
- What is William G. Simpson's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does William G. Simpson accept Medicare assignment?
- Yes. Medicare's clinician data says William G. Simpson 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 G. Simpson?
- (918) 456-0641, as listed in official Medicare / NPI Registry data.
- What is William G. Simpson's NPI number?
- 1487655346. 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 G. Simpson works
Medicare's Facility Affiliation Data lists William G. Simpson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cherokee Nation W W Hastings Indian HospitalTahlequah, OK · Acute Care Hospital · CCN 370171
- Logan Health Medical CenterKalispell, MT · Acute Care Hospital · CCN 270051
- Northeastern Health SystemTahlequah, OK · Acute Care Hospital · CCN 370089
Practice locations
Addresses where William G. Simpson is enrolled with Medicare (CMS data updated 2026-10-02).
- 1400 E Downing StTahlequah, OK 74464 (918) 456‑0641
Group practices
Medicare enrollment lists William G. Simpson as a member of this group (CMS data updated 2026-10-02).
- Northeastern Health System103 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Tahlequah
Clinicians with the same Medicare primary specialty in Tahlequah, OK — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Kentucky College Of Medicine |
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487655346 |
| 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