Quick answers
- Which hospitals does Upton G. Siddons work at?
- Medicare's official clinician data lists Upton G. Siddons at 3 hospitals: Baptist Health - Fort Smith, Baptist Health Medical Center-Little Rock and Mercy Hospital Fort Smith. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Upton G. Siddons see patients?
- Medicare's clinician data lists 2 practice locations, including Fort Smith, AR and Greenwood, AR. Call before your visit to confirm the address.
- What is Upton G. Siddons's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Upton G. Siddons accept Medicare assignment?
- Yes. Medicare's clinician data says Upton G. Siddons 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 Upton G. Siddons?
- (479) 785-2431, as listed in official Medicare / NPI Registry data.
- What is Upton G. Siddons's NPI number?
- 1871084301. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Upton G. Siddons works
Medicare's Facility Affiliation Data lists Upton G. Siddons at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Baptist Health - Fort SmithFort Smith, AR · Acute Care Hospital · CCN 040055
- Baptist Health Medical Center-Little RockLittle Rock, AR · Acute Care Hospital · CCN 040114
- Mercy Hospital Fort SmithFort Smith, AR · Acute Care Hospital · CCN 040062
Practice locations
Addresses where Upton G. Siddons is enrolled with Medicare (CMS data updated 2026-10-02).
- 1301 S E StFort Smith, AR 72901 (479) 785‑2431
- 1480 W Ctr StGreenwood, AR 72936 (479) 996‑5585
Group practices
Medicare enrollment lists Upton G. Siddons as a member of these groups (CMS data updated 2026-10-02).
- University of Arkansas for Medical Sciences1,175 clinicians in the group
- Baptist Health Services98 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Fort Smith
Clinicians with the same Medicare primary specialty in Fort Smith, AR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2021 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871084301 |
| 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