Quick answers
- Which hospitals does Robert E. Van Demark Iii work at?
- Medicare's official clinician data lists Robert E. Van Demark Iii at 4 hospitals: Orange City Area Health System, Sanford Chamberlain Medical Center, Sanford Usd Medical Center and Sanford Worthington Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Robert E. Van Demark Iii see patients?
- Medicare's clinician data lists 4 practice locations, including Sioux Falls, SD. Call before your visit to confirm the address.
- What is Robert E. Van Demark Iii's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Robert E. Van Demark Iii accept Medicare assignment?
- Yes. Medicare's clinician data says Robert E. Van Demark Iii 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 Robert E. Van Demark Iii?
- (605) 328-2663, as listed in official Medicare / NPI Registry data.
- What is Robert E. Van Demark Iii's NPI number?
- 1063708915. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Robert E. Van Demark Iii works
Medicare's Facility Affiliation Data lists Robert E. Van Demark Iii at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Orange City Area Health SystemOrange City, IA · Critical Access Hospital · CCN 161360
- Sanford Chamberlain Medical CenterChamberlain, SD · Critical Access Hospital · CCN 431329
- Sanford Usd Medical CenterSioux Falls, SD · Acute Care Hospital · CCN 430027
- Sanford Worthington Medical CenterWorthington, MN · Acute Care Hospital · CCN 240022
Practice locations
Addresses where Robert E. Van Demark Iii is enrolled with Medicare (CMS data updated 2026-10-02).
- 1210 W 18th St, Suite G01Sioux Falls, SD 57104 (605) 328‑2663
- 1301 W 18th StSioux Falls, SD 57105 (605) 312‑2200
- 1305 W 18th StSioux Falls, SD 57105
- 4405 E 26th StSioux Falls, SD 57103
Group practices
Medicare enrollment lists Robert E. Van Demark Iii as a member of this group (CMS data updated 2026-10-02).
- Sanford Medical Center857 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Sioux Falls
Clinicians with the same Medicare primary specialty in Sioux Falls, SD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Creighton University School Of Medicine |
| Graduation year | 2011 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1063708915 |
| 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