Quick answers
- Which hospitals does Olivia Hillier work at?
- Medicare's official clinician data lists Olivia Hillier at 3 hospitals: Cox Barton County Hospital, Cox Medical Centers and Mercy Hospital Joplin. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Olivia Hillier see patients?
- Medicare's clinician data lists 3 practice locations, including Lamar, MO. Call before your visit to confirm the address.
- What is Olivia Hillier's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Olivia Hillier accept Medicare assignment?
- Yes. Medicare's clinician data says Olivia Hillier 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 Olivia Hillier?
- (417) 681-5100, as listed in official Medicare / NPI Registry data.
- What is Olivia Hillier's NPI number?
- 1942930441. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Olivia Hillier works
Medicare's Facility Affiliation Data lists Olivia Hillier at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cox Barton County HospitalLamar, MO · Critical Access Hospital · CCN 261325
- Cox Medical CentersSpringfield, MO · Acute Care Hospital · CCN 260040
- Mercy Hospital JoplinJoplin, MO · Acute Care Hospital · CCN 260001
Practice locations
Addresses where Olivia Hillier is enrolled with Medicare (CMS data updated 2026-10-02).
- 29 NW 1st LnLamar, MO 64759 (417) 681‑5100
- 29 NW 1st Ln, Attn Medical One Clinic CredentiallingLamar, MO 64759
- 29 NW 1st Ln, Cox Barton County Medical OneLamar, MO 64759 (417) 681‑5266
Group practices
Medicare enrollment lists Olivia Hillier as a member of these groups (CMS data updated 2026-10-02).
- Cox Barton County Hospital28 clinicians in the group
- Barton County Memorial Hospital18 clinicians in the group
- CBCH LLC18 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Lamar
Clinicians with the same Medicare primary specialty in Lamar, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Oakland Univ, William Beaumont School Of Medicine |
| Graduation year | 2022 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942930441 |
| 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