Mercy Hospital Tishomingo is a 25-bed critical access hospital located at 1000 S. Byrd Street in Tishomingo, Oklahoma, providing 24-hour emergency care, comprehensive diagnostic services, therapy, and outpatient programs to residents of Johnston County and southern Oklahoma for more than 60 years. The hospital has earned the National Rural Health Association’s Top 25 Hospital nationally for six consecutive years and holds two Chartis Center for Rural Health Performance Leadership Awards for 2025. Patients in Johnston County seeking dependable local healthcare will find that gastroenterologist Dr. Gina Sims and Mercy Hospital Tishomingo both represent the same standard of accessible, quality-driven rural care.
Overview of Mercy Hospital Tishomingo
Mercy Hospital Tishomingo is a 25-staffed-bed critical access hospital in Tishomingo, Oklahoma, handling 5,207 emergency department visits and 276 inpatient discharges annually, supported by 9 total providers as of fiscal year 2025.
The hospital operates as a leased facility in partnership with the Chickasaw Nation, a unique arrangement that reflects its deep roots in the community and the shared commitment to health equity for residents of Johnston County and surrounding areas. Tishomingo is the seat of Johnston County and serves as the capital of the Chickasaw Nation, making the hospital a central healthcare anchor for an area with significant tribal health considerations.
According to the National Rural Health Association, critical access hospitals ranked in the top 25 nationally consistently outperform more than 1,300 other rural facilities nationwide on measures of quality, patient perspective, and operational outcomes. Mercy Hospital Tishomingo has held that distinction for six consecutive years.
| Detail | Information |
|---|---|
| Address | 1000 S. Byrd Street, Tishomingo, OK 73460 |
| Phone | (580) 371-2327 |
| Fax | (580) 371-2889 |
| Hospital Type | Critical Access Hospital |
| Staffed Beds | 25 |
| Hours | Open 24 hours, 7 days a week |
| County Served | Johnston County, Oklahoma |
| Partnership | Mercy / Chickasaw Nation (leased facility) |
| NRHA Top 25 Nationally | 6 consecutive years |
| Annual ED Visits (FY2025) | 5,207 |
Medical Services
Mercy Hospital Tishomingo offers emergency care, a full-service laboratory, diagnostic imaging, physical therapy, occupational therapy, speech therapy, outpatient infusions, outpatient radiology, pulmonary function tests, pulmonary rehabilitation, and a swing bed recovery program.
The hospital recently upgraded to a 64-slice GE CT scanner, significantly expanding its diagnostic imaging capabilities and enabling faster, higher-resolution imaging for emergency and outpatient cases. The EPIC electronic health record system integrates Mercy Hospital Tishomingo with all EPIC-based health facilities in the state of Oklahoma, giving providers real-time access to patient records and supporting coordinated care across the state.
According to the Centers for Medicare and Medicaid Services, critical access hospitals provide an indispensable safety net in rural communities, maintaining 24-hour emergency care where residents would otherwise face long travel times to the nearest acute care facility.
- 24/7 emergency department services
- Full-service diagnostic laboratory
- Diagnostic imaging (64-slice GE CT scanner, full range)
- Physical therapy
- Occupational therapy
- Speech therapy
- Outpatient infusion services
- Outpatient laboratory and radiology services
- Pulmonary function testing
- Pulmonary rehabilitation
- Swing bed skilled recovery program
Patients researching comparable Mercy critical access hospitals in Oklahoma may also find profiles of Mercy Hospital Kingfisher and Mercy Hospital Logan County useful for comparison.
Awards and Quality Recognition
Mercy Hospital Tishomingo has earned the National Rural Health Association’s Top 25 Hospital nationally for six consecutive years, a Medicare Quality Award for five consecutive years, and two Chartis Center for Rural Health Performance Leadership Awards for 2025, for both quality and patient perspective.
The Chartis Rural Hospital Performance INDEX evaluates hospitals across multiple pillars including quality outcomes, patient experience, operational efficiency, and financial performance. Earning both the quality and patient perspective leadership awards simultaneously in 2025 places Tishomingo among a very small group of rural hospitals excelling across multiple dimensions of care at once.
The hospital is accredited by the Oklahoma State Department of Health, confirming ongoing compliance with the state’s standards for patient safety, quality of care, and facility operations.
| Award or Recognition | Details |
|---|---|
| NRHA Top 25 Critical Access Hospital — Quality | 6 consecutive years — National Rural Health Association |
| Medicare Quality Award | 5 consecutive years |
| Chartis Performance Leadership — Quality | 2025 — Chartis Center for Rural Health |
| Chartis Performance Leadership — Patient Perspective | 2025 — Chartis Center for Rural Health |
| State Accreditation | Oklahoma State Department of Health |
Swing Bed Program
Mercy Hospital Tishomingo’s swing bed program provides skilled recovery services combining 24-hour nursing care, rehabilitation therapies, and patient education for patients who need extended recovery after an acute hospital stay.
Services delivered through the swing bed program include physical, occupational, and speech therapy alongside IV treatments and wound care management. The program allows patients to remain in their home community during recovery rather than being transferred to a distant skilled nursing facility, which both supports healing and reduces burden on patients and families.
Community Programs
Mercy Hospital Tishomingo provides an average of 30 boxes of food per month for families identified with food insecurities, reflecting the hospital’s commitment to addressing social determinants of health in Johnston County.
Non-emergency, wheelchair-accessible patient transportation services are also available for patients who need assistance getting to and from the hospital. This service removes a significant access barrier common in rural communities where public transportation options are limited and patients may not have reliable personal transportation.
History of Mercy Hospital Tishomingo
Mercy Hospital Tishomingo’s origins trace back to 1960, when Johnston Memorial Hospital opened in Tishomingo, providing Johnston County its first dedicated hospital facility serving southern Oklahoma’s rural communities.
In 2011, Johnston Memorial Hospital entered a management agreement with Mercy and was renamed Tishomingo Hospital. In 2012, the facility transitioned to a leased arrangement and formally became Mercy Hospital Tishomingo, entering its partnership with the Chickasaw Nation that continues today. The Chickasaw Nation, whose tribal capital is Tishomingo, plays an active role in the region’s healthcare infrastructure, and the partnership reflects Mercy’s commitment to serving all patients in the communities where it operates.
The hospital is among 7 percent of healthcare organizations nationwide to have a comprehensive, integrated electronic health record that provides real-time, paperless access to patient information, a standard that has been part of Mercy’s broader technology infrastructure since its early adoption of the EPIC platform.
Visitor Information and Patient Services
Mercy Hospital Tishomingo maintains an open visiting policy with 24/7 access for the Med/Surg floor and general hospital areas, with a two-visitor limit per patient room and supervision requirements for children under 12.
The hospital chapel is open 24 hours a day, seven days a week. The campus is fully smoke-free and vape-free per Joint Commission standards. Language interpretation and hearing assistance services are available at no cost. Free guest WiFi is available on the WiFi@Mercy network.
Appointments can be scheduled by calling (580) 371-2327 or through Mercy’s First Available scheduling tool at mercy.net. The MyMercy patient portal allows patients to view test results, renew prescriptions, and communicate with care teams. Online cost estimates are available through Mercy’s price transparency portal. Non-emergency wheelchair-accessible transportation can be arranged by contacting the hospital directly.
Frequently Asked Questions
What are Mercy Hospital Tishomingo’s hours?
Mercy Hospital Tishomingo is open 24 hours a day, 7 days a week, including emergency services.
What is the phone number for Mercy Hospital Tishomingo?
The main phone number for Mercy Hospital Tishomingo is (580) 371-2327. The fax number is (580) 371-2889.
Where is Mercy Hospital Tishomingo located?
Mercy Hospital Tishomingo is located at 1000 S. Byrd Street, Tishomingo, OK 73460, serving Johnston County in southern Oklahoma.
Has Mercy Hospital Tishomingo won any quality awards?
Yes. It has earned the NRHA Top 25 Critical Access Hospital nationally for six consecutive years, Medicare Quality Award for five consecutive years, and two Chartis Performance Leadership Awards for quality and patient perspective in 2025.
What services does Mercy Hospital Tishomingo offer?
Services include 24-hour emergency care, diagnostic imaging with a 64-slice CT scanner, full laboratory, physical, occupational, and speech therapy, outpatient infusions, pulmonary function testing, pulmonary rehab, and a swing bed program.
What is the swing bed program at Mercy Hospital Tishomingo?
The swing bed program provides skilled recovery care including 24-hour nursing, physical, occupational, and speech therapy, IV treatments, and wound care for patients after an acute hospital stay.
What is Mercy Hospital Tishomingo’s relationship with the Chickasaw Nation?
Yes. Mercy Hospital Tishomingo operates as a leased facility in partnership with the Chickasaw Nation, whose tribal capital is located in Tishomingo.
