Trinity Health System Department of Laboratories currently provides full anatomical and clinical pathology services to hospital in-patients and out-patients of all ages on a 24-hour basis, seven days per week. The Laboratory Department performs necessary biological and chemical test procedures that aid the ordering physician in diagnosis, prognosis, monitoring treatment, and maintenance of his/her patients. All patients are required to have a written physician order for services requested.  Click Here for our laboratory test menu.


Trinity West

4000 Johnson Road
Steubenville, Ohio
Mon-Fri: 6am-6pm, Outpatient Lab
Sat, Sun, Holidays: 6:30am-3pm, Outpatient Lab


Wintersville, Ohio
Monday-Friday: 6:30am to 3:00pm
Saturday: 8am to 12pm

Tri-State Plaza Draw Site

Steubenville, Ohio
Mon-Fri: 7:30am-2pm

Toronto Family Care Center

1800 Franklin Avenue
Toronto, OH 43964
Mon-Thur: 8am-12pm

Calcutta ExpressClinic – Temporarily Closed

Calcutta, Ohio
Mon-Sun: 8am -8pm

Express Clinic

82424 Cadiz-Jewett Road
Cadiz, OH
Mon-Fri: 8am-4pm

Trinity Medical Plaza

106 Plaza Drive
St. Clarisville, OH
Mon-Fri: 7:00 am – 3:30 pm

Trinity Twin City Medical Center

819 N 1st Street
Dennison, OH
Open 24 Hours

Laboratory professionals are the unsung heroes of health care. You don’t often see them, but they are here 24/7. Phlebotomists are trained in the collection and processing of blood specimens. Medical Technicians and Technologists are college educated professionals who specialize in clinical laboratory science. They run the tests, assess the quality of the results and report them. Pathologists are physicians who specialize in laboratory medicine and provide medical leadership to the laboratory, analyze and interpret specialized tests and consult with your physician on the right test to order and the meaning of the results.

Trinity Health System now offers a Comprehensive Blood Draw Analysis Program. This program gives you the opportunity to have a group of blood tests performed for $40.00. Programs of this type are responsible for detecting early signs of health problems and monitoring treatments of known problems. Additional tests are also available for an additional charge. Community blood draws are offered at the following locations during the month.

Trinity Twin City Medical Center

1st Wednesday of the month
819 N. First Street
Dennison, OH


2nd Wednesday of the month
300 Lovers Lane
Steubenville, OH

Express Clinic

3rd Wednesday of the month
82424 Cadiz-Jewett Road
Cadiz, OH

Trinity Medical Plaza

4th Wednesday of the month
106 Plaza Drive
St. Clarisville, OH

Why trust us?

Before we can offer any test, we make sure it is accurate and reliable. Each test is monitored frequently by running specimens with known results called “controls”. The laboratory compares the results of every test we do with those of hundreds of labs in nationwide proficiency testing programs. This laboratory is inspected and accredited by the College of American Pathologists annually.

Most laboratory testing is performed here, but some specialized testing is sent to other labs with expertise in particular tests.

After the testing is complete, the results are reviewed and placed in the computer system. For results that indicate the patient is very ill, the laboratory will call the doctor with the results.

You should ask your physician to explain your lab results to you.

Your doctor may order a lab test for one or more of the following reasons:

  • To confirm a suspected diagnosis
  • To exclude a diagnosis
  • To check effectiveness of treatment
  • To monitor prescription drug levels
  • To screen for a treatable condition

When you provide blood, urine, or other body substances, the technical and professional staff process your sample, test it, and report the results to your doctor. In most cases, your physician will have your test results in 1-2 days. For more specialized tests, it may take a little longer to get results.

How to Obtain Results?

To obtain your test results, please call your physician’s office. The lab cannot communicate results directly to the patient on the phone or in person.

Types of Laboratory Tests

Hematology is the study of the blood cells. There are 3 kinds of cells in the bloodstream:

  • Red Cells transport oxygen from the lungs to other parts of the body.
  • White Cells are vital in fighting infection.
  • Platelets help stop bleeding by forming “plugs” in the vessels.

A CBC measures the total amount of hemoglobin and the total number of red cells, white cells, and platelets.

There are many different kinds of Chemistry tests. Some examples of “routine” chemistry tests are:

  • Glucose is measured for the diagnosis and monitoring of Diabetes Mellitus.
  • BUN/Creatinine are tests of kidney function.
  • Sodium and Potassium are salt balance tests.
  • They are important in people with disease and in those taking diuretics.
  • Bilirubin, Alkaline Phosphatase, ALT, AST and GGT are liver function tests.
  • Total Protein and Albumin provide information about liver function, kidney disease, infection, nutrition, and certain disorders of the antibody-producing cells.
  • TSH and Free T4 detect disorders of the thyroid gland.

Coagulation testing is ordered to rule out a bleeding disorder. Some people take anticoagulants to prevent their blood from clotting too quickly. The PTINR is used to monitor these medications.

The Microbiology lab helps to find what is causing an infection, and how the doctor should treat it. Testing can be done on a wound or sore, blood, urine, or stool. The specimens are smeared on a small plate of agar (a gelatin-like material) and placed in an incubator that is maintained at body temperature. After incubating, the plates are examined for bacterial growth. The technologists determine what types of bacteria are present, and which antibiotics would be best for treatment, usually within two days. For some slowly growing organisms, it may take up to six weeks to get the final results.

Urinalysis is a common evaluation consisting of several chemical tests. These tests help detect diabetes, liver disease, diseases of the kidney and bladder, and some blood disorders and infections. The urine may also be examined under a microscope to confirm findings.


Department of Laboratories
4000 Johnson Road
Steubenville, Ohio 43952
Phone: 740.264.8185
Fax: 740.264.8649