In a hospital lab, we do testing on clinical specimens. A clinical specimen is anything from a patient. Common specimens to test are blood and tissue, but the specimen can be anything — sweat, hair, fingernails. In our lab, the majority of tests are done on blood, urine, tissue, cerebral spinal fluid, or other bodily fluids.

Outpatient lab (blood tests)

701 North Broadway, G-Level – West Wing Entrance
Sleepy Hollow, NY 10591


The Laboratory at Phelps is divided into separate sections, depending on the technology being used or the specific type of testing being done. Clinical Chemistry concentrates on tests done on the fluid portion of blood, as well as some other bodily fluids. Hematology looks at the cellular components of blood and coagulation involved in clotting. Microbiology deals with infectious diseases, which can include diseases caused by bacteria, viruses, fungi, parasites, or tuberculosis. The Blood Bank deals with transfusions. Phlebotomy collects blood specimens for testing. Histology and Cytology deal with anatomic pathology.

Staffed by pathologists, lab technologists and lab technicians, Phelps’ Lab has 40 – 45 full-time employees, and an additional 20 – 25 part-timers. The lab is in operation 24/7. Aside from being able to cross match units of blood and arrange for blood transfusions, the lab is always ready to accept specimens for culture, cardiac enzymes, drug monitoring, and basic testing such as coagulation testing, complete blood count (CBC), electrolytes, and chemistry assays.


A hospital laboratory is an integral part of the hospital, as it is a “service center” that consults with patients’ physicians. History and good communication between the lab and the ordering physician are important. In this regard, hospital labs offer an advantage. The ability to correlate with previous results or with physician clinical information adds a layer of scrutiny beyond all the internal efforts made toward accuracy. If there is any question, problem with the nature of a specimen, or any technical, storage, or transportation problem, there will be rapid communication, and any suspect result will be re-checked.

It is a good idea to keep a record of your lab results for future reference and comparison. If a lab result is normal, filing a copy is sufficient. If a lab result is abnormal, it should be discussed with your physician who might recommend repeating the test or running some additional testing to determine the cause of the abnormality.


The Phelps Laboratory is inspected by New York State Department of Health, The Joint Commission (the lab is surveyed along with the rest of the hospital), the College of American Pathologists, AABB (American Association of Blood Banks), and the FDA. Each agency has a separate focus when it inspects the lab or a portion of it. All of these inspections are performed with an eye toward assuring that laboratories offer the highest possible quality of patient testing.


Outpatient Lab (Blood Tests)
701 North Broadway
G-Level – West Wing Entrance
Sleepy Hollow, NY 10591
(914) 366-3917


Monday, Tuesday, Wednesday, Friday
8 am – 5 pm

8 am – 7 pm

8 am – 12 Noon

8:30 am -12 Noon