57721-3 is a LOINC code used to identify Reason for lab test Nom (DBS) in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Reason for lab test. It is commonly used with the system or sample type Bld.dot.
LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Reason for lab test. It is commonly used with the system or sample type Bld.dot.
When is it used?
Used in lab systems, EHRs, and clinical data exchange.
May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
Status: ACTIVE
Order vs observation: Observation
What it does not mean
The code identifies the observation or test, not the actual result.
Key facts
Reason for lab test in Dried blood spot
Reason for lab test
Definitions of answer codes for reason for newborn screen lab test in dried blood spotInitial Screen: This answer code is used for the first screen performed on an infant after birth. When the first specimen obtained is of unacceptable quality and cannot be used, a replacement specimen is still considered the initial screen. When an initial screen is performed before 24 hrs because of a planned transfusion or an extremely ill infant, it is still considered the initial screen even though it may need to be repeated later. Subsequent screen - required by law: This answer code is used for mandatory second screens as required by law and assumes that the first screen was normal and that the second screen was performed only because it was mandated by law. For example, [give name of state(s)] currently performs a second screen on every infant born in the state at a particular point in time, such as between 1 and 2 weeks. The purpose of identifying the reason for a subsequent screen is that it will change the expected time interval when the subsequent screen should be performed. Subsequent screen - required by protocol: This answer code is used for subsequent screens that are performed because of clinical conditions in the newborn that require a repeat screen as specified by a protocol to assure valid test results. Many of these subsequent screens have abnormal or out-of-range results on the initial screen that can be explained by the clinical condition of the infant. Typical examples include premature infants, infants who receive blood product transfusions, and infants who are receiving intravenous alimentation. This category should not include abnormal tests that should be considered presumptive positives (which would require a diagnostic evaluation rather than a repeat screen by protocol). The purpose of identifying the reason for a subsequent screen is that it will change the expected time interval when the subsequent screen should be performed. Subsequent screen - for clarification of initial results (not by law or protocol): When the results of the initial screen are abnormal or out of range, many states perform an "immediate" repeat screen to confirm the results before considering the test a presumptive positive that will require a diagnostic evaluation. Many of these results may be considered or reported as equivocal or borderline until a clear abnormality is confirmed on the subsequent screen. This category does not include abnormal or borderline results for which there is a clear clinical explanation, such as prematurity, for which there is a clear protocol for obtaining a second screen. The purpose of identifying the reason for a subsequent screen is that it will change the expected time interval when the subsequent screen should be performed. Subsequent screen - reason unknown: The purpose of identifying the reason for a subsequent screen is that it will change the expected time interval when the subsequent screen should be performed. States should use this answer code if they are unable to identify the specific reason for a subsequent screen, but they are able to separate initial screens from subsequent screens. The reason for the second screen might be any of the above. A repeat initial screen because the first specimen was of unacceptable quality should not be considered a subsequent screen, but some states may use this code if they are unable to track that the reason for a second specimen was unacceptable quality of the first screen. No sample collected due to parental refusal: This answer code is used to document parental refusal of newborn screening so that a report can be generated which will contain no test results because no specimen was submitted. This will enable complete matching of newborn screening results to all infants born even if no laboratory testing was performed.
Blood; DBS; Dried blood spot; Filter paper; FP; MISC; Nominal; Point in time; Random; Typ; WB; Whole blood
Where you may see this code
You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.
Common synonyms
Reason for lab test Nom (DBS)Reason for lab test in Dried blood spotReason for lab test DBSReason for lab testMISCReason for lab test, Dried blood spotType
Frequently asked questions
Code details
Code57721-3
SystemLOINC
Display nameReason for lab test Nom (DBS)
DescriptionReason for lab test
Short nameReason for lab test DBS
ComponentReason for lab test
PropertyType
TimingPt
System (specimen)Bld.dot
ScaleNom
ClassMISC
StatusACTIVE
Order/ObservationObservation
Flags
BillableNo
Valid clinical useNo
Source
SourceLOINC
Version2.82
Releasemain
First released2.29
Last changed2.73
Consumer names
Reason for lab test, Dried blood spot
Part names
Reason for lab testTypePtBld.dotNomPoint in time (spot)DBS
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.
