LOINC Code 85505-6: Presumptive Rh Molgen Nom (Sal)

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Rh.presumptive. It is commonly used with the system or sample type Saliva.

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: Both
• Method: Molgen

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• Presumptive Rh [Type] in Saliva (oral fluid) by Molecular genetics method
• Rh.presumptive
• The presumptive (predicted) Rh factor for the D antigen (Rh positive or Rh negative) based on genetic analysis of the RHD gene. Hematopoietic stem cell transplant donor registries often collect samples from potential donors using buccal swabs or saliva (both described as "saliva" in the LOINC term) as part of enrolling them in the registry. Because these samples do not contain fresh intact red blood cells (RBCs) and traditional serological RhD blood group typing cannot be done, molecular typing is performed as part of the screening process to find an appropriate hematopoietic stem cell donor. Prior to transfusion or transplantation, the presumptive Rh factor result based on molecular typing must be confirmed using traditional serologic typing. This term was created for, but not limited in use to, the submitter's lab that performs sequence analysis of select exons in the RHD gene and predicts the RhD phenotype from the resulting DNA sequence.
• BLOOD BANK; D phenotyping; D typing; Molecular genetics; Nominal; Oral fluid; PCR; Point in time; Random; Rh phenotyping; Rh typing; Sal; Typ

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

Frequently asked questions