LOINC Code 81891-4: Episode of care secondary diagnosis

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 Episode of care diagnosis.secondary. It is commonly used with the system or sample type ^Patient.

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

• Episode of care secondary diagnosis
• Episode of care diagnosis.secondary
• The episode of care secondary diagnosis code includes all of the billing codes except for the first one listed on the claim form for the most recent visit in a given episode of care. This term was created for, but is not limited in use to, the the American Physical Therapy Association's Physical Therapy Outcomes Registry, for which the diagnosis code will almost always be reported using ICD-10-CM.
• CLIN; Dx; Dx.secondary; EOC; EOC dx.secondary; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Nominal; Point in time; Random

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