LOINC Code 42066-1: Histology ICD-O-1 Cancer
42066-1 is a LOINC code used to identify Histology ICD-O-1 Cancer 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 Histology ICD-O-1. It is commonly used with the system or sample type Cancer.XXX.
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 Histology ICD-O-1. It is commonly used with the system or sample type Cancer.XXX.
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
What it does not mean
- The code identifies the observation or test, not the actual result.
Key facts
- Histology ICD-O-1 Cancer
- Histology ICD-O-1
- Area for retaining the histology portion (4 digits) of the ICD-O-1 or field trial morphology codes entered before a conversion to ICD-O-2. See grouped data item Morph (73-91) ICD-O-1 [1970], in Appendix E. The item name includes years 1973-91. However, some states may have used the codes for cases before 1973... NAACCR Data Standards and Data Dictionary Version 11
- CA; i; Identity or presence; International Classification of Diseases; International Classification of Diseases for Oncology; Misc; Miscellaneous; Nominal; Oncology; Other; Point in time; Random; Spec; To be specified in another part of the message; TUMOR REGISTRY(NAACCR); Unspecified
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
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.