Lithuanian Laboratory Implementation Guide, published by Lithuanian Medical Library. This guide is not an authorized publication; it is the continuous build for version 0.0.1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7LT/ig-lt-lab/ and changes regularly. See the Directory of published versions

• Narrative Content
• XML
• JSON

: IHC Expression Level

Draft as of 2026-03-29

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<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="ihc-expression-level"/>
  <language value="en"/>
  <text>
    <status value="generated"/>
    <div xml:lang="en" lang="en"><hr/><p><b>English</b></p><hr/><p class="res-header-id"><b>Generated Narrative: CodeSystem ihc-expression-level</b></p><a name="ihc-expression-level"> </a><a name="hcihc-expression-level"> </a><div style="display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%"><p style="margin-bottom: 0px">Language: en</p></div><p>This case-sensitive code system <code>https://tx.hl7.lt/fhir/CodeSystem/ihc-expression-level</code> defines the following codes:</p><table class="codes"><tr><td style="white-space:nowrap"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style="white-space:nowrap">negative<a name="ihc-expression-level-negative"> </a></td><td>Negative</td><td>No expression detected</td></tr><tr><td style="white-space:nowrap">weak<a name="ihc-expression-level-weak"> </a></td><td>Weak (+)</td><td>Weak expression (+)</td></tr><tr><td style="white-space:nowrap">moderate<a name="ihc-expression-level-moderate"> </a></td><td>Moderate (++)</td><td>Moderate expression (++)</td></tr><tr><td style="white-space:nowrap">strong<a name="ihc-expression-level-strong"> </a></td><td>Strong (+++)</td><td>Strong expression (+++)</td></tr></table></div>
  </text>
  <url value="https://tx.hl7.lt/fhir/CodeSystem/ihc-expression-level"/>
  <version value="0.0.1"/>
  <name value="IhcExpressionLevelLtLab"/>
  <title value="IHC Expression Level"/>
  <status value="draft"/>
  <experimental value="true"/>
  <date value="2026-03-29T11:59:27+00:00"/>
  <publisher value="Lithuanian Medical Library"/>
  <contact>
    <name value="Lithuanian Medical Library"/>
    <telecom>
      <system value="url"/>
      <value value="https://medicinosnk.lt"/>
    </telecom>
    <telecom>
      <system value="email"/>
      <value value="info@medicinosnk.lt"/>
    </telecom>
  </contact>
  <description
               value="Immunohistochemical expression level classification for receptor status assessment."/>
  <jurisdiction>
    <coding>
      <system value="urn:iso:std:iso:3166"/>
      <code value="LT"/>
    </coding>
  </jurisdiction>
  <caseSensitive value="true"/>
  <content value="complete"/>
  <count value="4"/>
  <concept>
    <code value="negative"/>
    <display value="Negative"/>
    <definition value="No expression detected"/>
  </concept>
  <concept>
    <code value="weak"/>
    <display value="Weak (+)"/>
    <definition value="Weak expression (+)"/>
  </concept>
  <concept>
    <code value="moderate"/>
    <display value="Moderate (++)"/>
    <definition value="Moderate expression (++)"/>
  </concept>
  <concept>
    <code value="strong"/>
    <display value="Strong (+++)"/>
    <definition value="Strong expression (+++)"/>
  </concept>
</CodeSystem>