This case-sensitive code system http://terminology.hl7.org/CodeSystem/chromosome-human defines the following codes:

CodeDisplayDefinition
1 chromosome 1chromosome 1.
2 chromosome 2chromosome 2.
3 chromosome 3chromosome 3.
4 chromosome 4chromosome 4.
5 chromosome 5chromosome 5.
6 chromosome 6chromosome 6.
7 chromosome 7chromosome 7.
8 chromosome 8chromosome 8.
9 chromosome 9chromosome 9.
10 chromosome 10chromosome 10.
11 chromosome 11chromosome 11.
12 chromosome 12chromosome 12.
13 chromosome 13chromosome 13.
14 chromosome 14chromosome 14.
15 chromosome 15chromosome 15.
16 chromosome 16chromosome 16.
17 chromosome 17chromosome 17.
18 chromosome 18chromosome 18.
19 chromosome 19chromosome 19.
20 chromosome 20chromosome 20.
21 chromosome 21chromosome 21.
22 chromosome 22chromosome 22.
X chromosome Xchromosome X.
Y chromosome Ychromosome Y.
 <status value="draft"/> <experimental value="false"/> <date value="2020-04-09T21:10:28+00:00"/> <publisher value="Health Level Seven International"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org"/> </telecom> <telecom> <system value="email"/> <value value="hq@HL7.org"/> </telecom> </contact> <description value="Chromosome number for human."/> <copyright value="This material derives from the HL7 Terminology (THO). THO is copyright ©1989+ Health Level Seven International and is made available under the CC0 designation. For more licensing information see: https://terminology.hl7.org/license"/> <caseSensitive value="true"/> <valueSet value="http://terminology.hl7.org/ValueSet/chromosome-human"/> <content value="complete"/> <concept> <code value="1"/> <display value="chromosome 1"/> <definition value="chromosome 1."/> </concept> <concept> <code value="2"/> <display value="chromosome 2"/> <definition value="chromosome 2."/> </concept> <concept> <code value="3"/> <display value="chromosome 3"/> <definition value="chromosome 3."/> </concept> <concept> <code value="4"/> <display value="chromosome 4"/> <definition value="chromosome 4."/> </concept> <concept> <code value="5"/> <display value="chromosome 5"/> <definition value="chromosome 5."/> </concept> <concept> <code value="6"/> <display value="chromosome 6"/> <definition value="chromosome 6."/> </concept> <concept> <code value="7"/> <display value="chromosome 7"/> <definition value="chromosome 7."/> </concept> <concept> <code value="8"/> <display value="chromosome 8"/> <definition value="chromosome 8."/> </concept> <concept> <code value="9"/> <display value="chromosome 9"/> <definition value="chromosome 9."/> </concept> <concept> <code value="10"/> <display value="chromosome 10"/> <definition value="chromosome 10."/> </concept> <concept> <code value="11"/> <display value="chromosome 11"/> <definition value="chromosome 11."/> </concept> <concept> <code value="12"/> <display value="chromosome 12"/> <definition value="chromosome 12."/> </concept> <concept> <code value="13"/> <display value="chromosome 13"/> <definition value="chromosome 13."/> </concept> <concept> <code value="14"/> <display value="chromosome 14"/> <definition value="chromosome 14."/> </concept> <concept> <code value="15"/> <display value="chromosome 15"/> <definition value="chromosome 15."/> </concept> <concept> <code value="16"/> <display value="chromosome 16"/> <definition value="chromosome 16."/> </concept> <concept> <code value="17"/> <display value="chromosome 17"/> <definition value="chromosome 17."/> </concept> <concept> <code value="18"/> <display value="chromosome 18"/> <definition value="chromosome 18."/> </concept> <concept> <code value="19"/> <display value="chromosome 19"/> <definition value="chromosome 19."/> </concept> <concept> <code value="20"/> <display value="chromosome 20"/> <definition value="chromosome 20."/> </concept> <concept> <code value="21"/> <display value="chromosome 21"/> <definition value="chromosome 21."/> </concept> <concept> <code value="22"/> <display value="chromosome 22"/> <definition value="chromosome 22."/> </concept> <concept> <code value="X"/> <display value="chromosome X"/> <definition value="chromosome X."/> </concept> <concept> <code value="Y"/> <display value="chromosome Y"/> <definition value="chromosome Y."/> </concept> </CodeSystem>