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ICD-9-CM diagnosis code (retired)

839.31 — Open dislocation, thoracic vertebra

ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.

About ICD-9-CM 839.31

839.31 is an ICD-9-CM diagnosis code for open dislocation, thoracic vertebra. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.

The CMS General Equivalence Mappings translate it to 2 ICD-10-CM codes, such as S21.209A (Unspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity, initial encounter) and S23.101A (Dislocation of unspecified thoracic vertebra, initial encounter). All of these are approximate matches, so review the record to pick the right one. Some mappings are combinations: more than one ICD-10 code is needed to fully express the ICD-9 code.

ICD-10-CM equivalents

Common questions about 839.31

What is the ICD-10 code for ICD-9 839.31?

The GEMs map 839.31 to ICD-10-CM S21.209A and S23.101A.

GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.