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ICD-9-CM diagnosis code (retired)

861.10 — Unspecified injury of heart with open wound into thorax

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 861.10

861.10 is an ICD-9-CM diagnosis code for unspecified injury of heart with open wound into thorax. 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 S21.309A (Unspecified open wound of unspecified front wall of thorax with penetration into thoracic cavity, initial encounter) and S26.90XA (Unspecified injury of heart, unspecified with or without hemopericardium, 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 861.10

What is the ICD-10 code for ICD-9 861.10?

The GEMs map 861.10 to ICD-10-CM S21.309A and S26.90XA.

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.