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ICD-9-CM diagnosis code (retired)

977.8 — Poisoning by other specified drugs and medicinal substances

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 977.8

977.8 is an ICD-9-CM diagnosis code for poisoning by other specified drugs and medicinal substances. 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 4 ICD-10-CM codes, such as T50.8X1A (Poisoning by diagnostic agents, accidental (unintentional), initial encounter), T50.8X2A (Poisoning by diagnostic agents, intentional self-harm, initial encounter) and T50.8X3A (Poisoning by diagnostic agents, assault, initial encounter). All of these are approximate matches, so review the record to pick the right one.

ICD-10-CM equivalents

Common questions about 977.8

What is the ICD-10 code for ICD-9 977.8?

The GEMs map 977.8 to ICD-10-CM T50.8X1A, T50.8X2A, T50.8X3A and T50.8X4A.

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.