ICD-9-CM Diagnosis Code 991.8
Diagnosis Code: 991.8 (Raw: 9918)
Description: Other specified effects of reduced temperature
Classification: International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM)
Fiscal Year: 2026 Reference
CMS Section 111 Status: Valid for reporting.
Overview & Historical Usage
ICD-9-CM code 991.8 is designated for Other specified effects of reduced temperature. While superseded by ICD-10 for current healthcare encounters, it remains a recognized reference code for CMS Section 111 reporting, legacy claims adjudication, and historical clinical data analysis.