ICD-9 Code 266.2 - Other B-complex deficiencies

ICD-9-CM Diagnosis Code 266.2

Diagnosis Code: 266.2 (Raw: 2662)

Description: Other B-complex deficiencies

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 266.2 is designated for Other B-complex deficiencies. While superseded by ICD-10 for current healthcare encounters, it remains a recognized reference code for CMS Section 111 reporting, legacy claims adjudication, and historical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.