ICD-10 Code C81.90: Hodgkin Lymphoma, Unspecified – Complete Coding & Billing Guide
What Does ICD-10 Code C81.90 Mean? ICD-10 code C81.90 designates Hodgkin lymphoma when neither the histologic subtype nor the anatomic site of involvement can be determined from available clinical documentation. This code represents a valid, billable diagnosis under the ICD-10-CM classification system for malignant neoplasms of lymphoid, hematopoietic, and related tissue. C81.90 functions as the […]
ICD-10 Code C79.89: Secondary Malignant Neoplasm of Other Specified Sites – Complete Coding & Billing Guide
What Does ICD-10 Code C79.89 Mean? ICD-10 code C79.89 identifies a secondary malignant neoplasm — meaning metastatic cancer — located at a specified anatomical site that is not individually enumerated elsewhere in the C79 category. This is a valid, billable diagnosis code under the ICD-10-CM classification system and applies exclusively to patients with a documented […]
ICD-10 Code B96.2: E. coli as the Cause of Diseases Classified Elsewhere – Complete Coding & Billing Guide
ICD-10-CM code B96.2 identifies Escherichia coli [E. coli] as the causative bacterial agent in an infectious disease that is classified and coded under a different ICD-10 chapter. It is a non-billable header code — meaning it cannot be submitted on a claim as written. Coders must assign one of its five specific subcodes (B96.20–B96.29) to […]
ICD-10 Code B95.6: Staphylococcus Aureus as the Cause of Diseases Classified Elsewhere – Complete Coding & Billing Guide
ICD-10 code B95.6 identifies Staphylococcus aureus as the causative organism behind a disease or infection coded elsewhere in the classification. It sits within Section B95–B97 (Bacterial and Viral Infectious Agents) and functions exclusively as a secondary, supplemental code — never as a standalone or principal diagnosis. Critically for coders: B95.6 itself is a non-billable header […]
ICD-10 Code B37.2: Candidiasis of Skin and Nail – Complete Coding & Billing Guide
ICD-10-CM code B37.2 designates candidiasis of skin and nail — a fungal infection caused by Candida species (most commonly Candida albicans) affecting the integumentary system. This is a billable, valid diagnosis code for fiscal year 2026, effective October 1, 2025, under the ICD-10-CM Official Coding Guidelines published by CMS and the National Center for Health […]
ICD-10 Code A69.20: Lyme Disease, Unspecified – Complete Coding & Billing Guide
What Does ICD-10 Code A69.20 Mean? ICD-10 code A69.20 designates Lyme disease, unspecified — a billable diagnosis code used when a provider confirms or strongly suspects Lyme disease (infection by Borrelia burgdorferi) but available documentation does not identify a specific disease stage, organ system manifestation, or complication. The code falls under category A69.2 (Lyme disease) […]
ICD-10 Code A53.9: Syphilis, Unspecified – Complete Coding & Billing Guide
ICD-10 code A53.9 identifies a confirmed syphilis infection caused by the bacterium Treponema pallidum when the specific stage or type of the disease cannot be determined from the available clinical documentation. Coders apply this code only when stage-specific codes in the A50–A52 categories are not supported by the medical record — it is the last […]