Question 1

Is C91 a billable ICD-10 code?

Accepted Answer

No, C91 is not a billable code. It is a category code that requires additional specificity. You must select a more specific code from the subcategories for billing purposes.

Question 2

What does ICD-10 code C91 mean?

Accepted Answer

ICD-10-CM code C91 represents Lymphoid leukemia. This code is part of the International Classification of Diseases, 10th Revision, Clinical Modification used for medical coding and billing in the United States.

Question 3

When was ICD-10 code C91 introduced?

Accepted Answer

Code C91 has been part of ICD-10-CM since 2016, when the coding system was mandated for use in the United States. This code was included in the original US implementation.

Question 4

What is the parent category for ICD-10 code C91?

Accepted Answer

The parent category for C91 is section:C81-C96 (Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)). This hierarchical classification helps organize related diagnoses for more accurate coding.

Question 5

What conditions are excluded from C91?

Accepted Answer

Code C91 has Type 1 Excludes (mutually exclusive conditions) including: personal history of leukemia (Z85.6). These conditions cannot be coded together with C91 as they represent different diagnoses.

C912026

Excludes11Not coded together

Excludes24Not included here

Notes8Additional information

Related Clinical Codes3Manifestation & etiology relationships

Excluded By4Codes that exclude this one

Is C91 a billable ICD-10 code?

What does ICD-10 code C91 mean?

When was ICD-10 code C91 introduced?

What is the parent category for ICD-10 code C91?

What conditions are excluded from C91?