Is ICD-10-CM code C66 billable?

No, C66 (Malignant neoplasm of ureter) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code C66 belong to?

C66 belongs to Chapter 2 of the ICD-10-CM tabular list: C00–D49 (Neoplasms).

C66

Non-Billable

ChapterC00–D49

Rankcategory

Description

Malignant neoplasm of ureter

About ICD-10-CM code C66

The ICD-10-CM tabular list places Malignant neoplasm of ureter at code C66, inside C00-D49 Neoplasms, within Malignant neoplasms of urinary tract (C64-C68). You should not submit this code on claims since it lacks billing specificity, use a child code.

Use a more specific code (3 billable)

C66.1Malignant neoplasm of right ureter C66.2Malignant neoplasm of left ureter C66.9Malignant neoplasm of unspecified ureter

Metadata & Insights

•Non-billable category (requires more specific sub-code).
•Chapter 2: Neoplasms (C00-D49).

Instructional Notes

Excludes1(Not coded here. Use a different code.)

malignant neoplasm of ureteric orifice of bladder (C67.6)

Clinical Hierarchy

BillableHas subcodes

CH2Neoplasms (C00-D49)

C64-C68Malignant neoplasms of urinary tract (C64-C68)

C66Malignant neoplasm of ureterNot billable

C66.1Malignant neoplasm of right ureterBillable

C66.2Malignant neoplasm of left ureterBillable

C66.9Malignant neoplasm of unspecified ureterBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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