2026 ICD-10-CM Diagnosis Code C86.41Blastic NK-cell lymphoma, in remission

ICD-10-CM Codes›C00–D49›C81-C96›C86

ICD-10-CM C86.41
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C86.41 is a billable ICD-10-CM diagnosis code for blastic NK-cell lymphoma, in remission. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 820 through 825, 840 through 842, 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Non-Hodgkin lymphoma in remission.

Code Identity

ICD-10-CM Code
C86.41
Billable Status
Yes — Valid for Submission
Code Describes
Blastic NK-cell lymphoma, in remission
Short Description
Blastic NK-cell lymphoma, in remission
Same as the full description in the CMS dataset.
Parent Code
C86.4
Blastic NK-cell lymphoma

Code Classification

ChapterC00–D49Neoplasms
SectionC81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue
CategoryC86Other specified types of T/NK-cell lymphoma
This CodeC86.41Blastic NK-cell lymphoma, in remission

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Blastic plasmacytoid dendritic cell neoplasm (BPDCN), in remission

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NEO077
Non-Hodgkin lymphoma in remission
Default principal diagnosis: inpatient Yes · outpatient Yes

Code History & ChangesHistory

Replacement C86.41 replaces the following previously assigned code(s):

  • Z85.72 - Personal history of non-Hodgkin lymphomas
FY 2025AddedAdded to the ICD-10-CM code setEffective October 1, 2024.
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About C86.41Overview

Is C86.41 (Blastic NK-cell lymphoma) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report blastic NK-cell lymphoma, in remission on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does C86.41 group to?

When blastic NK-cell lymphoma, in remission is the principal diagnosis on an inpatient stay, it groups to MS-DRG 820, 821, 822, 823, 824, 825, 840, 841, 842, 974, 975, 976, with relative weights from 0.8945 to 5.8648 depending on complications. Higher weights mean higher Medicare reimbursement.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.