2026 ICD-10-CM Diagnosis Code C82.1AFollicular lymphoma grade II, in remission

ICD-10-CM Codes›C00–D49›C81-C96›C82

ICD-10-CM C82.1A
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C82.1A is a billable ICD-10-CM diagnosis code for follicular lymphoma grade II, 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Non-Hodgkin lymphoma in remission.

Code Identity

ICD-10-CM Code
C82.1A
Billable Status
Yes — Valid for Submission
Code Describes
Follicular lymphoma grade II, in remission
Short Description
Follicular lymphoma grade II, in remission
Same as the full description in the CMS dataset.
Parent Code
C82.1
Follicular lymphoma grade II

Code Classification

ChapterC00–D49Neoplasms
SectionC81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue
CategoryC82Follicular lymphoma
This CodeC82.1AFollicular lymphoma grade II, 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 C82.1A 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 C82.1AOverview

Is C82.1A (Follicular lymphoma grade II) a billable code?

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

What MS-DRG does C82.1A group to?

When follicular lymphoma grade II, in remission is the principal diagnosis on an inpatient stay, it groups to MS-DRG 820, 821, 822, 823, 824, 825, 840, 841, 842, with relative weights from 1.0104 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.