2026 ICD-10-CM Diagnosis Code C82.90Follicular lymphoma, unspecified, unspecified site

ICD-10-CM Codes›C00–D49›C81-C96›C82

ICD-10-CM C82.90
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C82.90 is a billable ICD-10-CM diagnosis code for follicular lymphoma, unspecified, unspecified site. 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. Coders also document this condition as follicular lymphoma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Non-Hodgkin lymphoma.

Code Identity

ICD-10-CM Code
C82.90
Billable Status
Yes — Valid for Submission
Code Describes
Follicular lymphoma, unspecified, unspecified site
Short Description
Follicular lymphoma, unspecified, unspecified site
Same as the full description in the CMS dataset.
Parent Code
C82.9
Follicular lymphoma, unspecified

Code Classification

ChapterC00–D49Neoplasms
SectionC81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue
CategoryC82Follicular lymphoma
This CodeC82.90Follicular lymphoma, unspecified, unspecified site

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Follicular lymphoma
  • Follicular non-Hodgkin's lymphoma in situ
  • Follicular non-Hodgkin's lymphoma of soft tissue
  • Pediatric follicular lymphoma

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Brill-Symmers' disease

Clinical ClassificationClinical

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

CCSR NEO058
Non-Hodgkin lymphoma
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Lymphoma

Lymphoma is a cancer of a part of the immune system called the lymph system. There are many types of lymphoma. One type is Hodgkin disease. The rest are called non-Hodgkin lymphomas.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert C82.90 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
202.00 Ndlr lym unsp xtrndl org
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About C82.90Overview

Is C82.90 (Follicular lymphoma, unspecified) a billable code?

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

What MS-DRG does C82.90 group to?

When follicular lymphoma, unspecified, unspecified site 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.

What is the ICD-9 equivalent of C82.90?

Under the General Equivalence Mappings, follicular lymphoma, unspecified, unspecified site converts to ICD-9-CM 202.00 (ndlr lym unsp xtrndl org). The mapping is approximate, so confirm the match fits the documentation.

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.