2026 ICD-10-CM Diagnosis Code C82.03Follicular lymphoma grade I, intra-abdominal lymph nodes

ICD-10-CM Codes›C00–D49›C81-C96›C82

ICD-10-CM C82.03
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C82.03 is a billable ICD-10-CM diagnosis code for follicular lymphoma grade I, intra-abdominal lymph nodes. 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.

Code Identity

ICD-10-CM Code
C82.03
Billable Status
Yes — Valid for Submission
Code Describes
Follicular lymphoma grade I, intra-abdominal lymph nodes
Short Description
Follicular lymphoma grade I, intra-abdominal lymph nodes
Same as the full description in the CMS dataset.
Parent Code
C82.0
Follicular lymphoma grade I

Code Classification

ChapterC00–D49Neoplasms
SectionC81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue
CategoryC82Follicular lymphoma
This CodeC82.03Follicular lymphoma grade I, intra-abdominal lymph nodes

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 C82.03 to ICD-9-CMHistory

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

ICD-9-CM
202.03 Nodular lymphoma abdom
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 C82.03Overview

Is C82.03 (Follicular lymphoma grade I) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report follicular lymphoma grade I, intra-abdominal lymph nodes on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does C82.03 group to?

When follicular lymphoma grade I, intra-abdominal lymph nodes 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 C82.03?

Under the General Equivalence Mappings, follicular lymphoma grade I, intra-abdominal lymph nodes converts to ICD-9-CM 202.03 (nodular lymphoma abdom). 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.