2026 ICD-10-CM Diagnosis Code C83.30Diffuse large B-cell lymphoma, unspecified site

ICD-10-CM Codes›C00–D49›C81-C96›C83

ICD-10-CM C83.30
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C83.30 is a billable ICD-10-CM diagnosis code for diffuse large B-cell lymphoma, 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, 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Non-Hodgkin lymphoma.

Code Identity

ICD-10-CM Code
C83.30
Billable Status
Yes — Valid for Submission
Code Describes
Diffuse large B-cell lymphoma, unspecified site
Short Description
Diffuse large B-cell lymphoma, unspecified site
Same as the full description in the CMS dataset.
Parent Code
C83.3
Diffuse large B-cell lymphoma

Code Classification

ChapterC00–D49Neoplasms
SectionC81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue
CategoryC83Non-follicular lymphoma
This CodeC83.30Diffuse large B-cell lymphoma, unspecified site

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Diffuse high grade B-cell lymphoma
  • Diffuse large B-cell lymphoma
  • Diffuse large B-cell lymphoma co-occurrent with chronic inflammation caused by Epstein-Barr virus
  • Diffuse low grade B-cell lymphoma
  • Diffuse malignant lymphoma - centroblastic
  • Diffuse malignant lymphoma - centroblastic polymorphic
  • Diffuse malignant lymphoma - centroblastic-centrocytic
  • Diffuse malignant lymphoma - large cleaved cell
  • Diffuse malignant lymphoma - large non-cleaved cell
  • Diffuse non-Hodgkin's lymphoma, immunoblastic
  • Epstein-Barr virus positive diffuse large B-cell lymphoma of elderly
  • Intravascular large B-cell lymphoma
  • Malignant lymphoma, large cell, polymorphous, immunoblastic
  • Neoplastic sequelae of disorders
  • Nodular high grade B-cell lymphoma
  • Primary cutaneous B-cell lymphoma
  • Primary cutaneous diffuse large cell B-cell lymphoma
  • Reticulosarcoma

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 C83.30 to ICD-9-CMHistory

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

ICD-9-CM
200.00 Retclsrc 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 C83.30Overview

Is C83.30 (Diffuse large B-cell lymphoma) a billable code?

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

What MS-DRG does C83.30 group to?

When diffuse large B-cell lymphoma, unspecified site 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.

What is the ICD-9 equivalent of C83.30?

Under the General Equivalence Mappings, diffuse large B-cell lymphoma, unspecified site converts to ICD-9-CM 200.00 (retclsrc 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.