2026 ICD-10-CM Diagnosis Code C81.90Hodgkin lymphoma, unspecified, unspecified site

ICD-10-CM Codes›C00–D49›C81-C96›C81

ICD-10-CM C81.90
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C81.90 is a billable ICD-10-CM diagnosis code for hodgkin 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Hodgkin lymphoma.

Code Identity

ICD-10-CM Code
C81.90
Billable Status
Yes — Valid for Submission
Code Describes
Hodgkin lymphoma, unspecified, unspecified site
Short Description
Hodgkin lymphoma, unspecified, unspecified site
Same as the full description in the CMS dataset.
Parent Code
C81.9
Hodgkin lymphoma, unspecified

Code Classification

ChapterC00–D49Neoplasms
SectionC81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue
CategoryC81Hodgkin lymphoma
This CodeC81.90Hodgkin lymphoma, unspecified, unspecified site

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Classical Hodgkin lymphoma
  • Composite Hodgkin and non-Hodgkin lymphoma
  • Hodgkin's disease
  • Hodgkin's disease affecting skin
  • Hodgkin's disease in remission
  • Hodgkin's granuloma
  • Hodgkin's sarcoma
  • Hypermelanosis due to Hodgkin's disease
  • Hypermelanosis due to neoplasia
  • Lymphomatoid papulosis
  • Lymphomatoid papulosis with Hodgkin's disease
  • Malignant lymphoma in remission
  • Non-specific cutaneous reaction in Hodgkin's disease
  • Primary cutaneous CD30 antigen positive T-cell lymphoproliferative disorder
  • Refractory Hodgkin's lymphoma
  • Relapsing classical Hodgkin lymphoma

Clinical ClassificationClinical

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

CCSR NEO057
Hodgkin lymphoma
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Lymphomatoid Papulosis

    clinically benign, histologically malignant, recurrent cutaneous t-cell lymphoproliferative disorder characterized by an infiltration of large atypical cells surrounded by inflammatory cells. the atypical cells resemble reed-sternberg cells of hodgkin disease or the malignant cells of cutaneous t-cell lymphoma. in some cases, lymphomatoid papulosis progresses to lymphomatous conditions including mycosis fungoides; hodgkin disease; cutaneous t-cell lymphoma; or anaplastic large-cell lymphoma.

  • Hodgkin's Sarcoma

    an obsolete term referring to a hodgkin lymphoma that lacks inflammatory elements.

Patient EducationClinical

Hodgkin Lymphoma

Hodgkin lymphoma, also called Hodgkin disease, is a type of cancer that develops in the lymph system. Your lymph system is part of your immune system. It helps protect your body from infection and disease.

The full article covers:

  • What is Hodgkin lymphoma?
  • What causes Hodgkin lymphoma?
  • Who is more likely to develop Hodgkin lymphoma?
  • What are the symptoms of Hodgkin lymphoma?
  • How is Hodgkin lymphoma diagnosed?
  • What are the treatments for Hodgkin lymphoma?

Read the full article at MedlinePlus

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

Convert C81.90 to ICD-9-CMHistory

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

ICD-9-CM
201.90 Hdgk dis 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 C81.90Overview

Is C81.90 (Hodgkin lymphoma, unspecified) a billable code?

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

What MS-DRG does C81.90 group to?

When hodgkin 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 C81.90?

Under the General Equivalence Mappings, hodgkin lymphoma, unspecified, unspecified site converts to ICD-9-CM 201.90 (hdgk dis 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.