2026 ICD-10-CM Diagnosis Code K75.81Nonalcoholic steatohepatitis (NASH)

ICD-10-CM Codes›K00–K95›K70-K77›K75

ICD-10-CM K75.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K75.81 is a billable ICD-10-CM diagnosis code for nonalcoholic steatohepatitis (NASH). It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 441 through 443. Coders also document this condition as metabolic dysfunction-associated steatohepatitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Noninfectious hepatitis.

Code Identity

ICD-10-CM Code
K75.81
Billable Status
Yes — Valid for Submission
Code Describes
Nonalcoholic steatohepatitis (NASH)
Short Description
Nonalcoholic steatohepatitis (NASH)
Same as the full description in the CMS dataset.
Parent Code
K75.8
Other specified inflammatory liver diseases

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK70-K77Diseases of liver
CategoryK75Other inflammatory liver diseases
This CodeK75.81Nonalcoholic steatohepatitis (NASH)

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Metabolic dysfunction-associated steatohepatitis
  • Metabolic dysfunction-associated steatotic liver disease
  • Steatohepatitis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Metabolic dysfunction-associated steatohepatitis (MASH)

Use Additional Code

  • code, if applicable, hepatic fibrosis K74.0

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.

    • Steatohepatitis(nonalcoholic) (NASH)
    • Steatohepatitis(nonalcoholic) (NASH)
      • metabolic dysfunction-associated steatohepatitis (MASH)

Clinical ClassificationClinical

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

CCSR DIG023
Noninfectious hepatitis
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Fatty Liver Disease

Your liver is the largest organ inside your body. It helps your body digest food, store energy, and remove poisons. Fatty liver disease is a condition in which fat builds up in your liver. There are two main types:

The full article covers:

  • What is fatty liver disease?
  • What is nonalcoholic fatty liver disease (NAFLD)?
  • What is alcoholic fatty liver disease?
  • Who is at risk for fatty liver disease?
  • What are the symptoms of fatty liver disease?
  • How is fatty liver disease diagnosed?
  • What are the treatments for fatty liver disease?
  • What are some lifestyle changes that can help with fatty liver disease?

Read the full article at MedlinePlus

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

Convert K75.81 to ICD-9-CMHistory

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

ICD-9-CM
571.8 Chronic liver dis NEC
Approximate The match is approximate rather than exact.
ICD-9-CM
573.3 Hepatitis NOS
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 K75.81Overview

Is K75.81 (Other specified inflammatory liver diseases) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report nonalcoholic steatohepatitis (NASH) on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K75.81 group to?

When nonalcoholic steatohepatitis (NASH) is the principal diagnosis on an inpatient stay, it groups to MS-DRG 441, 442, 443, with relative weights from 0.6997 to 1.7947 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K75.81?

Under the General Equivalence Mappings, nonalcoholic steatohepatitis (NASH) converts to ICD-9-CM 571.8 (chronic liver dis NEC) and 573.3 (hepatitis NOS). 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.