2026 ICD-10-CM Diagnosis Code D74.8Other methemoglobinemias

ICD-10-CM Codes›D50–D89›D70-D77›D74

ICD-10-CM D74.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D74.8 is a billable ICD-10-CM diagnosis code for other methemoglobinemias. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 811 through 812. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 24 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified hematologic conditions.

Code Identity

ICD-10-CM Code
D74.8
Billable Status
Yes — Valid for Submission
Code Describes
Other methemoglobinemias
Short Description
Other methemoglobinemias
Same as the full description in the CMS dataset.
Parent Code
D74
Methemoglobinemia

Code Classification

ChapterD50–D89Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
SectionD70-D77Other disorders of blood and blood-forming organs
CategoryD74Methemoglobinemia
This CodeD74.8Other methemoglobinemias

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired hemoglobinopathy
  • Acquired methemoglobinemia
  • Drug-induced methemoglobinemia
  • Idiopathic methemoglobinemia
  • Methemoglobinemia due to nitrate poisoning
  • Methemoglobinuria
  • Stokvis' disease
  • Sulfhemoglobinemia
  • Toxic methemoglobinemia with cyanosis
  • Toxic methemoglobinuria

Tabular List NotesGuidance

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

Inclusion Terms

  • Acquired methemoglobinemia (with sulfhemoglobinemia)
  • Toxic methemoglobinemia

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR BLD010
Other specified and unspecified hematologic conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Sulfhemoglobinemia

    a morbid condition due to the presence of sulfmethemoglobin in the blood. it is marked by persistent cyanosis, but the blood count does not reveal any special abnormality in the blood. it is thought to be caused by the action of hydrogen sulfide absorbed from the intestine. (stedman, 25th ed)

  • Toxic Methemoglobinemia with Cyanosis

    blue skin coloration due to elevated blood levels of methemoglobin. the degree of cyanosis is directly correlated to the concentration of methemoglobin in the blood. as methemoglobin is not suitable for carrying oxygen, hypoxemia becomes a serious sequela.

  • Acquired Methemoglobinemia

    methemoglobinemia that is caused by exposure to certain drugs (xylocaine and benzene) and nitrate-rich foods.

Patient EducationClinical

Blood Disorders

Your blood is living tissue made up of liquid and solids. The liquid part, called plasma, is made of water, salts and protein. Over half of your blood is plasma. The solid part of your blood contains red blood cells, white blood cells and platelets.

Read the full article at MedlinePlus

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

Convert D74.8 to ICD-9-CMHistory

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

ICD-9-CM
289.7 Methemoglobinemia
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 D74.8Overview

What is the ICD-10 code for other methemoglobinemias?

The ICD-10-CM code for other methemoglobinemias is D74.8 (sometimes written as D748). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is D74.8 (Methemoglobinemia) a billable code?

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

What MS-DRG does D74.8 group to?

When other methemoglobinemias is the principal diagnosis on an inpatient stay, it groups to MS-DRG 811, 812, with relative weights from 0.9182 to 1.4043 depending on complications. Higher weights mean higher Medicare reimbursement.

Is D74.8 a CC or MCC?

CMS lists D74.8 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 24 closely related codes in its exclusion list.

What is the ICD-9 equivalent of D74.8?

Under the General Equivalence Mappings, other methemoglobinemias converts to ICD-9-CM 289.7 (methemoglobinemia). The mapping is approximate, so confirm the match fits the documentation.