ICD-10-CM 2027 diagnosis code

D74Methemoglobinemia

Not billable — use a more specific code

D74 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About D74

D74 is the ICD-10-CM diagnosis code for methemoglobinemia. It belongs to block D70-D77 (other disorders of blood and blood-forming organs) and chapter 3 (diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: D74.0 (methemoglobinemia), D74.8 (methemoglobinemias) and D74.9 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under D74

Notes that apply from higher levels

Instructions written at a parent level also apply to D74.

Broader instructions also apply from Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.

Codes whose notes reference D74

D58.2Excludes1

Code history

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2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about D74

Is D74 billable?: No. D74 is a header code. Report one of its more specific subcodes instead.