Other disorders of blood and blood-forming organs in diseases classified elsewhere (D77) ICD-10-CM
The D77 code range covers other disorders of blood and blood-forming organs in diseases classified elsewhere with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
- underlying disease, such as:
- amyloidosis E85
- congenital early syphilis A50.0
- echinococcosis B67.0 B67.9
- malaria B50.0 B54
- schistosomiasis [bilharziasis] B65.0 B65.9
- vitamin C deficiency E54
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the D77 Range 1 codes · 1 billable
- D77 Other disorders of blood and blood-forming organs in diseases classified elsewhere
About the D77 Code Range
The ICD-10 code D77 is used to classify various blood and blood-forming organ disorders that arise due to other underlying diseases. This code captures conditions that don’t have a primary blood disorder diagnosis but result from different illnesses affecting the blood.
This section includes disorders like secondary cytopenia (a reduction in blood cell counts caused by another disease), lymphoid system findings, hyperreactive malarial splenomegaly syndrome (an abnormal spleen enlargement linked to malaria), and autoimmune reactions triggered by infectious diseases. Medical coders looking for the ICD-10 code for autoimmune blood reactions or related secondary hematologic conditions will find D77 applies when blood problems are not primary but connected to another illness. This differentiation helps ensure accurate documentation and supports appropriate treatment planning for complex cases involving blood abnormalities tied to other diseases.
Questions About This Page
How many billable codes are in the D77 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the D77 range classify?
The range classifies other disorders of blood and blood-forming organs in diseases classified elsewhere. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
