Anemia in chronic diseases classified elsewhere (D63) ICD-10-CM
The D63 code range covers anemia in chronic diseases classified elsewhere with 4 ICD-10-CM diagnosis codes. 3 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the D63 Range 4 codes · 3 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the D63 range.
Drug Resistance
Diminished or failed response of an organism, disease or tissue to the intended effectiveness of a chemical or drug. It should be differentiated from DRUG TOLERANCE which is the progressive diminution of the susceptibility of a human or animal to the effects of a drug, as a result of continued administration.
Drug Resistance, Bacterial
The ability of bacteria to resist or to become tolerant to chemotherapeutic agents, antimicrobial agents, or antibiotics. This resistance may be acquired through gene mutation or foreign DNA in transmissible plasmids (R FACTORS).
Drug Resistance, Fungal
The ability of fungi to resist or to become tolerant to chemotherapeutic agents, antifungal agents, or antibiotics. This resistance may be acquired through gene mutation.
Drug Resistance, Microbial
The ability of microorganisms, especially bacteria, to resist or to become tolerant to chemotherapeutic agents, antimicrobial agents, or antibiotics. This resistance may be acquired through gene mutation or foreign DNA in transmissible plasmids (R FACTORS).
Drug Resistance, Multiple
Simultaneous resistance to several structurally and functionally distinct drugs.
Drug Resistance, Multiple, Bacterial
The ability of bacteria to resist or to become tolerant to several structurally and functionally distinct drugs simultaneously. This resistance may be acquired through gene mutation or foreign DNA in transmissible plasmids (R FACTORS).
Drug Resistance, Multiple, Fungal
The ability of fungi to resist or to become tolerant to several structurally and functionally distinct drugs simultaneously. This resistance phenotype may be attributed to multiple gene mutations.
Drug Resistance, Multiple, Viral
The ability of viruses to resist or to become tolerant to several structurally and functionally distinct drugs simultaneously. This resistance phenotype may be attributed to multiple gene mutation.
Drug Resistance, Neoplasm
Resistance or diminished response of a neoplasm to an antineoplastic agent in humans, animals, or cell or tissue cultures.
Drug Resistance, Viral
The ability of viruses to resist or to become tolerant to chemotherapeutic agents or antiviral agents. This resistance is acquired through gene mutation.
Drug Tolerance
Progressive diminution of the susceptibility of a human or animal to the effects of a drug, resulting from its continued administration. It should be differentiated from DRUG RESISTANCE wherein an organism, disease, or tissue fails to respond to the intended effectiveness of a chemical or drug. It should also be differentiated from MAXIMUM TOLERATED DOSE and NO-OBSERVED-ADVERSE-EFFECT LEVEL.
About the D63 Code Range
The ICD-10 code D63 and its subcodes are used to classify anemia that occurs as a result of chronic diseases found elsewhere in a patient’s medical record. These codes specifically cover anemia linked to underlying health conditions, rather than anemia as a primary disorder.
For example, D63.0 refers to anemia caused by neoplastic diseases, such as anemia in ovarian carcinoma or hemolytic anemia related to malignant tumors. The code D63.1 is used for anemia associated with chronic kidney disease, including cases requiring erythropoietin treatment or linked to various stages of renal failure. Meanwhile, D63.8 covers anemia resulting from other chronic illnesses like endocrine disorders (thyroid, adrenal, pituitary dysfunction), metabolic disorders, AIDS, or chronic infections. These synonyms help medical coders accurately select the correct ICD-10 code for conditions like "anemia of chronic disease," "anemia secondary to renal failure," or "anemia of endocrine disorder." Understanding these distinctions is essential when assigning the ICD-10 code for anemia in chronic diseases, ensuring precise documentation and coding tailored to the patient’s underlying condition.
Questions About This Page
How many billable codes are in the D63 range?
Of the 4 codes in this range, 3 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 D63 range classify?
The range classifies anemia in chronic 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.
