D50-D89

Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism

This chapter (Chapter III of the ICD-10-CM) encompasses a wide array of conditions affecting the blood, bone marrow, spleen, lymph nodes, and the immune system. These disorders range from various types of anemias, which impair the blood's ability to carry oxygen, to conditions affecting white blood cells, platelets, and the body's clotting mechanisms, as well as complex immune deficiencies and autoimmune disorders. The codes within this range classify nutritional anemias (D50-D53), hemolytic anemias (D55-D59), aplastic and other anemias, and other bone marrow failure syndromes (D60-D64). It also covers coagulation defects, purpura, and other hemorrhagic conditions (D65-D69), as well as other disorders of blood and blood-forming organs (D70-D77). The latter part of the chapter, D80-D89, is dedicated to certain disorders involving the immune mechanism, including immunodeficiencies, sarcoidosis, and other related conditions. Accurate coding within this chapter requires careful consideration of the specific diagnosis, underlying cause, and any associated complications. For instance, anemias are differentiated by etiology (e.g., iron deficiency, vitamin B12 deficiency, enzyme disorders, autoimmune processes), while immune disorders are classified based on the specific component of the immune system affected (e.g., humoral, cellular, combined deficiencies). This chapter provides the framework for systematic reporting and epidemiological study of these diverse hematological and immunological conditions, ensuring consistency in healthcare data. It is crucial for clinicians and coders to understand the distinctions between specific types of disorders, as these often dictate treatment strategies and patient management. The non-billable nature of the D50-D89 category itself means that a more specific, billable code from within this range must always be selected for claims submission, reflecting the precise diagnosis.

Clinical Symptoms

  • Fatigue
  • Pallor
  • Weakness
  • Shortness of breath
  • Dizziness
  • Increased susceptibility to infections
  • Easy bruising or bleeding
  • Swollen lymph nodes
  • Fever of unknown origin
  • Persistent pain in joints or bones
  • Skin rashes
  • Jaundice
  • Abdominal swelling (due to enlarged spleen or liver)

Common Causes

  • Nutritional deficiencies (e.g., iron, B12, folate)
  • Genetic mutations (e.g., sickle cell disease, thalassemia, hemophilia)
  • Autoimmune disorders (e.g., autoimmune hemolytic anemia)
  • Infections (e.g., HIV, Epstein-Barr virus)
  • Exposure to toxins or radiation
  • Certain medications
  • Chronic diseases (e.g., kidney disease, chronic inflammation, cancer)
  • Bone marrow failure (e.g., aplastic anemia)
  • Unknown (idiopathic) factors

Documentation & Coding Tips

Always specify the type and etiology of anemia. General 'anemia' is insufficient for accurate coding and risk adjustment.

Example: Poor: "Patient presents with fatigue, found to have anemia." Excellent: "Patient presents with chronic fatigue due to severe iron deficiency anemia, confirmed by ferritin <5. Likely related to menorrhagia and malabsorption. Hematology consult placed. Plan: IV iron infusion, dietary counseling, repeat CBC in 2 weeks. This chronic severe iron deficiency anemia (D50.8) significantly impacts patient's functional status, increasing complexity and risk of morbidity, reflecting an increased HCC burden."

Billing Focus: Specific type (iron deficiency, B12 deficiency, etc.), acute vs. chronic, severity (mild, moderate, severe), and underlying cause.

For immune disorders, clearly document the specific type, primary versus secondary, and any associated complications or manifestations.

Example: Poor: "Patient has immunodeficiency." Excellent: "Patient with documented common variable immunodeficiency (CVID) (D83.0), presenting with recurrent bacterial sinusitis requiring multiple antibiotic courses. History of previous bacterial pneumonia. Immunoglobulin G levels are persistently low. Administered IVIG infusion today. Plan: Continue prophylactic antibiotics, monitor Ig levels, pulmonary follow-up. The primary immunodeficiency (CVID) and its recurrent severe infections (J32.0, J18.9) are chronic and contribute to significant overall patient risk and morbidity, impacting multiple organ systems and requiring continuous specialized care. This establishes a clear link between the primary immune disorder and its systemic complications, supporting higher risk adjustment coding (e.g., HCC-relevant infections)."

Billing Focus: Specific diagnosis (e.g., CVID, IgA deficiency), primary vs. secondary, acute exacerbations, related infections or autoimmune manifestations.

When documenting coagulopathies or bleeding disorders, specify if it's inherited or acquired, the specific factor deficiency or platelet disorder, and any acute bleeding episodes or thrombotic events.

Example: Poor: "Patient with a bleeding problem." Excellent: "Patient with known inherited Factor VIII deficiency (Hemophilia A) (D66) presenting with acute hemarthrosis of the right knee (M25.061) following minor trauma. Factor VIII levels are 2%. Administered Factor VIII concentrate. Orthopedic consult obtained. Plan: RICE, pain control, continue Factor VIII prophylaxis. The chronic inherited severe coagulopathy (D66) with acute hemarthrosis is a major risk factor for chronic joint damage and recurrent bleeding episodes, requiring continuous specialized hematologic and orthopedic management, reflecting high risk adjustment considerations."

Billing Focus: Inherited vs. acquired, specific factor, acute vs. chronic, site of bleeding/thrombosis, management (e.g., factor replacement, anticoagulation).

Relevant CPT Codes

Related Diagnoses

Hierarchy