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Chapter 9

Diseases of the circulatory system

I00–I99

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FY 2027 effective October 1, 2026 · 80 categories in this chapter

Blocks in This Chapter

ICD-10-CM groups this chapter's categories into 10 blocks of three-character categories.

  1. I00 –I02 Acute rheumatic fever
  2. I05 –I09 Chronic rheumatic heart diseases
  3. I10 –I1A Hypertensive diseases
  4. I20 –I25 Ischemic heart diseases
  5. I26 –I28 Pulmonary heart disease and diseases of pulmonary circulation
  6. I30 –I5A Other forms of heart disease
  7. I60 –I69 Cerebrovascular diseases
  8. I70 –I79 Diseases of arteries, arterioles and capillaries
  9. I80 –I89 Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
  10. I95 –I99 Other and unspecified disorders of the circulatory system

Categories

Acute rheumatic fever (I00-I02)

Chronic rheumatic heart diseases (I05-I09)

Hypertensive diseases (I10-I1A)

Ischemic heart diseases (I20-I25)

Pulmonary heart disease and diseases of pulmonary circulation (I26-I28)

Other forms of heart disease (I30-I5A)

Cerebrovascular diseases (I60-I69)

Diseases of arteries, arterioles and capillaries (I70-I79)

Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89)

Other and unspecified disorders of the circulatory system (I95-I99)