ICD-10-CM tabular list

Chapter 9: Diseases of the circulatory system

I00-I99

Chapter 9 of the ICD-10-CM tabular list covers diseases of the circulatory system, codes I00-I99. It holds 1,798 codes across 10 blocks, of which 1,427 are billable and 371 are header codes that cannot go on a claim.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
systemic connective tissue disorders (M30-M36)
transient cerebral ischemic attacks and related syndromes (G45.-)

Risk adjustment in Chapter 9

795 of this chapter’s codes map to a CMS-HCC, which means the diagnosis carries a risk-adjustment payment when it is documented and coded to the level the record supports.

HCC 267 Deep Vein Thrombosis and Pulmonary Embolism
HCC 383 Chronic Ulcer of Skin, Except Pressure, Not Specified as Through to Bone or Muscle
HCC 263 Atherosclerosis of Arteries of the Extremities with Ulceration or Gangrene
HCC 254 Monoplegia, Other Paralytic Syndromes
HCC 249 Ischemic or Unspecified Stroke
HCC 264 Vascular Disease with Complications

Excludes2 — not included here, but may coexist

Risk adjustment in Chapter 9

Blocks in this chapter