Chapter 9

I00–I99: Diseases of the Circulatory System

Diseases of the Circulatory System diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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.-)
Internal Codes
  • I69.262

    Other paralytic syndrome following other nontraumatic intracranial hemorrhage affecting left dominant side

  • I69.263

    Other paralytic syndrome following other nontraumatic intracranial hemorrhage affecting right non-dominant side

  • I69.264

    Other paralytic syndrome following other nontraumatic intracranial hemorrhage affecting left non-dominant side

  • I69.265

    Other paralytic syndrome following other nontraumatic intracranial hemorrhage, bilateral

  • I69.269

    Other paralytic syndrome following other nontraumatic intracranial hemorrhage affecting unspecified side

  • I69.290

    Apraxia following other nontraumatic intracranial hemorrhage

  • I69.291

    Dysphagia following other nontraumatic intracranial hemorrhage

  • I69.292

    Facial weakness following other nontraumatic intracranial hemorrhage

  • I69.293

    Ataxia following other nontraumatic intracranial hemorrhage

  • I69.298

    Other sequelae of other nontraumatic intracranial hemorrhage

  • I69.30

    Unspecified sequelae of cerebral infarction

  • I69.310

    Attention and concentration deficit following cerebral infarction

  • I69.311

    Memory deficit following cerebral infarction

  • I69.312

    Visuospatial deficit and spatial neglect following cerebral infarction

  • I69.313

    Psychomotor deficit following cerebral infarction

  • I69.314

    Frontal lobe and executive function deficit following cerebral infarction

  • I69.315

    Cognitive social or emotional deficit following cerebral infarction

  • I69.318

    Other symptoms and signs involving cognitive functions following cerebral infarction

  • I69.319

    Unspecified symptoms and signs involving cognitive functions following cerebral infarction

  • I69.320

    Aphasia following cerebral infarction

  • I69.321

    Dysphasia following cerebral infarction

  • I69.322

    Dysarthria following cerebral infarction

  • I69.323

    Fluency disorder following cerebral infarction

  • I69.328

    Other speech and language deficits following cerebral infarction

  • I69.331

    Monoplegia of upper limb following cerebral infarction affecting right dominant side

  • I69.332

    Monoplegia of upper limb following cerebral infarction affecting left dominant side

  • I69.333

    Monoplegia of upper limb following cerebral infarction affecting right non-dominant side

  • I69.334

    Monoplegia of upper limb following cerebral infarction affecting left non-dominant side

  • I69.339

    Monoplegia of upper limb following cerebral infarction affecting unspecified side

  • I69.341

    Monoplegia of lower limb following cerebral infarction affecting right dominant side

  • I69.342

    Monoplegia of lower limb following cerebral infarction affecting left dominant side

  • I69.343

    Monoplegia of lower limb following cerebral infarction affecting right non-dominant side

  • I69.344

    Monoplegia of lower limb following cerebral infarction affecting left non-dominant side

  • I69.349

    Monoplegia of lower limb following cerebral infarction affecting unspecified side

  • I69.351

    Hemiplegia and hemiparesis following cerebral infarction affecting right dominant side

  • I69.352

    Hemiplegia and hemiparesis following cerebral infarction affecting left dominant side

  • I69.353

    Hemiplegia and hemiparesis following cerebral infarction affecting right non-dominant side

  • I69.354

    Hemiplegia and hemiparesis following cerebral infarction affecting left non-dominant side

  • I69.359

    Hemiplegia and hemiparesis following cerebral infarction affecting unspecified side

  • I69.361

    Other paralytic syndrome following cerebral infarction affecting right dominant side

  • I69.362

    Other paralytic syndrome following cerebral infarction affecting left dominant side

  • I69.363

    Other paralytic syndrome following cerebral infarction affecting right non-dominant side

  • I69.364

    Other paralytic syndrome following cerebral infarction affecting left non-dominant side

  • I69.365

    Other paralytic syndrome following cerebral infarction, bilateral

  • I69.369

    Other paralytic syndrome following cerebral infarction affecting unspecified side

  • I69.390

    Apraxia following cerebral infarction

  • I69.391

    Dysphagia following cerebral infarction

  • I69.392

    Facial weakness following cerebral infarction

  • I69.393

    Ataxia following cerebral infarction

  • I69.398

    Other sequelae of cerebral infarction

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