Cerebral hemorrhage (also termed intracerebral hemorrhage, or ICH) is spontaneous, nontraumatic bleeding directly into the substance of the brain parenchyma, producing an expanding hematoma that compresses, displaces, and ultimately injures adjacent neural tissue. It is distinct from subarachnoid hemorrhage (I60.x), where blood escapes into the space surrounding the brain rather than into the tissue itself, and from subdural hematoma and epidural hematoma (I62.x), which occur between the meninges rather than within the brain parenchyma. The underlying pathophysiology typically involves rupture of small penetrating arterioles chronically weakened by hypertensive lipohyalinosis, cerebral amyloid angiopathy, or vascular structural abnormalities such as arteriovenous malformations and cavernous malformations. Cerebral hemorrhage is invariably pathological and carries significantly higher acute mortality than ischemic stroke — roughly 40-50% at 30 days — and survivors often face permanent neurological deficits coded under the I69.1x sequelae family. In the ICD-10-CM classification, nontraumatic intracerebral hemorrhage is indexed under I61.x, with specificity required for anatomic location (subcortical hemisphere, cortical hemisphere, brainstem, cerebellum, intraventricular, or multiple sites). It is commonly confused with cerebral infarction (I63.x), which results from ischemia rather than hemorrhage, though hemorrhagic conversion of an infarction is coded to I63.- with a “Use Additional” note rather than to I61.x.
Greek -rrhagnynai (rHAG-noo-nye), from rhegnynai (“to break, burst”)
Noun-forming suffix — “bursting forth,” “abnormal discharge or flow”
The compound entered English in the 1660s as cerebral (adjective) from French cérébral, from Latin cerebrum — literally “of the brain.”Hemorrhage entered English in the 1670s from French hémorragie, from Latin haemorrhagia, from Greek haimorrhagia — literally “a bursting forth of blood.” The root haima (“blood”) connects cerebral hemorrhage to the entire -hemia / hemo- root family]: hemoptysis (blood-spitting → coughing up blood), hematemesis (blood-vomiting → vomiting blood), and hematuria (blood-urine → blood in urine). The suffix -rrhage is highly productive in clinical terminology: menorrhagia, otorrhagia, rhinorrhagia — each denoting pathological bleeding from its respective anatomic site.
🔀 ALIASES / ALTERNATE TERMS
Hemorrhagic stroke(the broader clinical term encompassing ICH and subarachnoid hemorrhage; coded separately — subarachnoid hemorrhage maps to I60.x, not I61.x; confirm anatomic source before coding)
Intraparenchymal hemorrhage (IPH)(synonym for intracerebral hemorrhage specifically within brain tissue, as opposed to extraparenchymal spaces; maps identically to I61.x)
Hypertensive intracerebral hemorrhage(most common etiologic subtype; bleeding in basal ganglia, thalamus, pons, or cerebellum classic for hypertensive ICH; no distinct ICD-10-CM hypertensive modifier — code I10 additionally)
Deep ICH(hemorrhage in basal ganglia, thalamus, internal capsule — corresponds to subcortical/deep white matter location; coded I61.0)
Lobar hemorrhage(bleeding confined to a cerebral lobe — frontal, temporal, parietal, occipital; corresponds to cortical/lobar location; coded I61.1; more often associated with cerebral amyloid angiopathy in the elderly)
Brainstem hemorrhage(bleeding into the pons, midbrain, or medulla; coded I61.3; associated with highest acute mortality among ICH subtypes)
Cerebellar hemorrhage(bleeding into the cerebellum; coded I61.4; neurosurgical emergency due to risk of obstructive hydrocephalus)
Intraventricular hemorrhage (IVH)(bleeding into the ventricular system, often secondary extension from parenchymal ICH; coded I61.5; associated with hydrocephalus requiring EVD)
Cerebral amyloid angiopathy (CAA)-related ICH(lobar hemorrhage in elderly patients due to amyloid deposition in vessel walls; no distinct ICD-10-CM code — code I61.1 + I68.0 for cerebral amyloid angiopathy)
Hemorrhagic conversion(transformation of an ischemic infarct into a hemorrhagic lesion; NOT coded to I61.x — code to the cerebral infarction category I63.- with appropriate 7th character or additional code per Official Guidelines)
🔗 RELATED TERMS
cerebral infarction — the ischemic counterpart to cerebral hemorrhage; caused by arterial occlusion rather than rupture (I63.x); distinguished by CT imaging — infarction appears hypodense, hemorrhage hyperdense on noncontrast CT
Subarachnoid hemorrhage — bleeding into the subarachnoid space (between arachnoid and pia mater) rather than into brain parenchyma; most often from aneurysm rupture; coded I60.x, not I61.x
Subdural hematoma — collection of blood between the dura and arachnoid layers; coded I62.0x; extraparenchymal and often traumatic in origin
Hypertension — the single most common cause of nontraumatic ICH (approximately 50-70% of cases); code I10 additionally whenever hypertension is a contributing or underlying condition
Cerebral amyloid angiopathy — age-related amyloid deposition in cortical and leptomeningeal vessels; primary risk factor for lobar ICH in the elderly; coded I68.0
Hematoma — the organized clot that forms within the brain parenchyma after hemorrhage; expansion of the hematoma in the first hours is a key driver of neurological deterioration
Herniation — downward or lateral displacement of brain tissue due to mass effect from the hemorrhage; a life-threatening complication driving emergent surgical intervention
Hydrocephalus — obstruction of CSF flow by intraventricular blood (IVH extension); requires external ventricular drain (EVD) placement; coded G91.1 (obstructive) or G91.3 (post-traumatic NOS if traumatic origin)
Cerebral edema — perilesional swelling surrounding the hematoma; a secondary injury mechanism; coded G93.6 when documented and managed separately
Arteriovenous malformation (AVM) — congenital vascular tangle that can rupture and cause ICH; coded Q28.2; consider querying if ICH occurs in younger patients without hypertension
Coagulopathy — anticoagulant-related ICH (warfarin, DOACs, heparin) is a growing etiology; code the underlying coagulopathy or adverse effect of anticoagulant additionally (e.g., T45.515A for warfarin adverse effect)
CT scan of brain — primary diagnostic tool for acute ICH; noncontrast CT is the gold standard and can detect hemorrhage within minutes of onset
CODING CORNER
🏥 ICD-10-CM CODES
Nontraumatic Intracerebral Hemorrhage (I61.x — Site Specificity Required)
Craniectomy or craniotomy for evacuation of hematoma, supratentorial; intracerebral — primary surgical code for cortical/subcortical ICH requiring open hematoma evacuation
61312
Craniectomy or craniotomy for evacuation of hematoma, supratentorial; extradural or subdural — used when hematoma is supratentorial but outside the parenchyma
61314
Craniectomy or craniotomy for evacuation of hematoma, infratentorial; extradural or subdural — infratentorial (posterior fossa) approach
61315
Craniectomy or craniotomy for evacuation of hematoma, infratentorial; intracerebellar — specific to cerebellar hematoma evacuation
61156
Burr hole(s); with aspiration of hematoma or cyst, intracerebral — minimally invasive aspiration of intraparenchymal hematoma
61154
Burr hole(s) with evacuation and/or drainage of hematoma, extradural or subdural — burr hole approach for extraparenchymal hematoma; do NOT use for intraparenchymal ICH (use 61156 instead)
61108
Twist drill hole(s) for subdural, intracerebral, or ventricular puncture; for evacuation and/or drainage — less invasive than burr hole; for subdural or intraventricular drainage
61322
Craniectomy or craniotomy, decompressive, with or without duraplasty, for treatment of intracranial hypertension, without evacuation of associated intraparenchymal hematoma; without lobectomy
61323
Craniectomy or craniotomy, decompressive, with or without duraplasty, for treatment of intracranial hypertension, without evacuation; with lobectomy
61107
Twist drill hole(s) for subdural, intracerebral, or ventricular puncture; for implanting ventricular catheter or pressure-recording device
MRI brain without and with contrast — advanced neuroimaging for ICH characterization, AVM detection, and hemorrhagic conversion evaluation
⚠️ Coding Note: Site specificity within the I61.x family is required and cannot be assumed — documentation must clearly identify the anatomic location (subcortical vs. cortical hemisphere, brainstem, cerebellum, intraventricular, or multiple sites) before assigning beyond I61.9 (unspecified); when the record is unclear, a query is appropriate targeting location as confirmed on imaging. For inpatient sequencing, I61.x codes serve as the principal diagnosis for the acute hemorrhagic event; sequelae codes (I69.1x) are NOT used during the acute inpatient stay — they apply to subsequent encounters once the acute phase has resolved. A high-value undercoding alert: intraventricular extension of ICH (I61.5) is frequently missed when only the primary parenchymal site is coded — documentation of “IVH,” “ventricular blood,” or “intraventricular extension” in radiology or the H&P should trigger a query or addition of I61.5 alongside the primary site code (I61.6 for multiple localized, or both I61.x + I61.5 per coder judgment and guideline); similarly, NIHSS score documentation should always prompt use of an additional R29.7x code per the I61 category instruction, as this can affect quality reporting. Anticoagulant-related ICH requires additional coding for the drug adverse effect or underdosing status (T45.515x series for warfarin, T45.525x for anticoagulant NOS) — failure to capture this etiology represents a significant CDI opportunity and may affect DRG assignment via CC/MCC capture. All I61.x codes group to MS-DRGs 064/065/066 (Intracranial Hemorrhage or Cerebral Infarction with MCC/CC/without CC-MCC) when no qualifying surgical procedure is performed, or to MS-DRGs 020-022 when an intracranial vascular procedure is the principal operative procedure.
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