Crystal's MCW Coder Hub🧬 ICD-10 CM I69.354 — Hemiplegia and hemiparesis following cerebral infarction affecting left non-dominant side
Billable Code Confirmed
ICD-10 CM I69.354 is a valid, billable 7-character ICD-10-CM code for FY2026. All characters are present. No further specificity is required.
Default Dominance Rule (Left Side)
Per ICD-10-CM Official Coding Guidelines, if a patient presents with left-sided hemiplegia or hemiparesis and the medical record does not specify their handedness or dominance, the default rule requires assigning the non-dominant code1. Therefore, I69.354 is the correct code for left-sided deficits in an ambidextrous patient, a documented right-handed patient, or a patient whose handedness is entirely undocumented.
🔍 Code Description
ICD-10 CM I69.354 classifies the late effects (sequelae) of a cerebral infarction (ischemic stroke) that have resulted in hemiplegia (complete paralysis) or hemiparesis (weakness) on the left, non-dominant side of the body2.
A cerebral infarction occurs when blood flow to a part of the brain is obstructed (e.g., via thrombosis, embolism, or hypoperfusion), leading to tissue death (ischemia). The I69.3- subcategory is exclusively used for sequelae resulting from these ischemic events, distinguishing them from hemorrhagic strokes (such as SAH or ICH).
A condition is considered a sequela if it remains after the acute phase of the stroke has ended. There is no time limit for assigning a sequela code; it can be used for the rest of the patient’s life to describe the residual deficit1.
🌳 Code Tree / Hierarchy
I69 Sequelae of cerebrovascular disease
│
└── I69.3 Sequelae of cerebral infarction ❌ Non-billable
│
└── I69.35 Hemiplegia and hemiparesis following cerebral infarction ❌ Non-billable
├── I69.351 Right dominant side ✅ Billable
├── I69.352 Left dominant side ✅ Billable
├── I69.353 Right non-dominant side ✅ Billable
├── I69.354 LEFT NON-DOMINANT SIDE ◀ THIS CODE ✅ Billable
└── I69.359 Unspecified side ⚠️ Avoid✅ Includes
The following clinical terms and scenarios map to I69.354:
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Left-sided weakness (non-dominant) due to an old ischemic stroke.
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Left-sided paralysis (non-dominant) secondary to a prior middle cerebral artery (MCA) infarction.
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spastic hemiplegia of the left non-dominant side as a late effect of cerebral ischemia.
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Residual left arm/leg weakness from a stroke NOS (when chart review confirms the stroke was ischemic).
❌ Excludes
Excludes 1 — Cannot Be Coded Simultaneously
| Code | Description | Note |
|---|---|---|
| I63.9 | Cerebral infarction, unspecified | Mutually exclusive. Do not code the acute ischemic stroke (I63.- family) concurrently with the sequela code (I69.- family) for the same event1. |
| G81.94 1 | Hemiplegia, unspecified affecting left non-dominant side | Category G81 is excluded when the hemiplegia is explicitly documented as a sequela of cerebrovascular disease. The I69 code alone fully captures both the stroke history and the hemiplegia1. |
| I69.954 | Hemiplegia/hemiparesis following unspecified cerebrovascular disease | Do not use the “unspecified stroke” sequela code if the medical record indicates the original event was an ischemic cerebral infarction. |
📋 Clinical Overview
Pathophysiology
Following a right-hemispheric cerebral infarction (most commonly involving the right middle cerebral artery territory), the death of upper motor neurons in the primary motor cortex or pathways in the internal capsule disrupts the corticospinal tract. Because these motor fibers decussate (cross over) in the medulla, damage to the right side of the brain manifests as motor deficits on the contralateral (left) side of the body 3
Clinical Presentation
Patients coded with I69.354 typically present with:
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Unilateral motor impairment of the left face, arm, and/or leg.
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Upper motor neuron syndrome signs: spasticity (increased muscle tone), hyperreflexia, clonus, and a positive Babinski sign3.
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Cognitive/Language Context: Because the left hemisphere is typically dominant for language, right hemisphere strokes causing left hemiplegia usually spare speech and language centers. However, they are frequently associated with other distinct syndromes, such as left hemispatial neglect, anosognosia (lack of awareness of the deficit), and visual-spatial impairments.
💰 HCC Risk Adjustment (CMS-HCC v28)
| Field | Detail |
|---|---|
| CMS-HCC Model Version | v28 (2024-2026 Implementation) |
| HCC Assignment | HCC 193 |
| HCC Category | Paraplegia and Hemiplegia |
| RAF Coefficient | Subject to demographic variables |
🛠️ CPT & Procedural Crosswalk
While I69.354 is a diagnosis code, it justifies the medical necessity for evaluation, management, and rehabilitative services.
| CPT Code | Description | Clinical Application |
|---|---|---|
| 97110 | Therapeutic procedure, 1 or more areas, each 15 minutes | Physical therapy for gait training and left-sided strengthening. |
| 97530 | Therapeutic activities, direct patient contact | Occupational therapy to improve ADL performance using the paretic left arm. |
| 99214 | E/M established patient, moderate complexity | Routine neurology, PM&R, or primary care follow-up for stroke sequelae. |
| 64640 | Destruction by neurolytic agent; other peripheral nerve | Chemodenervation (Botox) injections for left-sided post-stroke spasticity. |
Billing Botox for Spasticity
If billing 64640 for left-sided spasticity resulting from the stroke, ensure you append the -LT modifier (if required by payer policy for anatomical specificity) and bill the corresponding HCPCS code for the medication supply (e.g., J0585).
💊 Coding Scenarios and Examples
Scenario 1 — Outpatient PM&R Follow-Up
Clinical Vignette: A 62-year-old male follows up in the physical medicine and rehabilitation clinic. He suffered a right MCA territory ischemic stroke 18 months ago. He is right-handed. He currently has residual left-sided hemiparesis and requires a cane for ambulation. He is here for evaluation to renew his physical therapy orders.
ICD-10-CM:
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I69.354 — Hemiplegia and hemiparesis following cerebral infarction, left non-dominant side (Accurately links the specific ischemic etiology with the residual left-sided deficit in a right-handed patient).
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Z47.81 — Encounter for orthopedic aftercare following surgical amputation (Only if applicable—otherwise utilize standard encounter codes or therapy modifiers).
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Scenario 2 — SNF Admission Coding
Clinical Vignette: A 70-year-old female is transferred to a Skilled Nursing Facility (SNF) after a 6-day acute hospital stay for an acute cerebral infarction. Upon admission to the SNF, her acute stroke has stabilized, but she requires extensive physical therapy for left-sided hemiplegia. Handedness is not documented in the transfer summary.
ICD-10-CM:
- I69.354 — Hemiplegia and hemiparesis following cerebral infarction, left non-dominant side (Per guidelines, because she has been discharged from the acute care hospital, the stroke is no longer coded as acute [I63.-]. Since handedness is undocumented, left-sided deficits default to non-dominant).
⚠️ Coding Pitfalls and Tips
| Pitfall or Tip | |
|---|---|
| ❌ | Do not use acute stroke codes (I63.-) in post-acute or outpatient settings once the initial episode of care has concluded. Transition to the I69.- sequelae codes1. |
| ❌ | Do not assign G81.- (Hemiplegia) with I69.354. The I69 code is a combination code that already incorporates the hemiplegic deficit. Assigning both is redundant and triggers edits. |
| ❌ | Do not confuse infarction with hemorrhage. I69.3 is strictly for ischemic strokes (infarctions). If the patient had a bleed (intracerebral hemorrhage), use I69.154 instead. |
| ✅ | Rely on the Default Dominance Rule. If the medical record explicitly states “left hemiplegia due to stroke” but never mentions if the patient is right- or left-handed, you must assign the non-dominant code (I69.354) per ICD-10 guidelines1. |
| ✅ | Code all additional sequelae. A patient can have multiple stroke sequelae. If they also suffer from dysphagia as a result of the same infarction, code I69.391 alongside the hemiplegia code. |
📚 Sources
1 CMS/NCHS. ICD-10-CM Official Guidelines for Coding and Reporting. Section I.C.9.d: Cerebrovascular Disease; Sequelae of Cerebrovascular Disease; Default Dominance/Handedness logic.
2 AAPC & ICD10Data. ICD-10-CM Tabular List of Diseases and Injuries. I69.3 Category instructions.
3 Ropper AH, Samuels MA, Klein JP. Adams and Victor’s Principles of Neurology. Ischemic cerebrovascular disease, middle cerebral artery syndromes, and motor cortex pathophysiology.