🧬 ICD-10 CM I69.311 — Memory Deficit Following Cerebral Infarction
Billable Code Confirmed
ICD-10 CM I69.311 is a complete 7-character code combining category I69 (sequelae of cerebrovascular disease), the .31 cognitive-deficit subcategory, and the final “1” character specifying memory deficit, giving it full billing specificity with no further characters required.
Non-Billable Parent Codes
I69.31 (Cognitive deficits following cerebral infarction) is a category header that lacks the sixth character identifying which specific cognitive domain is affected, making it invalid for claims submission. I69.3 (Sequelae of cerebral infarction) is even less specific, covering the entire family of post-infarction residual effects without distinguishing motor, cognitive, or speech domains.
Clinical Context
Code Classification
This is a diagnosis code (ICD-10-CM), used to report a residual condition following a resolved cerebral infarction; it is never a procedure code and carries no associated ICD-10-PCS equivalent of its own.
🔍 Code Description
ICD-10 CM I69.311 captures a persistent memory impairment that remains after the acute phase of an ischemic stroke has resolved, distinguishing it from active or evolving neurological deficits still under acute management. The code sits within the I69 sequelae family, which CMS created specifically to separate late-effect residual conditions from acute cerebrovascular events coded under I63 categories, allowing more precise tracking of long-term stroke morbidity. Clinically, the memory deficit may be anterograde, retrograde, or both, and is typically documented through formal neuropsychological testing, a Montreal Cognitive Assessment (MoCA), or a Mini-Mental State Examination (MMSE) rather than by clinical impression alone.
Accurate assignment requires the physician to explicitly link the memory deficit to the prior cerebral infarction, since payers and CDI auditors frequently query charts where a stroke history and a memory complaint appear on the same encounter without a clear causal statement. When the documentation instead points to a broader neurocognitive syndrome — for example vascular dementia — coders should evaluate whether F01.51 or a related dementia code is more appropriate in addition to, or instead of, I69.311, since dementia codes carry their own MEAT and HCC implications distinct from a pure sequela code. This code family also interacts with I69.310 and I69.312 when a patient has multiple documented cognitive domains affected, which is common after larger territory infarcts and often warrants multiple codes rather than a single “combined” selection.
🌳 Code Tree / Hierarchy
I69.3 Sequelae of cerebral infarction ❌ Non-billable
│
├── I69.30 Unspecified sequelae of cerebral infarction ✅ Billable
├── I69.31 Cognitive deficits following cerebral infarction ❌ Non-billable
│ │
│ ├── I69.310 Attention and concentration deficit following cerebral infarction ✅ Billable
│ ├── I69.311 Memory deficit following cerebral infarction ◀ THIS CODE ✅ Billable
│ ├── I69.312 Visuospatial deficit and spatial neglect following cerebral infarction ✅ Billable
│ ├── I69.313 Psychomotor deficit following cerebral infarction ✅ Billable
│ ├── I69.314 Frontal lobe and executive function deficit following cerebral infarction ✅ Billable
│ ├── I69.315 Cognitive social or emotional deficit following cerebral infarction ✅ Billable
│ ├── I69.318 Other symptoms/signs involving cognitive functions following cerebral infarction ✅ Billable
│ └── I69.319 Unspecified symptoms/signs involving cognitive functions following cerebral infarction ✅ Billable
│
└── I69.32 Speech and language deficits following cerebral infarction ❌ Non-billable
Specificity Drives Defensible Coding
Tip
✅ Includes
Memory loss occurring as a residual effect of a prior cerebral infarction, once the acute stroke episode has resolved. Both short-term and long-term memory impairment attributable to the vascular event, when specifically documented as such by the provider. Post-stroke amnestic syndrome, when the treating physician attributes the amnesia to the antecedent infarction rather than to an unrelated or superimposed condition.
❌ Excludes
Excludes 1
Z86.73 — Personal history of cerebral infarction without residual deficit is mutually exclusive with I69.311 because it explicitly documents the absence of any residual condition, whereas I69.311 requires an active, ongoing deficit. Sequelae of traumatic intracranial injury (S06.- family) are excluded because the causal mechanism for I69.311 must be cerebrovascular/ischemic, not traumatic, even if the resulting memory deficit looks clinically similar.
Danger
Excludes 2
F06.7 (Mild neurocognitive disorder due to known physiological condition) may be coded alongside I69.311 when formal neuropsychiatric testing supports an independent DSM-based diagnosis on top of the stroke-sequela finding, since the two codes describe different clinical constructs even when they share an underlying cause.
📋 Clinical Overview
Domain-Specific Cognitive Sequela Selection
Post-stroke cognitive deficits rarely present as a single isolated domain, which is why the I69.31 subcategory was built with granular sixth characters rather than one combined code. The table below contrasts I69.311 with its two most frequently co-documented siblings to clarify which clinical findings support each selection.
| Feature | I69.311 | I69.310 | I69.314 |
|---|---|---|---|
| Primary deficit | Impaired encoding, storage, or recall of information, typically confirmed by delayed-recall testing on formal neuropsych evaluation. | Reduced sustained or selective attention and difficulty concentrating on tasks, often identified through digit-span or continuous-performance testing. | Impaired planning, judgment, and self-monitoring, generally localized to frontal lobe circuitry and confirmed through executive-function batteries. |
| Typical testing tool | MoCA delayed recall subscore, RAVLT, or formal neuropsychological memory battery. | Trail Making Test Part A, digit span forward/backward. | Trail Making Test Part B, Wisconsin Card Sorting Test, clock-drawing test. |
| Documentation risk | Frequently under-coded when providers write “forgetful” without a formal causal link to the prior infarct. | Frequently conflated with generalized fatigue or delirium rather than a stable stroke sequela. | Frequently missed entirely, since impaired judgment may be attributed to mood or behavioral issues instead. |
Important
A CDI query is warranted whenever a provider documents “cognitive decline” or “forgetfulness” post-stroke without specifying the affected domain, since this vague language cannot support I69.311 or any of its siblings without follow-up clarification.
Manifestations & Symptom Burden
Difficulty recalling recent conversations or newly learned information, often noticed first by family members rather than the patient. Repeated questions or statements within a short time frame, reflecting impaired short-term retention. Difficulty with recall of autobiographical or historical information predating the stroke, when retrograde memory is also affected. Reduced ability to learn and retain new skills or routines during inpatient rehabilitation, directly affecting therapy planning.
Tip
💰 HCC Risk Adjustment
ICD-10 CM I69.311 is not confirmed as an HCC-mapped code under the current CMS-HCC V28 model based on available crosswalk data, in contrast to the motor-deficit hemiplegia/[hemiparesis] codes in the I69.35x family, which are established HCC 103 contributors.² Because HCC mappings are revised annually and CMS-HCC V28 significantly narrowed the list of risk-adjusting codes compared to V24, coders working Medicare Advantage claims should re-verify this code’s status against the current-year official crosswalk rather than assuming non-mapped status is permanent. If the patient’s chart also supports a distinct dementia or mild neurocognitive disorder diagnosis, that code is the more reliable RAF driver and should be pursued through CDI query when clinically supported.
🏥 MS-DRG Assignment
ICD-10 CM I69.311 groups within DRG 056 (Degenerative nervous system disorders with MCC) or DRG 057 (Degenerative nervous system disorders without MCC), depending on whether a qualifying MCC is also present on the same claim.³ As a sequela code rather than an acute-event code, I69.311 does not independently trigger a CC/MCC designation, so DRG weight is driven by other diagnoses coded alongside it. When I69.311 is sequenced as principal diagnosis — for example, an admission specifically for cognitive rehabilitation — the coder should ensure the causal cerebral infarction is fully resolved and not still under active acute treatment, since an active infarct would instead require an I63 code as principal diagnosis with I69.311 sequenced secondarily if at all.
🔗 Related ICD-10-CM Codes
Other cognitive-deficit sequela codes: I69.310, I69.312, I69.313, I69.314, I69.315, I69.318, I69.319
Related stroke-sequela and cognitive-disorder codes: I69.320, I69.30, F06.7, Z86.73
🛠️ Commonly Associated CPT Codes
- 96116 — Neurobehavioral status exam, first hour, commonly billed when the memory deficit is first formally characterized through standardized testing to support the I69.311 diagnosis.
- 96121 — Each additional 30 minutes of neurobehavioral status exam, used when testing extends beyond the initial hour captured by 96116.
- 97129 — Therapeutic interventions for cognitive function development, frequently billed during inpatient rehabilitation stays targeting the documented memory deficit.
- 97130 — Each additional 15 minutes of cognitive function intervention beyond the first unit captured by 97129.
- 99483 — Cognitive assessment and care planning, applicable when a comprehensive care plan is developed specifically around the patient’s post-stroke cognitive impairment.
NCCI Bundling Considerations
CPT 96116/96121 and 97129/97130 represent distinct service types — standardized testing versus therapeutic intervention — and are not bundled under NCCI edits when performed and documented separately on the same date of service. However, 99483 should not be billed alongside a full neurobehavioral status exam on the same encounter without clear documentation distinguishing the care-planning service from the diagnostic testing service, since payers may view overlapping time and effort as duplicative.
🔬 ICD-10-PCS Crosswalk
- F07Z8ZZ — Cognitive Skills Development using Interactive Feedback, commonly reported for inpatient rehabilitation sessions targeting memory retraining.
- F07Z9ZZ — Vocational Skills Development, applicable when memory deficits impact work-readiness training during a rehabilitation stay.
- F07ZBZZ — Cognitive Skills Development using Other Equipment, used for structured memory rehabilitation activities not captured by the interactive-feedback code.
💊 Coding Scenarios and Examples
Scenario 1: A 68-year-old male is admitted three months post-ischemic stroke for inpatient rehabilitation, with formal neuropsych testing confirming isolated short-term memory impairment and no other cognitive domain affected.
- Correct coding: I69.311 as principal diagnosis, with 97129 and 97130 for the cognitive rehabilitation sessions provided. Sequencing places I69.311 first since the admission’s primary purpose is treatment of the memory deficit itself, with the resolved causal infarct not separately coded as an acute event.
Scenario 2: A 74-year-old female with a remote stroke history is admitted for an unrelated hip fracture repair, and the history and physical notes both memory impairment and mild attention deficit dating back to her stroke.
- Correct coding: I69.311 and I69.310 are both coded as secondary diagnoses alongside the principal fracture and procedure codes, since both cognitive domains are separately documented and affect the patient’s inpatient care and discharge planning. A CDI note should confirm the treating team addressed both deficits during this stay, since simply listing them in the history without any bearing on current care may not support code assignment.
Scenario 3: A 59-year-old patient is admitted with acute confusion, and the note documents “history of stroke, now forgetful” without formal testing or a clear causal statement.
- Correct coding: hold off on I69.311 pending a CDI query, since vague documentation without domain-specific testing or explicit causal language does not meet the specificity threshold for this code family. Once the query returns a confirmed memory-deficit diagnosis linked to the prior infarct, I69.311 can be added.
⚠️ Coding Pitfalls and Tips
Do not assign I69.311 based solely on a stroke history plus a vague complaint of “forgetfulness” — formal documentation linking the memory deficit to the prior infarct is required. Do not default to the unspecified I69.319 when the provider has documented memory specifically as the affected domain; specificity always takes priority over the catch-all code. Do not code Z86.73 and I69.311 together, since the history code explicitly requires the absence of residual deficit. Remember that I69.311 and other cognitive sequela codes can be reported in combination when multiple domains are independently documented — they are not mutually exclusive. Watch for cases where a dementia diagnosis such as F01.51 is more clinically accurate than a simple memory-deficit sequela code, and query the provider when documentation is ambiguous between the two.