Crystal's Coder Hub🫀 ICD-10 CM Z86.73 — Personal History of Transient Ischemic Attack (TIA), and Cerebral Infarction Without Residual Deficits
Billable Code Confirmed
ICD-10 CM Z86.73 is a valid, billable 5-character ICD-10-CM for FY2026. The structure is straightforward: the category Z86 identifies personal history of certain other diseases, and the full 5-character code adds the specific history of TIA or cerebral infarction without residual deficits. No additional characters are required.
Non-Billable Parent Codes — Never Submit These
- ❌
Z86— 3-character header — too nonspecific; it does not identify the condition history being documented.- ❌
Z86.7— 4-character header — still a parent category; it does not specify the TIA/cerebral infarction history.Always submit Z86.73 when the documentation supports a personal history of TIA or cerebral infarction and there are no residual deficits.
Clinical Context: History Without Residual Deficits
ICD-10 CM Z86.73 captures a past cerebrovascular event with no current neurologic sequelae. It is the correct choice when the chart documents prior TIA, prior cerebral infarction, or history of stroke, but the patient does not have active deficits that would place them in the I69.- sequela category.
Code Classification
ICD-10 CM Diagnosis Code — wRVU, assistant payable, and global period fields are not applicable. Use this code to document history and clinical context, not an active stroke diagnosis.
🔍 Code Description
ICD-10 CM Z86.73 classifies personal history of transient ischemic attack (TIA), and cerebral infarction without residual deficits. This is a history code used when the cerebrovascular event is no longer active and the patient has recovered without documented late effects.
This code is commonly used in outpatient follow-up, primary care, cardiology, neurology, and rehabilitation contexts to show prior vascular risk. If the patient has persistent weakness, aphasia, dysphagia, hemiparesis, gait abnormality, or other stroke-related deficits, then a code from I69.- is more appropriate than Z86.73.
🌳 Code Tree / Hierarchy
Z00-Z99 Factors influencing health status and contact with health services ❌ Non-billable as a parent range
│
├── Z80-Z87 Persons with potential health hazards related to family and personal history and certain conditions influencing health status
│ │
│ ├── Z86 Personal history of certain other diseases ❌ Non-billable parent code
│ │
│ ├── Z86.7 Personal history of diseases of the circulatory system ❌ Non-billable parent code
│ │
│ └── Z86.73 Personal history of transient ischemic attack (TIA), and cerebral infarction without residual deficits ◀ THIS CODE ✅ Billable
│
└── Other Z codes as applicable
Specificity Matters Here
Use Z86.73 when the chart says the patient has a history of stroke or TIA but no residual deficits are present. If the documentation instead shows current neurologic deficits from the old event, code from I69.- rather than this history code.
✅ Includes
The following clinical terms and scenarios map to Z86.73 when documented:
- Personal history of transient ischemic attack.
- Personal history of cerebral infarction without residual deficits.
- Personal history of stroke NOS without residual deficits.
- Personal history of PRIND.
❌ Excludes
Excludes 1 — Cannot Be Coded Simultaneously with Z86.73
| Code | Description | Note |
|---|---|---|
| I69.- | Sequelae of cerebrovascular disease | Use when residual deficits from the prior stroke/TIA are present; do not use Z86.73 for sequelae. |
Excludes 1 Violation Risk
A common error is coding Z86.73 when the patient still has hemiparesis, aphasia, dysphagia, gait impairment, or other residual findings from the prior cerebrovascular event. Those findings support I69.-, not a history code.
Excludes 2 — May Be Coded in Addition if Separately Present
| Code | Description | Note |
|---|---|---|
| I25.2 | Old myocardial infarction | May coexist as a separate historical cardiovascular condition. |
| Z87.820 | Personal history of traumatic brain injury | May be reported if separately documented and relevant. |
📋 Clinical Overview
History vs Active Sequelae
Z86.73 is a history code, so the key question is whether the prior neurologic event is still producing current impairment. If the event is past and the patient has returned to baseline, this code fits. If there are lasting deficits, the sequela coding pathway is the correct one.
| Feature | Z86.73 — History Only | I69.- — Sequelae |
|---|---|---|
| Current deficits | Absent | Present |
| Event status | Prior event, resolved | Prior event with lasting effect |
| Typical chart language | “History of stroke,” “prior TIA,” “no residual deficits” | “Residual hemiparesis,” “late effect of stroke,” “post-stroke aphasia” |
| Coding purpose | Documents history/risk context | Captures active sequela burden |
Query Trigger
If the record says “history of stroke” but also mentions weakness, speech deficit, dysphagia, gait abnormality, or other neurologic problems, a query may be needed to determine whether the patient truly has no residual deficits.
Common Presenting Contexts
- Primary care follow-up: Used to document cerebrovascular history during routine chronic disease management.
- Neurology surveillance: Used when the prior TIA/stroke is referenced as part of vascular risk review.
- Preoperative evaluation: Helps identify elevated cerebrovascular risk history before surgery.
- Rehabilitation history: Appropriate when the stroke event is remote and deficits have resolved.
Coding Manifestations
Always code the active neurologic deficit when one exists. Examples include:
💰 HCC Risk Adjustment (CMS-HCC v28)
| Field | Detail |
|---|---|
| CMS-HCC Model Version | v28 (2024-2025 Implementation) |
| HCC Assignment | N/A — not an active disease code |
| HCC Category | N/A |
| RAF Coefficient | N/A |
Z86.73 is a history code and does not function like an active chronic disease code for risk-adjustment capture. It is still clinically important because it documents prior cerebrovascular disease and can influence care planning, but it should not be treated as a substitute for a current condition code.
Capture Accurately
Report Z86.73 only when the record supports a true history of TIA or cerebral infarction without residual deficits. Do not use it to represent a current stroke, and do not use it when residual deficits are present.
🏥 DRG Assignment
N/A — history code only
| DRG | Title | Est. Relative Weight* |
|---|---|---|
| N/A | Not a DRG-driving diagnosis by itself | N/A |
*Not applicable. History codes do not independently group into an MS-DRG.
Sequencing and Context
🔗 Related ICD-10-CM Codes
History and Sequelae Variants
| Code | Description |
|---|---|
| Z86.73 | Personal history of transient ischemic attack (TIA), and cerebral infarction without residual deficits ← This Code |
| I69.- | Sequelae of cerebrovascular disease |
| G45.9 | Transient cerebral ischemic attack, unspecified |
| I63.- | Cerebral infarction |
Common History Codes
| Code | Description |
|---|---|
| Z87.820 | Personal history of traumatic brain injury |
| I25.2 | Old myocardial infarction |
| Z86.718 | Personal history of other venous thrombosis and embolism |
🛠️ Commonly Associated CPT Codes
Follow-Up and Risk Review Context
Z86.73 is often attached to evaluation and management visits rather than procedures. The history supports medical necessity and risk review, but it does not by itself create a procedure code relationship.
| CPT Code | Description | Profee Coding Notes (Modifier 26) |
|---|---|---|
| 99213 | Office or other outpatient visit, established patient | Common follow-up visit level when the history is reviewed and managed. |
| 99214 | Office or other outpatient visit, established patient | Often used when vascular history contributes to moderate complexity. |
| 99397 | Periodic comprehensive preventive medicine re-evaluation | May include review of cerebrovascular history during wellness care. |
| 99497 | Advance care planning | Sometimes paired when vascular history prompts goals-of-care discussion. |
NCCI Bundling Considerations
- There are no direct NCCI procedure bundling edits for Z86.73 because it is a diagnosis code, not a procedure code.
🔬 ICD-10-PCS Crosswalk (Inpatient Procedures)
When Z86.73 is documented in an inpatient chart, it is usually part of the patient’s past medical history rather than a procedure driver.
| PCS Section | Body System | Root Operation | Clinical Application |
|---|---|---|---|
| N/A | N/A | N/A | No direct ICD-10-PCS equivalent; the code documents history only. |
💊 Coding Scenarios and Examples
Scenario 1 — Outpatient Follow-Up
Clinical Vignette: A 74-year-old woman is seen by her primary care provider for hypertension and lipid follow-up. Her chart lists a prior TIA from 2021, and she has no weakness, speech difficulty, or other residual neurologic findings. The provider documents “history of TIA, no residual deficits.”
ICD-10-CM | Secondary Diagnoses | Additional Codes:
- Z86.73 — Personal history of TIA without residual deficits.
Scenario 2 — Preoperative Clearance
Clinical Vignette: A 68-year-old man presents for preoperative evaluation before elective knee surgery. He reports a remote ischemic stroke ten years ago with full recovery and no ongoing neurologic symptoms. The clinician documents “personal history of cerebral infarction without residual deficits.”
Principal Diagnosis:
- Z86.73 — History of cerebral infarction without residual deficits.
Secondary Diagnoses:
Scenario 3 — CDI Query
Clinical Vignette: A chart lists “history of stroke” in the assessment, but the patient also reports chronic right-sided weakness and uses a cane. The note does not clarify whether the weakness is a residual deficit from the stroke or due to another condition.
Action / Outcome: A CDI query should ask whether the patient has residual deficits from the prior cerebrovascular event. If yes, assign an I69.- code. If no, Z86.73 remains appropriate.
Query Response: Provider clarifies: “History of prior stroke with residual right hemiparesis.”
Corrected ICD-10-CM Coding:
- I69.351 — Hemiplegia and hemiparesis following cerebral infarction affecting right dominant side.
- I63.- — Only if the stroke is current, not historical.
⚠️ Coding Pitfalls and Tips
| Pitfall or Tip | |
|---|---|
| ❌ | Using Z86.73 when residual deficits are present. If any late effect from the stroke remains, the correct path is I69.-, not a history code. |
| ❌ | Coding a current stroke when the event is historical. Acute stroke codes are not appropriate for resolved events without active findings. |
| ✅ | Use Z86.73 for resolved TIA/stroke history. This keeps the chart accurate and avoids overcalling active cerebrovascular disease. |
| ✅ | Query when documentation is vague. “History of stroke” alone is not enough if neurologic findings are present. |
📚 Sources
- CMS/NCHS. ICD-10-CM Official Guidelines for Coding and Reporting, FY2026.
- AAPC Codify. Z86.73 — Personal history of transient ischemic attack (TIA), and cerebral infarction without residual deficits.
- Unbound Medicine. ICD-10-CM Code Lookup: Z86.73.
- CMS. 2026 Model Software/ICD-10 Mappings.
- Cigna stroke coding guidance on history of stroke versus sequelae.