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🧠Stroke Awareness Month:

Why Coding Accuracy and Documentation Matter More Than Ever

Greetings!

May is Stroke Awareness Month—a timely opportunity to revisit one of the most scrutinized and frequently miscoded conditions in ICD 10 CM. Stroke remains a leading cause of long term disability in the U.S. and is on the OIG Work Plan because of ongoing challenges with coding accuracy, sequencing, and documentation gaps.

For coders, CDI specialists, and providers, clinical clarity and coding precision are essential for compliance protection in this high impact area.

🚨 Why Stroke Coding Is on the OIG Radar

The OIG continues to audit stroke claims because of:

• Incorrect assignment of acute stroke codes when the patient is actually experiencing late effects or history of stroke

• Misuse of I63 (cerebral infarction) vs. I61 (intracerebral hemorrhage) vs. I60 (subarachnoid hemorrhage)

• Failure to capture current residual deficits at the time of the acute stroke

• Failure to capture residual deficits using I69 codes after the acute phase

• Documentation that doesn’t clearly state whether the stroke is acute, evolving, old, or resolved

These errors lead to:

• Overpayments

• Denials

• Compliance risk

• Data inaccuracy for public health reporting

That’s why stroke remains a high risk diagnosis for payers and auditors.

🧩 ICD 10 CM Coding Refresher:

Acute Stroke vs. Sequela vs. History

1. Acute Stroke (I60–I63)

Use these codes only when the provider documents an active, current stroke.

Key documentation elements:

• Type (ischemic, hemorrhagic, embolic, thrombotic)

• Location (MCA, PCA, cerebellar, etc.)

• Laterality

• Etiology (if known)

No assumptions allowed. If the provider documents “stroke like symptoms,” coders must query or code the symptoms.

2. Sequela of Stroke (I69)

Use I69 codes when the patient is no longer experiencing an acute stroke but has residual deficits, such as:

• Hemiplegia

• Dysphagia

• Aphasia

• Cognitive impairment

Remember:

• Code the I69 code. Some codes may require an additional code to identify the residual deficit (only if the I69.- does not fully explain the deficit)

• If the provider documents “old stroke” with no deficits → Z86.73 (history of stroke).

3. History of Stroke (Z86.73)

Use when:

• The stroke is completely resolved.

• No ongoing deficits

• No current treatment for stroke related conditions

This remains one of the most commonly misused codes in audits.

Until the next time.

Happy Coding 

Coders Get Paid to Think

Mary D. Gregory, RHIT, CCS, CDIP, CRC, CPC, CCS-P