Topic: Shock

Shock is a life-threatening state of circulatory failure resulting in inadequate oxygen delivery and tissue perfusion. It may occur due to decreased oxygen delivery, increased oxygen demand, impaired oxygen utilization, or a combination of these factors.

▸	Cardiac dysfunction and decreased output
▸	Hypovolemia from hemorrhage or dehydration
▸	Severe infection or sepsis
▸	Vasodilation related to anaphylaxis or medications
▸	Drug-induced cardiovascular depression
▸	Neurogenic causes (e.g., spinal cord injury)
▸	Obstructive causes (e.g., tension pneumothorax, cardiac tamponade)

Patients with shock commonly present with persistent hypotension that is refractory to adequate IV fluid resuscitation.

Tachypnea (>22 breaths/min) Tachycardia (>100 bpm) with weak pulse Altered mental status, confusion, or obtundation Pale, cool, clammy skin with diaphoresis Oliguria or anuria (<0.5 mL/kg/hr urine output) Dizziness or lightheadedness Chest pain

Adult Diagnostic Criteria

Clinical findings may include:

▸	Refractory hypotension despite adequate fluid resuscitation
▸	Systolic blood pressure (SBP) <90 mmHg
▸	Mean arterial pressure (MAP) <70 mmHg
▸	Decrease in baseline SBP ≥30 mmHg
▸	Elevated lactate >3–4 mmol/L
▸	pCO₂ <32 mmHg
▸	Reduced cardiac output and/or systemic vascular resistance
▸	Evidence of tissue hypoperfusion or organ dysfunction

Pediatric Diagnostic Criteria

Age Group	Hypotension Threshold
0–28 days	SBP <60 mmHg
1–12 months	SBP <70 mmHg
1–9 years	SBP <70 mmHg + (2 × age in years)
≥10 years	SBP <90 mmHg

▸	ICD-10-CM/PCS Coding Clinic, 4Q 2022: Septic shock and infectious conditions
▸	ICD-10-CM/PCS Coding Clinic, 1Q 2022: Toxic shock syndrome with unspecified sepsis
▸	ICD-10-CM/PCS Coding Clinic, 1Q 2021: Postprocedural vasoplegic circulatory shock
▸	ICD-10-CM/PCS Coding Clinic, 3Q 2020: Cardiac arrest with cardiogenic shock
▸	ICD-10-CM/PCS Coding Clinic, 2Q 2020: Severe sepsis due to ventilator-associated pneumonia
▸	ICD-10-CM/PCS Coding Clinic, 2Q 2019: Hypovolemic shock due to volume depletion
▸	ICD-10-CM/PCS Coding Clinic, 3Q 2016: Sepsis coding guidelines and issues

General Coding Guidance

▸	Codes R57.0, R57.1, R57.8, and R57.9 identify the etiology of shock; sequence the underlying cause first when applicable.
▸	Do not assign these codes when shock is specifically classified as:

Postprocedural Shock

Assign postprocedural shock codes only when the provider clearly documents a cause-and-effect relationship using terminology such as:

Excludes1 Considerations

There are Excludes1 notes involving:

The primary goals of treatment are restoration of tissue perfusion, correction of the underlying cause, and prevention of end-organ failure.

Shock is generally considered resolved prior to discharge unless the patient expires or transfers to another facility.

Type of Shock	CC/MCC Status
Shock unspecified	CC
Cardiogenic Shock	MCC
Hypovolemic Shock	MCC
Hemorrhagic Shock	MCC
Septic Shock	MCC
Shock due to drugs	MCC
Shock due to adverse effect of drugs	CC
Post traumatic or traumatic shock	MCC
Anaphylactic shock	CC
Neurogenic shock (goes to unspecified shock)	CC
Shock during or resulting from procedure	CC

1	Clarify Shock Type

Query when documentation is nonspecific or conflicting, especially with:

▸	R57.9  Shock, unspecified
▸	Persistent hypotension requiring vasopressors
▸	Elevated lactate with organ dysfunction
▸	Documentation of “hypotension” without a definitive diagnosis
▸	“Compensated shock” further develops additional clinical indicators of progression

2	Clarify Underlying Etiology

Ensure shock is linked to a definitive cause when clinically supported, such as:

3	Evaluate Severity and Clinical Support

Assess whether clinical findings support:

Shock typically includes:

▸	Persistent hypotension refractory to fluids
▸	Tissue hypoperfusion
▸	Organ dysfunction
▸	Vasopressor requirement

4	Capture Associated Organ Dysfunction

Review for secondary diagnoses related to shock, including, but not limited to:

5	Present on Admission (POA)

Verify accurate POA assignment for shock diagnoses, as POA status may significantly impact:

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MedlinePlus - Health Information from the National Library of Medicine, https://www.uptodate.com, Home - Pinson & Tang, LLC, 3M Software

The information and opinions presented here are based on the experience, training, and interpretation of the author. Although the information has been researched and reviewed for accuracy, e4health does not accept any responsibility or liability regarding errors, omission, misuse, or misinterpretation. This information is intended as a guide; it should not be considered a legal/consulting opinion or advice.