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ICD-10 Coding for Viral Exanthem Rash(B08.21, B08.3, B09)

Complete ICD-10-CM coding and documentation guide for Viral Exanthem Rash. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

Viral RashExanthema SubitumRoseolaFifth Disease

Related ICD-10 Code Ranges

Complete code families applicable to Viral Exanthem Rash

B08.2-B08.3Primary Range

Viral infections characterized by skin and mucous membrane lesions

This range includes specific viral exanthems such as roseola and erythema infectiosum.

Unspecified viral infection characterized by skin and mucous membrane lesions

Used when the specific viral cause of the exanthem is not identified.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
B08.21Roseola infantum, HHV-6 confirmedUse when HHV-6 is confirmed as the cause of roseola.
  • HHV-6 PCR positive
  • Sudden fever resolution followed by rash
B08.3Erythema infectiosumUse when erythema infectiosum is confirmed, typically with 'slapped cheek' appearance.
  • Parvovirus B19 IgM positive
  • 'Slapped cheek' rash appearance
B09Unspecified viral infection characterized by skin and mucous membrane lesionsUse when the specific viral cause of the rash is not identified.
  • Generalized rash without specific viral identification

Clinical Decision Support

Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.

Key Information: ICD-10 code for viral exanthem rash

Essential facts and insights about Viral Exanthem Rash

The ICD-10 code for unspecified viral exanthem rash is B09. For specific types like roseola, use B08.21, and for erythema infectiosum, use B08.3.

Primary ICD-10-CM Codes for viral exanthem rash

Roseola infantum, HHV-6 confirmed
Billable Code

Decision Criteria

clinical Criteria

  • HHV-6 PCR positive

Applicable To

  • Roseola infantum
  • Exanthema subitum

Excludes

Clinical Validation Requirements

  • HHV-6 PCR positive
  • Sudden fever resolution followed by rash

Code-Specific Risks

  • Misclassification if HHV-6 is not confirmed

Coding Notes

  • Ensure documentation specifies HHV-6 confirmation.

Ancillary Codes

Additional codes that should be used in conjunction with the main diagnosis codes when applicable.

Rash and other nonspecific skin eruption

R21
Use if rash is present but viral cause is not confirmed.

Differential Codes

Alternative codes to consider when ruling out similar conditions to the primary diagnosis.

Measles, unspecified

B05.9
Presence of Koplik spots and vaccination history

Unspecified viral infection with skin lesions

B09
Lack of specific viral identification

Roseola infantum, HHV-6 confirmed

B08.21
HHV-6 confirmation

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Viral Exanthem Rash to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code B08.21.

Impact

Clinical: May lead to inappropriate treatment decisions., Regulatory: Increases risk of audit and compliance issues., Financial: Potential for reduced reimbursement.

Mitigation Strategy

Ensure thorough documentation of clinical findings, Request laboratory confirmation when possible

Impact

Reimbursement: May lead to lower DRG assignment and reimbursement., Compliance: Increases risk of audit due to unspecified coding., Data Quality: Reduces specificity and accuracy of health records.

Mitigation Strategy

Use specific codes like B08.21 or B08.3 when the virus is identified.

Impact

Using B09 without attempting to identify specific viral cause.

Mitigation Strategy

Encourage detailed documentation and laboratory testing.

Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.

Frequently Asked Questions

Common questions about ICD-10 coding for Viral Exanthem Rash, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Viral Exanthem Rash

Use these documentation templates to ensure complete and accurate documentation for Viral Exanthem Rash. These templates include all required elements for proper coding and billing.

Pediatric patient with viral rash

Specialty: Pediatrics

Required Elements

  • Chief complaint
  • History of present illness
  • Physical examination findings
  • Laboratory results
  • Assessment and plan

Example Documentation

CC: Fever and rash. HPI: 3-day history of high fever followed by rash. PE: Blanchable pink papules on trunk. Labs: HHV-6 IgM positive. Assessment: Roseola infantum (B08.21).

Examples: Poor vs. Good Documentation

Poor Documentation Example
Rash present, likely viral.
Good Documentation Example
Erythematous papules on extremities ×3 days; PCR positive for coxsackievirus A16.
Explanation
The good example provides specific clinical findings and laboratory confirmation, allowing for accurate coding.

Need help with ICD-10 coding for Viral Exanthem Rash? Ask your questions below.

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