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ICD-10 Coding for Angelman Syndrome(Q93.51)

Complete ICD-10-CM coding and documentation guide for Angelman Syndrome. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

Happy Puppet SyndromeAS

Related ICD-10 Code Ranges

Complete code families applicable to Angelman Syndrome

Q93.5-Q93.51Primary Range

Other deletions of part of a chromosome

This range includes specific codes for chromosomal deletions, with Q93.51 specifically for Angelman Syndrome.

Key Information: ICD-10 code for Angelman syndrome

Essential facts and insights about Angelman Syndrome

The ICD-10 code for Angelman syndrome is Q93.51, used for confirmed cases with genetic testing.

Primary ICD-10-CM Code for angelman syndrome

Angelman syndrome
Billable Code

Decision Criteria

clinical Criteria

  • Confirmed genetic testing showing Angelman syndrome

documentation Criteria

  • Detailed documentation of symptoms such as developmental delay, seizures, and ataxia

Applicable To

  • Confirmed Angelman syndrome diagnosis

Excludes

Clinical Validation Requirements

  • Genetic confirmation of maternal 15q11.2-13 deletion
  • UBE3A mutation
  • Imprinting defect
  • Paternal UPD

Code-Specific Risks

  • Incorrectly using Q93.5 instead of Q93.51

Coding Notes

  • Ensure genetic testing results are documented to support the use of Q93.51.

Ancillary Codes

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

Epileptic seizures

G40.909
Use when seizures are present in Angelman syndrome patients.

Expressive language disorder

F80.4
Use for expressive language impairment associated with Angelman syndrome.

Global developmental delay

R62.7
Use for developmental delays in Angelman syndrome.

Differential Codes

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

Rett syndrome

F84.2
Rett syndrome involves MECP2 mutation and regression after 6–18 months, unlike Angelman syndrome.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Angelman Syndrome to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code Q93.51.

Impact

Clinical: May lead to misdiagnosis or inappropriate treatment., Regulatory: Non-compliance with documentation standards., Financial: Potential for denied claims due to insufficient documentation.

Mitigation Strategy

Provide detailed descriptions of symptoms and test results., Use standardized documentation templates.

Impact

Reimbursement: Incorrect coding may lead to claim denials., Compliance: Non-compliance with ICD-10 coding standards., Data Quality: Inaccurate data collection for research and treatment tracking.

Mitigation Strategy

Ensure genetic testing confirms Angelman syndrome for accurate coding.

Impact

Lack of detailed genetic test results can lead to audit issues.

Mitigation Strategy

Ensure all genetic testing results are thoroughly documented in the patient's record.

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 Angelman Syndrome, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Angelman Syndrome

Use these documentation templates to ensure complete and accurate documentation for Angelman Syndrome. These templates include all required elements for proper coding and billing.

Neurology Progress Note for Angelman Syndrome

Specialty: Neurology

Required Elements

  • Chief Complaint
  • Assessment
  • Plan

Example Documentation

Chief Complaint: Increased seizure frequency and sleep disturbances. Assessment: 1. Angelman syndrome (Q93.51) – confirmed maternal 15q11.2 deletion via CMA. 2. Drug-resistant epilepsy (G40.909) – last EEG: 3 Hz spike-and-wave activity. 3. Severe expressive language disorder (F80.4). Plan: Adjust levetiracetam dose for breakthrough myoclonus.

Examples: Poor vs. Good Documentation

Poor Documentation Example
Developmental delay, happy demeanor.
Good Documentation Example
Global developmental delay (Bayley Scales score <50), frequent laughter unrelated to context, jerky limb movements.
Explanation
The good example provides specific clinical details and test results, supporting the diagnosis and coding.

Need help with ICD-10 coding for Angelman Syndrome? Ask your questions below.

Ask about any ICD-10 CM code, or paste a medical note

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