What is the ICD-10 code for congenital absence of appendix?

The ICD-10 code for congenital absence of the appendix is Q43.0. It is used when the absence is confirmed by prenatal imaging and there is no surgical history.

How do you code acquired absence of the appendix?

Use ICD-10 code Z90.89 for acquired absence of the appendix, typically after surgical removal, confirmed by operative reports.

ICD-10 Coding for Absence of Appendix(Q43.0, K35.2, Z90.89)

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Learn about ICD-10 coding for absence of appendix, including congenital (Q43.0) and acquired (Z90.89) cases, with documentation requirements and coding tips.

Also known as:

Appendix MissingAppendix Absent

Related ICD-10 Code Ranges

Complete code families applicable to Absence of Appendix

Q00-Q99Primary Range

Congenital malformations, deformations and chromosomal abnormalities

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Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

Code	Description	When to Use	Key Documentation
Q43.0	Congenital absence of appendix	Use when congenital absence is confirmed by prenatal imaging and there is no surgical history.	Prenatal ultrasound findings No surgical history Associated intestinal malformations
Z90.89	Acquired absence of other specified organs	Use when absence is due to surgical removal, confirmed by operative reports.	Operative report available Scar documentation Post-op complications requiring coding

Primary ICD-10-CM Codes

Meckel's diverticulum (displaced) (hypertrophic)

Q43.0Billable

Differential Codes

Alternative codes to consider when ruling out similar conditions

Acquired absence of appendixZ90.89

Congenital absence of appendixQ43.0

Documentation & Coding Risks

Avoid these common issues when documenting Absence of Appendix.

Coding absence based on 'not visualized' imaging reports.

Impact

Clinical: Misleading clinical records., Regulatory: Non-compliance with coding standards., Financial: Potential claim denials.

Mitigation

Require imaging confirmation, Verify surgical history

Coding congenital absence without imaging confirmation.

Impact

Reimbursement: Incorrect DRG assignment may occur., Compliance: Non-compliance with ICD-10 guidelines., Data Quality: Inaccurate patient records.

Mitigation

Ensure prenatal imaging confirms absence before coding as congenital.

Coding acquired absence without surgical documentation.

Impact

Reimbursement: Potential denial of claims., Compliance: Failure to meet documentation standards., Data Quality: Misleading patient history.

Mitigation

Verify operative reports before coding Z90.89.

Misclassification of absence type

Impact

Risk of coding congenital absence without proper imaging confirmation.

Mitigation

Implement mandatory imaging review for congenital absence coding.

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with Q43.0.

Primary Code

Q43.0

Meckel's diverticulum (displaced) (hypertrophic)

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ICD-10 codes4

Coding risks4

FAQs2

ICD-10 Coding for Absence of Appendix(Q43.0, K35.2, Z90.89)

Documentation & Coding Risks

Frequently Asked Questions

What is the ICD-10 code for congenital absence of appendix?

How do you code acquired absence of the appendix?

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