2027 ICD-10-CM Diagnosis Code Q43.5Ectopic anus
ICD-10-CM Codes›Q00-Q99›Q38-Q45›Q43
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- POA Exempt
- Chronic Condition
Q43.5 is a billable ICD-10-CM diagnosis code for ectopic anus. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 393 through 395. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 21 closely related codes. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Digestive congenital anomalies.
Code Identity
Code Classification
Present on Admission (POA)Billing
Q43.5 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Other congenital malformations of the digestive system (Q38-Q45).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Ectopic anus
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to Q43.5: its own notes plus those printed at Chapter 17. A note printed at a category, block or chapter applies to every code under it.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Notes
General instructions on how these codes are used.
- Codes from this chapter are not for use on maternal records
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Anal Disorders
Your anus is the opening at the end of your large intestine. It is where stool (poop) leaves your body.
The full article covers:
- What is the anus?
- What are anal disorders?
- What are the symptoms of anal disorders?
- How are anal disorders diagnosed?
- How are anal disorders treated?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert Q43.5 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Q43.5Overview
What is the ICD-10 code for ectopic anus?
The ICD-10-CM code for ectopic anus is Q43.5 (sometimes written as Q435). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is Q43.5 (Other congenital malformations of intestine) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report ectopic anus on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does Q43.5 group to?
When ectopic anus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 394, 395, 393, with relative weights from 0.6379 to 1.5877 depending on complications. Higher weights mean higher Medicare reimbursement.
Is Q43.5 a CC or MCC?
CMS lists Q43.5 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 21 closely related codes in its exclusion list.
Is Q43.5 exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for ectopic anus on inpatient claims. The code appears in the Other congenital malformations of the digestive system (Q38-Q45) range of the CMS exempt list.
