ICD-10 Q89.3
Billable / Specific CCSitus inversus
About ICD-10-CM Q89.3
ICD-10-CM code Q89.3 represents Situs inversus. This is a billable/specific code in the Congenital Malformations chapter (block Q89). The 2026 edition of ICD-10-CM Q89.3 became effective on October 1, 2025.
Coding Tips for Q89.3
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
Q89.3 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under Q89.3. Per CMS ICD-10-CM Tabular 2026.
- Dextrocardia with situs inversus
- Mirror-image atrial arrangement with situs inversus
- Situs inversus or transversus abdominalis
- Situs inversus or transversus thoracis
- Transposition of abdominal viscera
- Transposition of thoracic viscera
Type 1 Excludes
Pure excludes, these codes can never be coded together with Q89.3. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- dextrocardia NOS (Q24.0)
Inpatient DRG Impact, CC
codes Situs inversus. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for Q89.3
Local Coverage Determinations (LCDs) from CMS MACs that list Q89.3 as a covered diagnosis.
Showing top 10 of 89 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Q89.3.
2 Aetna
1 Cigna
3 Medicare
CPT Codes Commonly Billed with Q89.3
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert Q89.3 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| Q89.3 | 7593 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To Q89.3
Other codes in section Q80-Q89 (Other congenital malformations).
ICD-10 Q89.3, Billing FAQ
Is ICD-10 code Q89.3 billable? +
Yes, Q89.3 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to Q89.3? +
ICD-10 Q89.3 includes: Dextrocardia with situs inversus; Mirror-image atrial arrangement with situs inversus; Situs inversus or transversus abdominalis, and 3 more clinical synonyms.
What codes are Type 1 Excludes for Q89.3? +
Type 1 Excludes (never code together with Q89.3): dextrocardia NOS (Q24.0)
Is Q89.3 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What ICD-9 codes does Q89.3 map to? +
Per CMS GEMs, Q89.3 maps to ICD-9 codes: 7593. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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