ICD-10 I27.840
Billable / Specific CCFontan-associated liver disease [FALD]
About ICD-10-CM I27.840
ICD-10-CM code I27.840 represents Fontan-associated liver disease [FALD]. This is a billable/specific code in the Circulatory System chapter (block I27). The 2026 edition of ICD-10-CM I27.840 became effective on October 1, 2025.
Coding Tips for I27.840
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
I27.840 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.
Inpatient DRG Impact, CC
code Fontan-associated liver disease [FALD]. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for I27.840
Local Coverage Determinations (LCDs) from CMS MACs that list I27.840 as a covered diagnosis.
Showing top 10 of 292 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I27.840.
5 Medicare
CPT Codes Commonly Billed with I27.840
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 93979 CMS LCD: Billing and Coding: Non-Invasive Abdominal / Visceral Vascular Studies CMS LCD
- 93975 CMS LCD: Billing and Coding: Non-Invasive Abdominal / Visceral Vascular Studies CMS LCD
- 93976 CMS LCD: Billing and Coding: Non-Invasive Abdominal / Visceral Vascular Studies CMS LCD
- 93978 CMS LCD: Billing and Coding: Non-Invasive Abdominal / Visceral Vascular Studies CMS LCD
- 93980 CMS LCD: Billing and Coding: Non-Invasive Abdominal / Visceral Vascular Studies CMS LCD
- 93981 CMS LCD: Billing and Coding: Non-Invasive Abdominal / Visceral Vascular Studies CMS LCD
- 93990 CMS LCD: Billing and Coding: Non-Invasive Peripheral Venous Vascular and Hemodialysis Access Studies CMS LCD
- 93985 CMS LCD: Billing and Coding: Non-Invasive Peripheral Venous Vascular and Hemodialysis Access Studies CMS LCD
- 93986 CMS LCD: Billing and Coding: Non-Invasive Peripheral Venous Vascular and Hemodialysis Access Studies CMS LCD
Codes Adjacent To I27.840
Other codes in section I26-I28 (Pulmonary heart disease and diseases of pulmonary circulation).
ICD-10 I27.840, Billing FAQ
Is ICD-10 code I27.840 billable? +
Yes, I27.840 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Is I27.840 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 CPT codes are commonly billed with I27.840? +
Procedures frequently paired with I27.840 include: 93979, 93975, 93976, 93978, 93980.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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