ICD-10 K35.890
Billable / Specific CCOther acute appendicitis without perforation or gangrene
About ICD-10-CM K35.890
ICD-10-CM code K35.890 represents Other acute appendicitis without perforation or gangrene. This is a billable/specific code in the Digestive System chapter (block K35). The 2026 edition of ICD-10-CM K35.890 became effective on October 1, 2025.
Coding Tips for K35.890
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
K35.890 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
codes Other acute appendicitis without perforation or gangrene. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for K35.890
Local Coverage Determinations (LCDs) from CMS MACs that list K35.890 as a covered diagnosis.
Showing top 10 of 59 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing K35.890.
3 Medicare
CPT Codes Commonly Billed with K35.890
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.
Codes Adjacent To K35.890
Other codes in section K35-K38 (Diseases of appendix).
ICD-10 K35.890, Billing FAQ
Is ICD-10 code K35.890 billable? +
Yes, K35.890 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Is K35.890 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.
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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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