ICD-10 K36
Billable / SpecificOther appendicitis
About ICD-10-CM K36
ICD-10-CM code K36 represents Other appendicitis. This is a billable/specific code in the Digestive System chapter (block K36). The 2026 edition of ICD-10-CM K36 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under K36. Per CMS ICD-10-CM Tabular 2026.
- Chronic appendicitis
- Recurrent appendicitis
Medicare LCD Coverage for K36
Local Coverage Determinations (LCDs) from CMS MACs that list K36 as a covered diagnosis.
Showing top 9. Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing K36.
1 Medicare
CPT Codes Commonly Billed with K36
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
Convert K36 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 |
|---|---|---|
| K36 | 542 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To K36
Other codes in section K35-K38 (Diseases of appendix).
ICD-10 K36, Billing FAQ
Is ICD-10 code K36 billable? +
Yes, K36 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 K36? +
ICD-10 K36 includes: Chronic appendicitis; Recurrent appendicitis.
What CPT codes are commonly billed with K36? +
Procedures frequently paired with K36 include: 44970, 44950.
What ICD-9 codes does K36 map to? +
Per CMS GEMs, K36 maps to ICD-9 codes: 542. Useful for legacy data review and historical claim analysis.
Get the full PayerReady toolkit
Free access to CPT/ICD-10 lookup, denial appeals, fee comparator, and claim auditing with credentialing enrollment.
Start free →Run this code through our claim audit tool
Check NCCI bundling, MUE limits, and modifier logic before submission.
Try the auditor →Did this page help?
Quick signal so we know what to improve.
If you want a code reference page that doesn't exist yet, email coding@payerready.com.
Tell us what's missing or wrong: coding@payerready.com. We respond within 5 business days.
Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
Powered by 11K CPT · 98K ICD-10 · 860K MPFS rates · 4.5M NCCI edits · 9.5M NPIs. Our data methodology · About our coding team