K04.8: Radicular cyst | ICD-10-CM Code

Clinical notes

Excludes2 (not included here)

An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.

lateral periodontal cyst (K09.0)

Also known as

Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.

Apical (periodontal) cyst
Periapical cyst
Residual radicular cyst

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

Related codes in this category

ICD-9-CM equivalent

Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.

5228

View full ICD-10 → ICD-9 crosswalk →

Associated MS-DRGs

K04.8 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.

Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.