K09.0 Developmental odontogenic cysts

Billable ICD-10-CM code, FY2026.

Applicable to

• Dentigerous cyst
• Eruption cyst
• Follicular cyst
• Gingival cyst
• Lateral periodontal cyst
• Primordial cyst

Excludes2 (not included here)

• keratocysts (D16.4, D16.5)
• odontogenic keratocystic tumors (D16.4, D16.5)

Applies from K09 Cysts of oral region, not elsewhere classified

Includes

• lesions showing histological features both of aneurysmal cyst and of another fibro-osseous lesion

Excludes2 (not included here)

• cysts of jaw (M27.0-, M27.4-)
• radicular cyst (K04.8)

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 526.0 Developmental odontogenic cysts

Code annotations containing back-references to K09.0

Back-references to K09.0

• Type 2 Excludes: K04.8 Radicular cyst ("lateral periodontal cyst (K09.0)")
• Type 2 Excludes: K06.8 Other specified disorders of gingiva and edentulous alveolar ridge ("gingival cyst (K09.0)")

Back-references to K09

• Type 2 Excludes: K13 Other diseases of lip and oral mucosa ("cysts of oral region (K09.-)")
• Type 1 Excludes: M27.4 Other and unspecified cysts of jaw ("cysts of oral region (K09.-)")

Diagnosis Index entries for K09.0

• Cyst (colloid) (mucous) (simple) (retention) › bone (local) NEC › specified type NEC › jaw › developmental (nonodontogenic) › odontogenic
• Cyst (colloid) (mucous) (simple) (retention) › dental (root) › developmental
• Cyst (colloid) (mucous) (simple) (retention) › dental (root) › eruption
• Cyst (colloid) (mucous) (simple) (retention) › dental (root) › primordial
• Cyst (colloid) (mucous) (simple) (retention) › dentigerous (mandible) (maxilla)
• Cyst (colloid) (mucous) (simple) (retention) › developmental › odontogenic
• Cyst (colloid) (mucous) (simple) (retention) › eruption
• Cyst (colloid) (mucous) (simple) (retention) › follicular (atretic) (hemorrhagic) (ovarian) › dentigerous
• Cyst (colloid) (mucous) (simple) (retention) › follicular (atretic) (hemorrhagic) (ovarian) › odontogenic
• Cyst (colloid) (mucous) (simple) (retention) › gingiva
• Cyst (colloid) (mucous) (simple) (retention) › jaw (bone) › developmental (odontogenic)
• Cyst (colloid) (mucous) (simple) (retention) › lateral periodontal
• Cyst (colloid) (mucous) (simple) (retention) › mandible › dentigerous
• Cyst (colloid) (mucous) (simple) (retention) › maxilla › dentigerous
• Cyst (colloid) (mucous) (simple) (retention) › odontogenic, developmental
• Cyst (colloid) (mucous) (simple) (retention) › pericoronal
• Cyst (colloid) (mucous) (simple) (retention) › periodontal › lateral
• Cyst (colloid) (mucous) (simple) (retention) › primordial (jaw)
• Dentigerous cyst

Nearby codes

• K09 Cysts of oral region, not elsewhere classified
• K09.0 Developmental odontogenic cysts (this code)
• K09.1 Developmental (nonodontogenic) cysts of oral region
• K09.8 Other cysts of oral region, not elsewhere classified
• K09.9 Cyst of oral region, unspecified