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K09.0

Developmental odontogenic cysts

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 12 never code together

Excludes2

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

K09code

Excludes2

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

K00-K95chapter

Excludes2

certain conditions originating in the perinatal period (P04-P96)P04-P96
certain infectious and parasitic diseases (A00-B99)A00-B99
complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
neoplasms (C00-D49)C00-D49
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 7

K09code

Includes

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

Inclusion terms

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

Index entries leading here 2

Cyst (colloid) (mucous) (simple) (retention)
- bone (local) NEC M85.60
  - specified type NEC M85.60
    - jaw M27.40
      - developmental (nonodontogenic) K09.1
        
        odontogenic K09.0
- dental (root) K04.8
  - developmental K09.0
  - eruption K09.0
  - primordial K09.0
- dentigerous (mandible) (maxilla) K09.0
- developmental K09.1
  - odontogenic K09.0
- eruption K09.0
- follicular (atretic) (hemorrhagic) (ovarian) N83.0
  - dentigerous K09.0
  - odontogenic K09.0
- gingiva K09.0
- jaw (bone) M27.40
  - developmental (odontogenic) K09.0
- lateral periodontal K09.0
- mandible M27.40
  - dentigerous K09.0
- maxilla M27.40
  - dentigerous K09.0
- odontogenic, developmental K09.0
- pericoronal K09.0
- periodontal K04.8
  - lateral K09.0
- primordial (jaw) K09.0
Dentigerous cyst K09.0

Alongside this code 3 same parent — K09

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

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Parent: K09
Block: K00-K14
Siblings: 3

Present FY2024–FY2027.