DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

K09 Cysts of oral region, not elsewhere classified

  • Header · not billable

K09 is not billable. The category heads 4 billable codes in FY2027: the 4 codes directly below it.

Index → code

  • Dentigerous cyst → K09.0
  • Epstein'spearl → K09.8
  • Pearl(s)Epstein's → K09.8

Where it sits

  1. Chapter 11 Diseases of the digestive system (K00-K95)
  2. K00-K14 Diseases of oral cavity and salivary glands (K00-K14)
  3. K09 Cysts of oral region, not elsewhere classified
Billable codes
4
Subdivisions
4
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
48

Codes in K09

  1. K09.0
    Developmental odontogenic cysts
    Billable
    Inclusion terms 6, Excludes2 2

    Inclusion terms

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

    Excludes2

  2. K09.1
    Developmental (nonodontogenic) cysts of oral region
    Billable
    Inclusion terms 7

    Inclusion terms

    • Cyst (of) incisive canal
    • Cyst (of) palatine of papilla
    • Globulomaxillary cyst
    • Median palatal cyst
    • Nasoalveolar cyst
    • Nasolabial cyst
    • Nasopalatine duct cyst
  3. K09.8
    Other cysts of oral region, not elsewhere classified
    Billable
    Inclusion terms 4

    Inclusion terms

    • Dermoid cyst
    • Epidermoid cyst
    • Lymphoepithelial cyst
    • Epstein's pearl
  4. K09.9
    Cyst of oral region, unspecified
    Billable

Sources of each column.

Instructions

At K09

Includes

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

Excludes2

Notes that also apply

Chapter 11 instructions (Excludes2 8): printed on the chapter 11 page.

Index entries

  • Dentigerous cyst → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)dentigerous (mandible) (maxilla) → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)eruption → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)gingiva → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)lateral periodontal → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)odontogenic, developmental → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)pericoronal → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)primordial (jaw) → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)developmental → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)fissural (oral region) → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)globulomaxillary → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)incisive canal → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)nasoalveolar → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)nasolabial → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)nasopalatine (anterior) (duct) → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)palate (median) (fissural) → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)palatine papilla (jaw) → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)buccal → K09.8
  • Cyst (colloid) (mucous) (simple) (retention)lymphoepithelial, oral soft tissue → K09.8
  • Cyst (colloid) (mucous) (simple) (retention)mouth → K09.8
  • Epstein'spearl → K09.8
  • Pearl(s)Epstein's → K09.8
  • Cyst (colloid) (mucous) (simple) (retention)dental (root)developmental → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)dental (root)eruption → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)dental (root)primordial → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)developmentalodontogenic → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)follicular (atretic) (hemorrhagic) (ovarian)dentigerous → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)follicular (atretic) (hemorrhagic) (ovarian)odontogenic → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)jaw (bone)developmental (odontogenic) → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)mandibledentigerous → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)maxilladentigerous → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)periodontallateral → K09.0
  • Cyst (colloid) (mucous) (simple) (retention)anteriornasopalatine → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)developmentaloral region (nonodontogenic) → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)jaw (bone)fissural → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)mediananterior maxillary → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)medianpalatal → K09.1
  • Cyst (colloid) (mucous) (simple) (retention)dermoidmouth → K09.8
  • Cyst (colloid) (mucous) (simple) (retention)dermoidoral soft tissue → K09.8
  • Cyst (colloid) (mucous) (simple) (retention)epidermal, epidermoid (inclusion) (see also Cyst, skin)mouth → K09.8

8 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy